Manage API keys

This page describes how to create, edit, and restrict API keys.

Introduction to API keys

When you use an API key to authenticate to an API, the API key does not identify a principal. The API key associates the request with a Google Cloud project for billing and quota purposes. Without a principal, the request can't use Identity and Access Management (IAM) to check whether the caller is authorized to perform the requested operation.

An API key has the following components, which you use to manage and use the key:

String

The API key string is an encrypted string, for example, AIzaSyDaGmWKa4JsXZ-HjGw7ISLn_3namBGewQe. When you use an API key to authenticate, you always use the key's string. API keys do not have an associated JSON file.

ID

The API key ID is used by Google Cloud administrative tools to uniquely identify the key. The key ID cannot be used to authenticate. The key ID can be found in the URL of the key's edit page in the Google Cloud console. You can also get the key ID by using the Google Cloud CLI to list the keys in your project.

Display name

The display name is an optional, descriptive name for the key, which you can set when you create or update the key.

Before you begin

Complete the following tasks to use the samples on this page.

Set up authentication

Select the tab for how you plan to use the samples on this page:

Console

When you use the Google Cloud console to access Google Cloud services and APIs, you don't need to set up authentication.

gcloud

In the Google Cloud console, activate Cloud Shell.

Activate Cloud Shell

At the bottom of the Google Cloud console, a Cloud Shell session starts and displays a command-line prompt. Cloud Shell is a shell environment with the Google Cloud CLI already installed and with values already set for your current project. It can take a few seconds for the session to initialize.

C++

To use the C++ samples on this page in a local development environment, install and initialize the gcloud CLI, and then set up Application Default Credentials with your user credentials.

1. Install the Google Cloud CLI.

2. To initialize the gcloud CLI, run the following command:

   gcloud init

3. If you're using a local shell, then create local authentication credentials for your user account:

   gcloud auth application-default login

   You don't need to do this if you're using Cloud Shell.

For more information, see Set up authentication for a local development environment in the Google Cloud authentication documentation.

Java

To use the Java samples on this page in a local development environment, install and initialize the gcloud CLI, and then set up Application Default Credentials with your user credentials.

1. Install the Google Cloud CLI.

2. To initialize the gcloud CLI, run the following command:

   gcloud init

3. If you're using a local shell, then create local authentication credentials for your user account:

   gcloud auth application-default login

   You don't need to do this if you're using Cloud Shell.

For more information, see Set up authentication for a local development environment in the Google Cloud authentication documentation.

Python

To use the Python samples on this page in a local development environment, install and initialize the gcloud CLI, and then set up Application Default Credentials with your user credentials.

1. Install the Google Cloud CLI.

2. To initialize the gcloud CLI, run the following command:

   gcloud init

3. If you're using a local shell, then create local authentication credentials for your user account:

   gcloud auth application-default login

   You don't need to do this if you're using Cloud Shell.

For more information, see Set up authentication for a local development environment in the Google Cloud authentication documentation.

REST

To use the REST API samples on this page in a local development environment, you use the credentials you provide to the gcloud CLI.

Install the Google Cloud CLI, then initialize it by running the following command:

gcloud init

For more information, see Authenticate for using REST in the Google Cloud authentication documentation.

Required roles

To get the permissions that you need to manage API keys, ask your administrator to grant you the following IAM roles on your project:

• API Keys Admin (roles/serviceusage.apiKeysAdmin)
• Restrict an API key to specific APIs by using the Google Cloud console: Service Usage Viewer (roles/serviceusage.serviceUsageViewer)

For more information about granting roles, see Manage access to projects, folders, and organizations.

You might also be able to get the required permissions through custom roles or other predefined roles.

Create an API key

To create an API key, use one of the following options:

Console

1. In the Google Cloud console, go to the Credentials page:

   Go to Credentials

2. Click Create credentials, then select API key from the menu.

   The API key created dialog displays the string for your newly created key.

gcloud

You use the gcloud services api-keys create command to create an API key.

Replace DISPLAY_NAME with a descriptive name for your key.

 gcloud services api-keys create --display-name=DISPLAY_NAME
 

C++

To run this sample, you must install the API Keys client library.

#include "google/cloud/apikeys/v2/api_keys_client.h"
#include "google/cloud/location.h"

google::api::apikeys::v2::Key CreateApiKey(
    google::cloud::apikeys_v2::ApiKeysClient client,
    google::cloud::Location location, std::string display_name) {
  google::api::apikeys::v2::CreateKeyRequest request;
  request.set_parent(location.FullName());
  request.mutable_key()->set_display_name(std::move(display_name));
  // As an example, restrict the API key's scope to the Natural Language API.
  request.mutable_key()->mutable_restrictions()->add_api_targets()->set_service(
      "language.googleapis.com");

  // Create the key, blocking on the result.
  auto key = client.CreateKey(request).get();
  if (!key) throw std::move(key.status());
  std::cout << "Successfully created an API key: " << key->name() << "\n";

  // For authenticating with the API key, use the value in `key->key_string()`.

  // The API key's resource name is the value in `key->name()`. Use this to
  // refer to the specific key in a `GetKey()` or `DeleteKey()` RPC.
  return *key;
}

Java

To run this sample, you must install the google-cloud-apikeys client library.

import com.google.api.apikeys.v2.ApiKeysClient;
import com.google.api.apikeys.v2.ApiTarget;
import com.google.api.apikeys.v2.CreateKeyRequest;
import com.google.api.apikeys.v2.Key;
import com.google.api.apikeys.v2.LocationName;
import com.google.api.apikeys.v2.Restrictions;
import java.io.IOException;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

public class CreateApiKey {

  public static void main(String[] args)
      throws IOException, ExecutionException, InterruptedException, TimeoutException {
    // TODO(Developer): Before running this sample,
    //  1. Replace the variable(s) below.
    //  2. Set up ADC as described in https://cloud.google.com/docs/authentication/external/set-up-adc
    //  3. Make sure you have the necessary permission to create API keys.
    String projectId = "GOOGLE_CLOUD_PROJECT_ID";

    createApiKey(projectId);
  }

  // Creates an API key.
  public static void createApiKey(String projectId)
      throws IOException, ExecutionException, InterruptedException, TimeoutException {
    // Initialize client that will be used to send requests. This client only needs to be created
    // once, and can be reused for multiple requests. After completing all of your requests, call
    // the `apiKeysClient.close()` method on the client to safely
    // clean up any remaining background resources.
    try (ApiKeysClient apiKeysClient = ApiKeysClient.create()) {

      Key key = Key.newBuilder()
          .setDisplayName("My first API key")
          // Set the API key restriction.
          // You can also set browser/ server/ android/ ios based restrictions.
          // For more information on API key restriction, see:
          // https://cloud.google.com/docs/authentication/api-keys#api_key_restrictions
          .setRestrictions(Restrictions.newBuilder()
              // Restrict the API key usage by specifying the target service and methods.
              // The API key can only be used to authenticate the specified methods in the service.
              .addApiTargets(ApiTarget.newBuilder()
                  .setService("translate.googleapis.com")
                  .addMethods("translate.googleapis.com.TranslateText")
                  .build())
              .build())
          .build();

      // Initialize request and set arguments.
      CreateKeyRequest createKeyRequest = CreateKeyRequest.newBuilder()
          // API keys can only be global.
          .setParent(LocationName.of(projectId, "global").toString())
          .setKey(key)
          .build();

      // Make the request and wait for the operation to complete.
      Key result = apiKeysClient.createKeyAsync(createKeyRequest).get(3, TimeUnit.MINUTES);

      // For authenticating with the API key, use the value in "result.getKeyString()".
      // To restrict the usage of this API key, use the value in "result.getName()".
      System.out.printf("Successfully created an API key: %s", result.getName());
    }
  }
}

Python

To run this sample, you must install the API Keys client library.

from google.cloud import api_keys_v2
from google.cloud.api_keys_v2 import Key


def create_api_key(project_id: str, suffix: str) -> Key:
    """
    Creates and restrict an API key. Add the suffix for uniqueness.

    TODO(Developer):
    1. Before running this sample,
      set up ADC as described in https://cloud.google.com/docs/authentication/external/set-up-adc
    2. Make sure you have the necessary permission to create API keys.

    Args:
        project_id: Google Cloud project id.

    Returns:
        response: Returns the created API Key.
    """
    # Create the API Keys client.
    client = api_keys_v2.ApiKeysClient()

    key = api_keys_v2.Key()
    key.display_name = f"My first API key - {suffix}"

    # Initialize request and set arguments.
    request = api_keys_v2.CreateKeyRequest()
    request.parent = f"projects/{project_id}/locations/global"
    request.key = key

    # Make the request and wait for the operation to complete.
    response = client.create_key(request=request).result()

    print(f"Successfully created an API key: {response.name}")
    # For authenticating with the API key, use the value in "response.key_string".
    # To restrict the usage of this API key, use the value in "response.name".
    return response

REST

You use the keys.create method to create an API key. This request returns a long-running operation; you must poll the operation to get the information for the new key.

Replace the following values:

• DISPLAY_NAME: Optional. A descriptive name for your key.
• PROJECT_ID: Your Google Cloud project ID or name.

curl -X POST \
-H "Authorization: Bearer $(gcloud auth print-access-token)" \
-H "Content-Type: application/json; charset=utf-8" \
-d {'"displayName" : "DISPLAY_NAME"'} \
"https://apikeys.googleapis.com/v2/projects/PROJECT/locations/global/keys"

For more information about creating API keys using the REST API, see Creating an API key in the API Keys API documentation.

Copy your key string and keep it secure. Use API key restrictions to limit how the key can be used.

Apply API key restrictions

API keys are unrestricted by default. Unrestricted keys are insecure because they can be used by anyone from anywhere. For production applications, you should set both application restrictions and API restrictions.

Add application restrictions

Application restrictions specify which websites, IP addresses, or apps can use an API key.

You can apply only one application restriction type at a time. Choose the restriction type based on your application type:

Option	Application type	Notes
HTTP referrers	Web applications	Specifies the websites that can use the key.
IP Addresses	Applications called by specific servers	Specifies the servers or cron jobs that can use the key.
Android apps	Android applications	Specifies the Android application that can use the key.
iOS apps	iOS applications	Specifies the iOS bundles that can use the key.

HTTP referrers

To restrict the websites that can use your API key, you add one or more HTTP referrer restrictions.

You can substitute a wildcard character (*) for the subdomain or the path, but you cannot insert a wildcard character into the middle of the URL. For example, *.example.com is valid, and accepts all sites ending in .example.com. However, mysubdomain*.example.com is not a valid restriction.

Port numbers can be included in HTTP referrer restrictions. If you include a port number, then only requests using that port are matched. If you do not specify a port number, then requests from any port number are matched.

You can add up to 1200 HTTP referrers to an API key.

The following table shows some example scenarios and browser restrictions:

Scenario	Restrictions
Allow a specific URL	Add a URL with an exact path. For example: www.example.com/path www.example.com/path/path Some browsers implement a referrer policy that sends only the origin URL for cross-origin requests. Users of these browsers can't use keys with page-specific URL restrictions.
Allow any URL in your site	You must set two URLs in the allowedReferers list. URL for the domain, without a subdomain, and with a wildcard for the path. For example: example.com/* A second URL that includes a wildcard for the subdomain and a wildcard for the path. For example: *.example.com/*
Allow any URL in a single subdomain or naked domain	You must set two URLs in the allowedReferers list to allow an entire domain: URL for the domain, without a trailing slash. For example: www.example.com sub.example.com example.com A second URL for the domain that includes a wildcard for the path. For example: www.example.com/* sub.example.com/* example.com/*

To restrict your API key to specific websites, use one of the following options:

Console

1. In the Google Cloud console, go to the Credentials page:

   Go to Credentials

2. Click the name of the API key that you want to restrict.

3. In the Application restrictions section, select HTTP referrers.

4. For each restriction that you want to add, click Add an item, enter the restriction, and click Done.

5. Click Save to save your changes and return to the API key list.

gcloud

1. Get the ID of the key that you want to restrict.

   The ID is not the same as the display name or the key string. You can get the ID by using the gcloud services api-keys list command to list the keys in your project.

2. Use the gcloud services api-keys update command to add HTTP referrer restrictions to an API key.

   Replace the following values:

   • KEY_ID: The ID of the key that you want to restrict.

   • ALLOWED_REFERRER_1: Your HTTP referrer restriction.

     You can add as many restrictions as needed; use commas to separate the restrictions. You must provide all referrer restrictions with the update command; the referrer restrictions provided replace any existing referrer restrictions on the key.

   gcloud services api-keys update KEY_ID \
    --allowed-referrers="ALLOWED_REFERRER_1"

Java

To run this sample, you must install the google-cloud-apikeys client library.

import com.google.api.apikeys.v2.ApiKeysClient;
import com.google.api.apikeys.v2.BrowserKeyRestrictions;
import com.google.api.apikeys.v2.Key;
import com.google.api.apikeys.v2.Restrictions;
import com.google.api.apikeys.v2.UpdateKeyRequest;
import com.google.protobuf.FieldMask;
import java.io.IOException;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

public class RestrictApiKeyHttp {

  public static void main(String[] args)
      throws IOException, ExecutionException, InterruptedException, TimeoutException {
    // TODO(Developer): Before running this sample,
    //  1. Replace the variable(s) below.
    String projectId = "GOOGLE_CLOUD_PROJECT_ID";

    // ID of the key to restrict. This ID is auto-created during key creation.
    // This is different from the key string. To obtain the key_id,
    // you can also use the lookup api: client.lookupKey()
    String keyId = "key_id";

    restrictApiKeyHttp(projectId, keyId);
  }

  // Restricts an API key. To restrict the websites that can use your API key,
  // you add one or more HTTP referrer restrictions.
  public static void restrictApiKeyHttp(String projectId, String keyId)
      throws IOException, ExecutionException, InterruptedException, TimeoutException {
    // Initialize client that will be used to send requests. This client only needs to be created
    // once, and can be reused for multiple requests. After completing all of your requests, call
    // the `apiKeysClient.close()` method on the client to safely
    // clean up any remaining background resources.
    try (ApiKeysClient apiKeysClient = ApiKeysClient.create()) {

      // Restrict the API key usage to specific websites by adding them
      // to the list of allowed_referrers.
      Restrictions restrictions = Restrictions.newBuilder()
          .setBrowserKeyRestrictions(BrowserKeyRestrictions.newBuilder()
              .addAllowedReferrers("www.example.com/*")
              .build())
          .build();

      Key key = Key.newBuilder()
          .setName(String.format("projects/%s/locations/global/keys/%s", projectId, keyId))
          // Set the restriction(s).
          // For more information on API key restriction, see:
          // https://cloud.google.com/docs/authentication/api-keys
          .setRestrictions(restrictions)
          .build();

      // Initialize request and set arguments.
      UpdateKeyRequest updateKeyRequest = UpdateKeyRequest.newBuilder()
          .setKey(key)
          .setUpdateMask(FieldMask.newBuilder().addPaths("restrictions").build())
          .build();

      // Make the request and wait for the operation to complete.
      Key result = apiKeysClient.updateKeyAsync(updateKeyRequest).get(3, TimeUnit.MINUTES);

      // For authenticating with the API key, use the value in "result.getKeyString()".
      System.out.printf("Successfully updated the API key: %s", result.getName());
    }
  }
}

Python

To run this sample, you must install the API Keys client library.

from google.cloud import api_keys_v2
from google.cloud.api_keys_v2 import Key


def restrict_api_key_http(project_id: str, key_id: str) -> Key:
    """
    Restricts an API key. To restrict the websites that can use your API key,
    you add one or more HTTP referrer restrictions.

    TODO(Developer): Replace the variables before running this sample.

    Args:
        project_id: Google Cloud project id.
        key_id: ID of the key to restrict. This ID is auto-created during key creation.
            This is different from the key string. To obtain the key_id,
            you can also use the lookup api: client.lookup_key()

    Returns:
        response: Returns the updated API Key.
    """

    # Create the API Keys client.
    client = api_keys_v2.ApiKeysClient()

    # Restrict the API key usage to specific websites by adding them to the list of allowed_referrers.
    browser_key_restrictions = api_keys_v2.BrowserKeyRestrictions()
    browser_key_restrictions.allowed_referrers = ["www.example.com/*"]

    # Set the API restriction.
    # For more information on API key restriction, see:
    # https://cloud.google.com/docs/authentication/api-keys
    restrictions = api_keys_v2.Restrictions()
    restrictions.browser_key_restrictions = browser_key_restrictions

    key = api_keys_v2.Key()
    key.name = f"projects/{project_id}/locations/global/keys/{key_id}"
    key.restrictions = restrictions

    # Initialize request and set arguments.
    request = api_keys_v2.UpdateKeyRequest()
    request.key = key
    request.update_mask = "restrictions"

    # Make the request and wait for the operation to complete.
    response = client.update_key(request=request).result()

    print(f"Successfully updated the API key: {response.name}")
    # Use response.key_string to authenticate.
    return response

REST

1. Get the ID of the key that you want to restrict.

   The ID is not the same as the display name or the key string. You can get the ID by using the keys.list method. The ID is listed in the uid field of the response.

   Replace PROJECT_ID with your Google Cloud project ID or name.

   curl -X GET \
   -H "Authorization: Bearer $(gcloud auth print-access-token)" \
   "https://apikeys.googleapis.com/v2/projects/PROJECT_ID/locations/global/keys/"

2. Use the keys.patch method to add HTTP referrer restrictions to the API key.

   This request returns a long-running operation; you must poll the operation to know when the operation completes and get the operation status.

   Replace the following values:

   • ALLOWED_REFERRER_1: Your HTTP referrer restriction.

     You can add as many restrictions as needed; use commas to separate the restrictions. You must provide all referrer restrictions with the request; the referrer restrictions provided replace any existing referrer restrictions on the key.

   • PROJECT_ID: Your Google Cloud project ID or name.

   • KEY_ID: The ID of the key that you want to restrict.

   curl -X PATCH \
   -H "Authorization: Bearer $(gcloud auth print-access-token)" \
   -H "Content-Type: application/json; charset=utf-8" \
   --data '{
   "restrictions" : {
   "browserKeyRestrictions": {
     "allowedReferrers": ["ALLOWED_REFERRER_1"]
   }
   }
   }' \
   "https://apikeys.googleapis.com/v2/projects/PROJECT_ID/locations/global/keys/KEY_ID?updateMask=restrictions"

For more information about adding HTTP referrer restrictions to a key using the REST API, see Adding browser restrictions in the API Keys API documentation.

IP Addresses

You can specify one or more IP addresses of the callers, such as a web server or cron job, that are allowed to use your API key. You can specify the IP addresses in any of the following formats:

• IPv4 (198.51.100.1)
• IPv6 (2001:db8::1)
• A subnet using CIDR notation (198.51.100.0/24, 2001:db8::/64)

Using localhost is not supported for server restrictions.

To restrict your API key to specific IP addresses, use one of the following options:

Console

1. In the Google Cloud console, go to the Credentials page:

   Go to Credentials

2. Click the name of the API key that you want to restrict.

3. In the Application restrictions section, select IP addresses.

4. For each IP address that you want to add, click Add an item, enter the address, and click Done.

5. Click Save to save your changes and return to the API key list.

gcloud

1. Get the ID of the key that you want to restrict.

   The ID is not the same as the display name or the key string. You can get the ID by using the gcloud services api-keys list command to list the keys in your project.

2. Use the gcloud services api-keys update command to add server (IP address) restrictions to an API key.

   Replace the following values:

   • KEY_ID: The ID of the key that you want to restrict.

   • ALLOWED_IP_ADDR_1: Your allowed IP address.

     You can add as many IP addresses as needed; use commas to separate the addresses.

   gcloud services api-keys update KEY_ID \
   --allowed-ips="ALLOWED_IP_ADDR_1"

Java

To run this sample, you must install the google-cloud-apikeys client library.

import com.google.api.apikeys.v2.ApiKeysClient;
import com.google.api.apikeys.v2.Key;
import com.google.api.apikeys.v2.Restrictions;
import com.google.api.apikeys.v2.ServerKeyRestrictions;
import com.google.api.apikeys.v2.UpdateKeyRequest;
import com.google.protobuf.FieldMask;
import java.io.IOException;
import java.util.Arrays;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

public class RestrictApiKeyServer {

  public static void main(String[] args)
      throws IOException, ExecutionException, InterruptedException, TimeoutException {
    // TODO(Developer): Before running this sample,
    //  1. Replace the variable(s) below.
    String projectId = "GOOGLE_CLOUD_PROJECT_ID";

    // ID of the key to restrict. This ID is auto-created during key creation.
    // This is different from the key string. To obtain the key_id,
    // you can also use the lookup api: client.lookupKey()
    String keyId = "key_id";

    restrictApiKeyServer(projectId, keyId);
  }

  // Restricts the API key based on IP addresses. You can specify one or more IP addresses
  // of the callers, for example web servers or cron jobs, that are allowed to use your API key.
  public static void restrictApiKeyServer(String projectId, String keyId)
      throws IOException, ExecutionException, InterruptedException, TimeoutException {
    // Initialize client that will be used to send requests. This client only needs to be created
    // once, and can be reused for multiple requests. After completing all of your requests, call
    // the `apiKeysClient.close()` method on the client to safely
    // clean up any remaining background resources.
    try (ApiKeysClient apiKeysClient = ApiKeysClient.create()) {

      // Restrict the API key usage by specifying the IP addresses.
      // You can specify the IP addresses in IPv4 or IPv6 or a subnet using CIDR notation.
      Restrictions restrictions = Restrictions.newBuilder()
          .setServerKeyRestrictions(ServerKeyRestrictions.newBuilder()
              .addAllAllowedIps(Arrays.asList("198.51.100.0/24", "2000:db8::/64"))
              .build())
          .build();

      Key key = Key.newBuilder()
          .setName(String.format("projects/%s/locations/global/keys/%s", projectId, keyId))
          // Set the restriction(s).
          // For more information on API key restriction, see:
          // https://cloud.google.com/docs/authentication/api-keys
          .setRestrictions(restrictions)
          .build();

      // Initialize request and set arguments.
      UpdateKeyRequest updateKeyRequest = UpdateKeyRequest.newBuilder()
          .setKey(key)
          .setUpdateMask(FieldMask.newBuilder().addPaths("restrictions").build())
          .build();

      // Make the request and wait for the operation to complete.
      Key result = apiKeysClient.updateKeyAsync(updateKeyRequest).get(3, TimeUnit.MINUTES);

      // For authenticating with the API key, use the value in "result.getKeyString()".
      System.out.printf("Successfully updated the API key: %s", result.getName());
    }
  }
}

Python

To run this sample, you must install the API Keys client library.

from google.cloud import api_keys_v2
from google.cloud.api_keys_v2 import Key


def restrict_api_key_server(project_id: str, key_id: str) -> Key:
    """
    Restricts the API key based on IP addresses. You can specify one or more IP addresses of the callers,
    for example web servers or cron jobs, that are allowed to use your API key.

    TODO(Developer): Replace the variables before running this sample.

    Args:
        project_id: Google Cloud project id.
        key_id: ID of the key to restrict. This ID is auto-created during key creation.
            This is different from the key string. To obtain the key_id,
            you can also use the lookup api: client.lookup_key()

    Returns:
        response: Returns the updated API Key.
    """

    # Create the API Keys client.
    client = api_keys_v2.ApiKeysClient()

    # Restrict the API key usage by specifying the IP addresses.
    # You can specify the IP addresses in IPv4 or IPv6 or a subnet using CIDR notation.
    server_key_restrictions = api_keys_v2.ServerKeyRestrictions()
    server_key_restrictions.allowed_ips = ["198.51.100.0/24", "2000:db8::/64"]

    # Set the API restriction.
    # For more information on API key restriction, see:
    # https://cloud.google.com/docs/authentication/api-keys
    restrictions = api_keys_v2.Restrictions()
    restrictions.server_key_restrictions = server_key_restrictions

    key = api_keys_v2.Key()
    key.name = f"projects/{project_id}/locations/global/keys/{key_id}"
    key.restrictions = restrictions

    # Initialize request and set arguments.
    request = api_keys_v2.UpdateKeyRequest()
    request.key = key
    request.update_mask = "restrictions"

    # Make the request and wait for the operation to complete.
    response = client.update_key(request=request).result()

    print(f"Successfully updated the API key: {response.name}")
    # Use response.key_string to authenticate.
    return response

REST

1. Get the ID of the key that you want to restrict.

   The ID is not the same as the display name or the key string. You can get the ID by using the keys.list method. The ID is listed in the uid field of the response.

   Replace PROJECT_ID with your Google Cloud project ID or name.

   curl -X GET \
   -H "Authorization: Bearer $(gcloud auth print-access-token)" \
   "https://apikeys.googleapis.com/v2/projects/PROJECT_ID/locations/global/keys/"

2. Use the keys.patch method to add server (IP address) restrictions to an API key.

   This request returns a long-running operation; you must poll the operation to know when the operation completes and get the operation status.

   Replace the following values:

   • ALLOWED_IP_ADDR_1: Your allowed IP address.

     You can add as many IP addresses as needed; use commas to separate the restrictions. You must provide all IP addresses with the request; the referrer restrictions provided replace any existing IP address restrictions on the key.

   • PROJECT_ID: Your Google Cloud project ID or name.

   • KEY_ID: The ID of the key that you want to restrict.

   curl -X PATCH \
   -H "Authorization: Bearer $(gcloud auth print-access-token)" \
   -H "Content-Type: application/json; charset=utf-8" \
   --data '{
   "restrictions" : {
     "serverKeyRestrictions": {
       "allowedIps": ["ALLOWED_IP_ADDR_1"]
     }
   }
   }' \
   "https://apikeys.googleapis.com/v2/projects/PROJECT_ID/locations/global/keys/KEY_ID?updateMask=restrictions"

For more information about adding IP address restrictions to a key using the REST API, see Adding server restrictions in the API Keys API documentation.

Android apps

You can restrict usage of an API key to specific Android apps. You must provide the package name and the 20-byte SHA-1 certificate fingerprint for each app.

When you use the API key in a request, you must specify the package name and certificate fingerprint by using the following HTTP headers:

• X-Android-Package
• X-Android-Cert

Note: Bypassing this restriction is straightforward. If you use this restriction, you should also add API restrictions and monitor usage carefully.

To restrict your API key to one or more Android apps, use one of the following options:

Console

1. In the Google Cloud console, go to the Credentials page:

   Go to Credentials

2. Click the name of the API key that you want to restrict.

3. In the Application restrictions section, select Android apps.

4. For each Android app that you want to add, click Add an item and enter the package name and SHA-1 certificate fingerprint, then click Done.

5. Click Save to save your changes and return to the API key list.

gcloud

1. Get the ID of the key that you want to restrict.

   The ID is not the same as the display name or the key string. You can get the ID by using the gcloud services api-keys list command to list the keys in your project.

2. Use the gcloud services api-keys update command to specify the Android apps that can use an API key.

   Replace the following values:

   • KEY_ID: The ID of the key that you want to restrict.

   • SHA1_FINGERPRINT and PACKAGE_NAME: The app information for an Android app that can use the key.

     You can add as many apps as needed; use additional --allowed-application flags.

   gcloud services api-keys update KEY_ID \
   --allowed-application=sha1_fingerprint=SHA1_FINGERPRINT_1,package_name=PACKAGE_NAME_1 \
   --allowed-application=sha1_fingerprint=SHA1_FINGERPRINT_2,package_name=PACKAGE_NAME_2

Java

To run this sample, you must install the google-cloud-apikeys client library.

import com.google.api.apikeys.v2.AndroidApplication;
import com.google.api.apikeys.v2.AndroidKeyRestrictions;
import com.google.api.apikeys.v2.ApiKeysClient;
import com.google.api.apikeys.v2.Key;
import com.google.api.apikeys.v2.Restrictions;
import com.google.api.apikeys.v2.UpdateKeyRequest;
import com.google.protobuf.FieldMask;
import java.io.IOException;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

public class RestrictApiKeyAndroid {

  public static void main(String[] args)
      throws IOException, ExecutionException, InterruptedException, TimeoutException {
    // TODO(Developer): Before running this sample,
    //  1. Replace the variable(s) below.
    String projectId = "GOOGLE_CLOUD_PROJECT_ID";

    // ID of the key to restrict. This ID is auto-created during key creation.
    // This is different from the key string. To obtain the key_id,
    // you can also use the lookup api: client.lookupKey()
    String keyId = "key_id";

    restrictApiKeyAndroid(projectId, keyId);
  }

  // Restricts an API key based on android applications.
  // Specifies the Android application that can use the key.
  public static void restrictApiKeyAndroid(String projectId, String keyId)
      throws IOException, ExecutionException, InterruptedException, TimeoutException {
    // Initialize client that will be used to send requests. This client only needs to be created
    // once, and can be reused for multiple requests. After completing all of your requests, call
    // the `apiKeysClient.close()` method on the client to safely
    // clean up any remaining background resources.
    try (ApiKeysClient apiKeysClient = ApiKeysClient.create()) {

      // Restrict the API key usage by specifying the allowed android applications.
      Restrictions restrictions = Restrictions.newBuilder()
          .setAndroidKeyRestrictions(AndroidKeyRestrictions.newBuilder()
              .addAllowedApplications(AndroidApplication.newBuilder()
                  // Specify the android application's package name and SHA1 fingerprint.
                  .setPackageName("com.google.appname")
                  .setSha1Fingerprint("0873D391E987982FBBD30873D391E987982FBBD3")
                  .build())
              .build())
          .build();

      Key key = Key.newBuilder()
          .setName(String.format("projects/%s/locations/global/keys/%s", projectId, keyId))
          // Set the restriction(s).
          // For more information on API key restriction, see:
          // https://cloud.google.com/docs/authentication/api-keys
          .setRestrictions(restrictions)
          .build();

      // Initialize request and set arguments.
      UpdateKeyRequest updateKeyRequest = UpdateKeyRequest.newBuilder()
          .setKey(key)
          .setUpdateMask(FieldMask.newBuilder().addPaths("restrictions").build())
          .build();

      // Make the request and wait for the operation to complete.
      Key result = apiKeysClient.updateKeyAsync(updateKeyRequest).get(3, TimeUnit.MINUTES);

      // For authenticating with the API key, use the value in "result.getKeyString()".
      System.out.printf("Successfully updated the API key: %s", result.getName());
    }
  }
}

Python

To run this sample, you must install the API Keys client library.

from google.cloud import api_keys_v2
from google.cloud.api_keys_v2 import Key


def restrict_api_key_android(project_id: str, key_id: str) -> Key:
    """
    Restricts an API key based on android applications.

    Specifies the Android application that can use the key.

    TODO(Developer): Replace the variables before running this sample.

    Args:
        project_id: Google Cloud project id.
        key_id: ID of the key to restrict. This ID is auto-created during key creation.
            This is different from the key string. To obtain the key_id,
            you can also use the lookup api: client.lookup_key()

    Returns:
        response: Returns the updated API Key.
    """

    # Create the API Keys client.
    client = api_keys_v2.ApiKeysClient()

    # Specify the android application's package name and SHA1 fingerprint.
    allowed_application = api_keys_v2.AndroidApplication()
    allowed_application.package_name = "com.google.appname"
    allowed_application.sha1_fingerprint = "0873D391E987982FBBD30873D391E987982FBBD3"

    # Restrict the API key usage by specifying the allowed applications.
    android_key_restriction = api_keys_v2.AndroidKeyRestrictions()
    android_key_restriction.allowed_applications = [allowed_application]

    # Set the restriction(s).
    # For more information on API key restriction, see:
    # https://cloud.google.com/docs/authentication/api-keys
    restrictions = api_keys_v2.Restrictions()
    restrictions.android_key_restrictions = android_key_restriction

    key = api_keys_v2.Key()
    key.name = f"projects/{project_id}/locations/global/keys/{key_id}"
    key.restrictions = restrictions

    # Initialize request and set arguments.
    request = api_keys_v2.UpdateKeyRequest()
    request.key = key
    request.update_mask = "restrictions"

    # Make the request and wait for the operation to complete.
    response = client.update_key(request=request).result()

    print(f"Successfully updated the API key: {response.name}")
    # Use response.key_string to authenticate.
    return response

REST

1. Get the ID of the key that you want to restrict.

   The ID is not the same as the display name or the key string. You can get the ID by using the keys.list method. The ID is listed in the uid field of the response.

   Replace PROJECT_ID with your Google Cloud project ID or name.

   curl -X GET \
   -H "Authorization: Bearer $(gcloud auth print-access-token)" \
   "https://apikeys.googleapis.com/v2/projects/PROJECT_ID/locations/global/keys/"

2. Use the keys.patch method to specify the Android apps that can use an API key.

   This request returns a long-running operation; you must poll the operation to know when the operation completes and get the operation status.

   Replace the following values:

   • SHA1_FINGERPRINT_1 and PACKAGE_NAME_1: The app information for an Android app that can use the key.

     You can add the information for as many apps as needed; use commas to separate the AndroidApplication objects. You must provide all applications with the request; the applications provided replace any existing allowed applications on the key.

   • PROJECT_ID: Your Google Cloud project ID or name.

   • KEY_ID: The ID of the key that you want to restrict.

   curl -X PATCH \
   -H "Authorization: Bearer $(gcloud auth print-access-token)" \
   -H "Content-Type: application/json; charset=utf-8" \
   --data '{
   "restrictions" : {
   "androidKeyRestrictions": {
     "allowedApplications": [
       {
         "sha1Fingerprint": "SHA1_FINGERPRINT_1",
         "packageName": "PACKAGE_NAME_1"
       },
    ]
   }
   }
   }' \
   "https://apikeys.googleapis.com/v2/projects/PROJECT_ID/locations/global/keys/KEY_ID?updateMask=restrictions"

For more information about adding Android app restrictions to a key using the REST API, see Adding Android restrictions in the API Keys API documentation.

iOS apps

You can restrict usage of an API key to specific iOS apps by providing the bundle ID of each app.

When you use the API key in a request, you must specify the bundle ID by using the X-Ios-Bundle-Identifier HTTP header.

Note: Bypassing this restriction is straightforward. If you use this restriction, you should also add API restrictions and monitor usage carefully.

To restrict your API key to one or more iOS apps, use one of the following options:

Console

1. In the Google Cloud console, go to the Credentials page:

   Go to Credentials

2. Click the name of the API key that you want to restrict.

3. In the Application restrictions section, select iOS apps.

4. For each iOS app that you want to add, click Add an item and enter the bundle ID, then click Done.

5. Click Save to save your changes and return to the API key list.

gcloud

1. Get the ID of the key that you want to restrict.

   The ID is not the same as the display name or the key string. You can get the ID by using the gcloud services api-keys list command to list the keys in your project.

2. Use the gcloud services api-keys update method to specify the iOS apps that can use the key.

   Replace the following values:

   • KEY_ID: The ID of the key that you want to restrict.

   • ALLOWED_BUNDLE_ID: The bundle ID of an iOS app that you want to be able to use this API key.

     You can add as many bundle IDs as needed; use commas to separate the IDs.

   gcloud services api-keys update KEY_ID \
   --allowed-bundle-ids=ALLOWED_BUNDLE_ID_1,ALLOWED_BUNDLE_ID_2

Java

To run this sample, you must install the google-cloud-apikeys client library.

import com.google.api.apikeys.v2.ApiKeysClient;
import com.google.api.apikeys.v2.IosKeyRestrictions;
import com.google.api.apikeys.v2.Key;
import com.google.api.apikeys.v2.Restrictions;
import com.google.api.apikeys.v2.UpdateKeyRequest;
import com.google.protobuf.FieldMask;
import java.io.IOException;
import java.util.Arrays;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

public class RestrictApiKeyIos {

  public static void main(String[] args)
      throws IOException, ExecutionException, InterruptedException, TimeoutException {
    // TODO(Developer): Before running this sample,
    //  1. Replace the variable(s) below.
    String projectId = "GOOGLE_CLOUD_PROJECT_ID";

    // ID of the key to restrict. This ID is auto-created during key creation.
    // This is different from the key string. To obtain the key_id,
    // you can also use the lookup api: client.lookupKey()
    String keyId = "key_id";

    restrictApiKeyIos(projectId, keyId);
  }

  // Restricts an API key. You can restrict usage of an API key to specific iOS apps
  // by providing the bundle ID of each app.
  public static void restrictApiKeyIos(String projectId, String keyId)
      throws IOException, ExecutionException, InterruptedException, TimeoutException {
    // Initialize client that will be used to send requests. This client only needs to be created
    // once, and can be reused for multiple requests. After completing all of your requests, call
    // the `apiKeysClient.close()` method on the client to safely
    // clean up any remaining background resources.
    try (ApiKeysClient apiKeysClient = ApiKeysClient.create()) {

      // Restrict the API key usage by specifying the bundle ID(s)
      // of iOS app(s) that can use the key.
      Restrictions restrictions = Restrictions.newBuilder()
          .setIosKeyRestrictions(IosKeyRestrictions.newBuilder()
              .addAllAllowedBundleIds(Arrays.asList("com.google.gmail", "com.google.drive"))
              .build())
          .build();

      Key key = Key.newBuilder()
          .setName(String.format("projects/%s/locations/global/keys/%s", projectId, keyId))
          // Set the restriction(s).
          // For more information on API key restriction, see:
          // https://cloud.google.com/docs/authentication/api-keys
          .setRestrictions(restrictions)
          .build();

      // Initialize request and set arguments.
      UpdateKeyRequest updateKeyRequest = UpdateKeyRequest.newBuilder()
          .setKey(key)
          .setUpdateMask(FieldMask.newBuilder().addPaths("restrictions").build())
          .build();

      // Make the request and wait for the operation to complete.
      Key result = apiKeysClient.updateKeyAsync(updateKeyRequest).get(3, TimeUnit.MINUTES);

      // For authenticating with the API key, use the value in "result.getKeyString()".
      System.out.printf("Successfully updated the API key: %s", result.getName());
    }
  }
}

Python

To run this sample, you must install the API Keys client library.

from google.cloud import api_keys_v2
from google.cloud.api_keys_v2 import Key


def restrict_api_key_ios(project_id: str, key_id: str) -> Key:
    """
    Restricts an API key. You can restrict usage of an API key to specific iOS apps
    by providing the bundle ID of each app.

    TODO(Developer): Replace the variables before running this sample.

    Args:
        project_id: Google Cloud project id.
        key_id: ID of the key to restrict. This ID is auto-created during key creation.
            This is different from the key string. To obtain the key_id,
            you can also use the lookup api: client.lookup_key()

    Returns:
        response: Returns the updated API Key.
    """

    # Create the API Keys client.
    client = api_keys_v2.ApiKeysClient()

    # Restrict the API key usage by specifying the bundle ID(s) of iOS app(s) that can use the key.
    ios_key_restrictions = api_keys_v2.IosKeyRestrictions()
    ios_key_restrictions.allowed_bundle_ids = ["com.google.gmail", "com.google.drive"]

    # Set the API restriction.
    # For more information on API key restriction, see:
    # https://cloud.google.com/docs/authentication/api-keys
    restrictions = api_keys_v2.Restrictions()
    restrictions.ios_key_restrictions = ios_key_restrictions

    key = api_keys_v2.Key()
    key.name = f"projects/{project_id}/locations/global/keys/{key_id}"
    key.restrictions = restrictions

    # Initialize request and set arguments.
    request = api_keys_v2.UpdateKeyRequest()
    request.key = key
    request.update_mask = "restrictions"

    # Make the request and wait for the operation to complete.
    response = client.update_key(request=request).result()

    print(f"Successfully updated the API key: {response.name}")
    # Use response.key_string to authenticate.
    return response

REST

1. Get the ID of the key that you want to restrict.

   The ID is not the same as the display name or the key string. You can get the ID by using the keys.list method. The ID is listed in the uid field of the response.

   Replace PROJECT_ID with your Google Cloud project ID or name.

   curl -X GET \
   -H "Authorization: Bearer $(gcloud auth print-access-token)" \
   "https://apikeys.googleapis.com/v2/projects/PROJECT_ID/locations/global/keys/"

2. Use the keys.patch method to specify the iOS apps that can use an API key.

   This request returns a long-running operation; you must poll the operation to know when the operation completes and get the operation status.

   Replace the following values:

   • ALLOWED_BUNDLE_ID: The bundle ID of an iOS app that can use the key.

     You can add the information for as many apps as needed; use commas to separate the bundle IDs. You must provide all bundle IDs with the request; the bundle IDs provided replace any existing allowed applications on the key.

   • PROJECT_ID: Your Google Cloud project ID or name.

   • KEY_ID: The ID of the key that you want to restrict.

   curl -X PATCH \
   -H "Authorization: Bearer $(gcloud auth print-access-token)" \
   -H "Content-Type: application/json; charset=utf-8" \
   --data '{
   "restrictions" : {
   "iosKeyRestrictions": {
     "allowedBundleIds": ["ALLOWED_BUNDLE_ID_1","ALLOWED_BUNDLE_ID_2"]
   }
   }
   }' \
   "https://apikeys.googleapis.com/v2/projects/PROJECT_ID/locations/global/keys/KEY_ID?updateMask=restrictions"

For more information about adding iOS app restrictions to a key using the REST API, see Adding iOS restrictions in the API Keys API documentation.

Add API restrictions

API restrictions specify which APIs can be called using the API key.

Note: Before you can specify an API for an API restriction, the API must be enabled for your project. To enable an API, go to the API dashboard.

To add API restrictions, use one of the following options:

Console

1. In the Google Cloud console, go to the Credentials page:

   Go to Credentials

2. Click the name of the API key that you want to restrict.

3. In the API restrictions section, click Restrict key.

4. Select all APIs that your API key will be used to access.

5. Click Save to save your changes and return to the API key list.

gcloud

1. Get the ID of the key that you want to restrict.

   The ID is not the same as the display name or the key string. You can get the ID by using the gcloud services api-keys list command to list the keys in your project.

2. Use the gcloud services api-keys update command to specify which services an API key can be used to authenticate to.

   Replace the following values:

   • KEY_ID: The ID of the key that you want to restrict.

   • SERVICE_1, SERVICE_2...: The service names of the APIs that the key can be used to access.

     You must provide all service names with the update command; the service names provided replace any existing services on the key.

   You can find the service name by searching for the API on the API dashboard. Service names are strings like bigquery.googleapis.com.

   gcloud services api-keys update KEY_ID \
   --api-target=service=SERVICE_1 --api-target=service=SERVICE_2

Java

To run this sample, you must install the google-cloud-apikeys client library.

import com.google.api.apikeys.v2.ApiKeysClient;
import com.google.api.apikeys.v2.ApiTarget;
import com.google.api.apikeys.v2.Key;
import com.google.api.apikeys.v2.Restrictions;
import com.google.api.apikeys.v2.UpdateKeyRequest;
import com.google.protobuf.FieldMask;
import java.io.IOException;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

public class RestrictApiKeyApi {

  public static void main(String[] args)
      throws IOException, ExecutionException, InterruptedException, TimeoutException {
    // TODO(Developer): Before running this sample,
    //  1. Replace the variable(s) below.
    String projectId = "GOOGLE_CLOUD_PROJECT_ID";

    // ID of the key to restrict. This ID is auto-created during key creation.
    // This is different from the key string. To obtain the key_id,
    // you can also use the lookup api: client.lookupKey()
    String keyId = "key_id";

    restrictApiKeyApi(projectId, keyId);
  }

  // Restricts an API key. Restrictions specify which APIs can be called using the API key.
  public static void restrictApiKeyApi(String projectId, String keyId)
      throws IOException, ExecutionException, InterruptedException, TimeoutException {
    // Initialize client that will be used to send requests. This client only needs to be created
    // once, and can be reused for multiple requests. After completing all of your requests, call
    // the `apiKeysClient.close()` method on the client to safely
    // clean up any remaining background resources.
    try (ApiKeysClient apiKeysClient = ApiKeysClient.create()) {

      // Restrict the API key usage by specifying the target service and methods.
      // The API key can only be used to authenticate the specified methods in the service.
      Restrictions restrictions = Restrictions.newBuilder()
          .addApiTargets(ApiTarget.newBuilder()
              .setService("translate.googleapis.com")
              .addMethods("translate.googleapis.com.TranslateText")
              .build())
          .build();

      Key key = Key.newBuilder()
          .setName(String.format("projects/%s/locations/global/keys/%s", projectId, keyId))
          // Set the restriction(s).
          // For more information on API key restriction, see:
          // https://cloud.google.com/docs/authentication/api-keys
          .setRestrictions(restrictions)
          .build();

      // Initialize request and set arguments.
      UpdateKeyRequest updateKeyRequest = UpdateKeyRequest.newBuilder()
          .setKey(key)
          .setUpdateMask(FieldMask.newBuilder().addPaths("restrictions").build())
          .build();

      // Make the request and wait for the operation to complete.
      Key result = apiKeysClient.updateKeyAsync(updateKeyRequest).get(3, TimeUnit.MINUTES);

      // For authenticating with the API key, use the value in "result.getKeyString()".
      System.out.printf("Successfully updated the API key: %s", result.getName());
    }
  }
}

Python

To run this sample, you must install the API Keys client library.

from google.cloud import api_keys_v2
from google.cloud.api_keys_v2 import Key


def restrict_api_key_api(project_id: str, key_id: str) -> Key:
    """
    Restricts an API key. Restrictions specify which APIs can be called using the API key.

    TODO(Developer): Replace the variables before running the sample.

    Args:
        project_id: Google Cloud project id.
        key_id: ID of the key to restrict. This ID is auto-created during key creation.
            This is different from the key string. To obtain the key_id,
            you can also use the lookup api: client.lookup_key()

    Returns:
        response: Returns the updated API Key.
    """

    # Create the API Keys client.
    client = api_keys_v2.ApiKeysClient()

    # Restrict the API key usage by specifying the target service and methods.
    # The API key can only be used to authenticate the specified methods in the service.
    api_target = api_keys_v2.ApiTarget()
    api_target.service = "translate.googleapis.com"
    api_target.methods = ["transate.googleapis.com.TranslateText"]

    # Set the API restriction(s).
    # For more information on API key restriction, see:
    # https://cloud.google.com/docs/authentication/api-keys
    restrictions = api_keys_v2.Restrictions()
    restrictions.api_targets = [api_target]

    key = api_keys_v2.Key()
    key.name = f"projects/{project_id}/locations/global/keys/{key_id}"
    key.restrictions = restrictions

    # Initialize request and set arguments.
    request = api_keys_v2.UpdateKeyRequest()
    request.key = key
    request.update_mask = "restrictions"

    # Make the request and wait for the operation to complete.
    response = client.update_key(request=request).result()

    print(f"Successfully updated the API key: {response.name}")
    # Use response.key_string to authenticate.
    return response

REST

1. Get the ID of the key that you want to restrict.

   The ID is not the same as the display name or the key string. You can get the ID by using the keys.list method. The ID is listed in the uid field of the response.

   Replace PROJECT_ID with your Google Cloud project ID or name.

   curl -X GET \
   -H "Authorization: Bearer $(gcloud auth print-access-token)" \
   "https://apikeys.googleapis.com/v2/projects/PROJECT_ID/locations/global/keys/"

2. Use the keys.patch method to specify which services an API key can be used to authenticate to.

   This request returns a long-running operation; you must poll the operation to know when the operation completes and get the operation status.

   Replace the following values:

   • SERVICE_1, SERVICE_2...: The service names of the APIs that the key can be used to access.

     You must provide all service names with the request; the service names provided replace any existing services on the key.

     You can find the service name by searching for the API on the API dashboard. Service names are strings like bigquery.googleapis.com.

   • PROJECT_ID: Your Google Cloud project ID or name.

   • KEY_ID: The ID of the key that you want to restrict.

   curl -X PATCH \
   -H "Authorization: Bearer $(gcloud auth print-access-token)" \
   -H "Content-Type: application/json; charset=utf-8" \
   --data '{
   "restrictions" : {
   "apiTargets": [
     {
       "service": "SERVICE_1"
     },
     {
       "service" : "SERVICE_2"
     },
   ]
   }
   }' \
   "https://apikeys.googleapis.com/v2/projects/PROJECT_ID/locations/global/keys/KEY_ID?updateMask=restrictions"

For more information about adding API restrictions to a key using the REST API, see Adding API restrictions in the API Keys API documentation.

Get project information from a key string

You can determine which Google Cloud project an API key is associated with from its string.

Replace KEY_STRING with the key string you need project information for.

gcloud

You use the gcloud services api-keys lookup command to get the project ID from a key string.

 gcloud services api-keys lookup KEY_STRING
 

Java

To run this sample, you must install the google-cloud-apikeys client library.

import com.google.api.apikeys.v2.ApiKeysClient;
import com.google.api.apikeys.v2.LookupKeyRequest;
import com.google.api.apikeys.v2.LookupKeyResponse;
import java.io.IOException;

public class LookupApiKey {

  public static void main(String[] args) throws IOException {
    // TODO(Developer): Before running this sample,
    //  1. Replace the variable(s) below.
    //  2. Set up ADC as described in https://cloud.google.com/docs/authentication/external/set-up-adc
    //  3. Make sure you have the necessary permission to view API keys.
    // API key string to retrieve the API key name.
    String apiKeyString = "API_KEY_STRING";

    lookupApiKey(apiKeyString);
  }

  // Retrieves name (full path) of an API key using the API key string.
  public static void lookupApiKey(String apiKeyString) throws IOException {
    // Initialize client that will be used to send requests. This client only needs to be created
    // once, and can be reused for multiple requests. After completing all of your requests, call
    // the `apiKeysClient.close()` method on the client to safely
    // clean up any remaining background resources.
    try (ApiKeysClient apiKeysClient = ApiKeysClient.create()) {

      // Initialize the lookup request and set the API key string.
      LookupKeyRequest lookupKeyRequest = LookupKeyRequest.newBuilder()
          .setKeyString(apiKeyString)
          .build();

      // Make the request and obtain the response.
      LookupKeyResponse response = apiKeysClient.lookupKey(lookupKeyRequest);

      System.out.printf("Successfully retrieved the API key name: %s", response.getName());
    }
  }
}

Python

To run this sample, you must install the API Keys client library.

from google.cloud import api_keys_v2


def lookup_api_key(api_key_string: str) -> None:
    """
    Retrieves name (full path) of an API key using the API key string.

    TODO(Developer):
    1. Before running this sample,
      set up ADC as described in https://cloud.google.com/docs/authentication/external/set-up-adc
    2. Make sure you have the necessary permission to view API keys.

    Args:
        api_key_string: API key string to retrieve the API key name.
    """

    # Create the API Keys client.
    client = api_keys_v2.ApiKeysClient()

    # Initialize the lookup request and set the API key string.
    lookup_key_request = api_keys_v2.LookupKeyRequest(
        key_string=api_key_string,
        # Optionally, you can also set the etag (version).
        # etag=etag,
    )

    # Make the request and obtain the response.
    lookup_key_response = client.lookup_key(lookup_key_request)

    print(f"Successfully retrieved the API key name: {lookup_key_response.name}")

REST

You use the lookupKey method to get the project ID from a key string.

curl -X GET \
-H "Authorization: Bearer $(gcloud auth print-access-token)" \
-H "Content-Type: application/json; charset=utf-8" \
"https://apikeys.googleapis.com/v2/keys:lookupKey?keyString=KEY_STRING"

Undelete an API key

If you delete an API key by mistake, you can undelete (restore) that key within 30 days of deleting the key. After 30 days, you cannot undelete the API key.

Console

1. In the Google Cloud console, go to the Credentials page:

   Go to Credentials

2. Click Restore deleted credentials.

3. Find the deleted API key that you want to undelete, and click Restore.

   Undeleting an API key may take a few minutes to propagate. After propagation, the undeleted API key is displayed in the API keys list.

gcloud

1. Get the ID of the key that you want to undelete.

   The ID is not the same as the display name or the key string. You can get the ID by using the gcloud services api-keys list --show-deleted command to list the deleted keys in your project.

2. Use the gcloud services api-keys undelete command to undelete an API key.

   gcloud services api-keys undelete KEY_ID

   Replace the following values:

   • KEY_ID: The ID of the key that you want to undelete.

REST

1. Get the ID of the key that you want to undelete.

   The ID is not the same as the display name or the key string. You can get the ID by using the keys.list method, with the showDeleted query parameter set to true. The key ID is listed in the uid field of the response.

   Replace PROJECT_ID with your Google Cloud project ID or name.

   curl -X GET \
   -H "Authorization: Bearer $(gcloud auth print-access-token)" \
   "https://apikeys.googleapis.com/v2/projects/PROJECT_ID/locations/global/keys?showDeleted=true"

2. Use the undelete method to undelete the API key.

   curl -X POST \
   -H "Authorization: Bearer $(gcloud auth print-access-token)" \
   -H "Content-Type: application/json; charset=utf-8" \
   "https://apikeys.googleapis.com/v2/projects/PROJECT_ID/locations/global/keys/KEY_ID:undelete"

   This request returns a long-running operation; you must poll the operation to know when the operation completes and get the operation status.

   Replace the following values:

   • PROJECT_ID: Your Google Cloud project ID or name.
   • KEY_ID: The ID of the key that you want to restrict.

Poll long-running operations

API Keys API methods use long-running operations. If you use the REST API to create and manage API keys, an operation object is returned from the initial method request. You use the operation name to poll the long-running operation. When the long-running request completes, polling the operation returns the data from the long-running request.

To poll a long-running API Keys API operation, you use the operations.get method.

Replace OPERATION_NAME with the operation name returned by the long-running operation. For example, operations/akmf.p7-358517206116-cd10a88a-7740-4403-a8fd-979f3bd7fe1c.

curl -X GET \
    -H "Authorization: Bearer $(gcloud auth print-access-token)" \
    -H "Content-Type: application/json; charset=utf-8" \
    "https://apikeys.googleapis.com/v2/OPERATION_NAME"

Limits on API keys

You can create up to 300 API keys per project. This limit is a system limit, and cannot be changed using a quota increase request.

If more API keys are needed, you must use more than one project.

What's next

• Learn about best practices for keeping your API keys secure.
• Learn more about the API Keys API.