[[["わかりやすい","easyToUnderstand","thumb-up"],["問題の解決に役立った","solvedMyProblem","thumb-up"],["その他","otherUp","thumb-up"]],[["わかりにくい","hardToUnderstand","thumb-down"],["情報またはサンプルコードが不正確","incorrectInformationOrSampleCode","thumb-down"],["必要な情報 / サンプルがない","missingTheInformationSamplesINeed","thumb-down"],["翻訳に関する問題","translationIssue","thumb-down"],["その他","otherDown","thumb-down"]],["最終更新日 2025-09-04 UTC。"],[[["\u003cp\u003eApp Engine allows the use of third-party services for email, SMS, and phone communication, with providers such as Mailgun, Mailjet, SendGrid, and Twilio.\u003c/p\u003e\n"],["\u003cp\u003eMailgun, Mailjet, and SendGrid are third-party email services that offer free quotas and provide RESTful APIs and client libraries to App Engine users.\u003c/p\u003e\n"],["\u003cp\u003eTwilio provides SMS, voice, and VoIP services via TwiML, RESTful API, and SDKs, allowing developers to integrate these features into their App Engine applications.\u003c/p\u003e\n"],["\u003cp\u003eClient libraries from these third-party services can be added to an App Engine app as dependencies.\u003c/p\u003e\n"],["\u003cp\u003eAPI keys from these third-party services should be stored securely using methods such as the Secret Manager or Cloud Key Management Service, or in the app.yaml file's environment variables for non-production environments.\u003c/p\u003e\n"]]],[],null,["# Sending messages with third-party services\n\n\u003cbr /\u003e\n\n\u003cbr /\u003e\n\n\u003cbr /\u003e\n\n\u003cbr /\u003e\n\n\u003cbr /\u003e\n\n\u003cbr /\u003e\n\nApp Engine apps can use third-party companies to send email, SMS messages,\nor make and receive phone calls. For example, you might send email to confirm\nbusiness transactions, confirm the creation of user accounts, or send marketing\ncommunications.\n\nThis page lists some examples of companies that provide communication services\nand client libraries for App Engine apps.\n| **Note:** The services offered by these third-party companies are not covered by the [App Engine Service Level Agreement](/appengine/sla).\n\nMailgun\n-------\n\n[Mailgun](https://www.mailgun.com/) provides\nboth RESTful APIs and client libraries for sending email, along with a free\nquota for all users. See the monthly pricing calculator on\n[the sign up page](http://www.mailgun.com/google)\nfor pricing on additional messages and volume discounts.\n\nLearn more about Mailgun:\n\n- [Mailgun developer documentation](https://documentation.mailgun.com)\n- [Mailgun client libraries](https://documentation.mailgun.com/en/latest/libraries.html#libraries)\n\nMailjet\n-------\n\n[Mailjet](https://www.mailjet.com/google/?p=google)\nis a global email service that offers a free quota for App Engine users.\nTo take advantage of this offer, click the following link to\n[Create a Mailjet account](https://www.mailjet.com/google/?p=google).\n\nLearn more about Mailjet:\n\n- [Mailjet developer documentation](https://dev.mailjet.com/email/guides/getting-started/)\n- [Mailjet client libraries](https://dev.mailjet.com/email/guides/libraries/)\n\nSendGrid\n--------\n\nYou can use [SendGrid](https://sendgrid.com/)\nto power your emails on App Engine. SendGrid can improve your\ndeliverability and provide transparency into what actually happens to those\nemails your app sends. You can see statistics on opens, clicks, unsubscribes,\nspam reports and more with the SendGrid interface or its API.\n\nApp Engine customers can take advantage of a free quota by signing up\nfor the [SendGrid Email API plan](https://console.cloud.google.com/launcher/details/sendgrid-app/sendgrid-email) through the Google Cloud console. Note that\nGoogle is compensated for customers who sign up for a paid account.\n\nLearn more about SendGrid:\n\n- [SendGrid developer documentation](https://sendgrid.com/docs/for-developers/)\n- [SendGrid client libraries](https://sendgrid.com/docs/Integrate/libraries.html)\n\nSMS and Voice Services via Twilio\n---------------------------------\n\nYou can use Twilio to embed voice, VoIP, and messaging into applications. The\nTwilio platform consists of the [Twilio Markup Language (TwiML)](http://www.twilio.com/docs/api/twiml),\na [RESTful API](http://www.twilio.com/docs/api/rest),\nand VoIP SDKs for web browsers, Android, and iOS.\n\nLearn more about Twilio:\n\n- [Twilio developer documentation](https://www.twilio.com/docs/)\n- [Twilio client libraries](http://www.twilio.com/docs/libraries)\n\nAdding client libraries and third-party API keys to your app\n------------------------------------------------------------\n\nTo make client libraries available in your App Engine development\nand deployment environments, specify the library as a dependency.\nFor example, to specify dependencies for the Node.js runtime,\nsee [here](/appengine/docs/flexible/nodejs/specifying-dependencies).\n\nMost third party services use API keys to authenticate your app. You generate\nthe keys on the third-party's site. To use the third-party API keys in your app:\n\n1. Store the API keys in the [Secret Manager](/secret-manager/docs/overview) and\n [fetch the key securely](/secret-manager/docs/create-secret-quickstart) at\n instance start time.\n\n2. Encrypt the key with [Cloud Key Management Service](/kms/docs/key-management-service), store\n the encrypted key in an environment variable, and\n [decrypt it programmatically](/kms/docs/encrypt-decrypt) at instance start time.\n\n3. For non-production environments, you can store the key itself in an\n environment variable. Note that anyone with access to your `app.yaml` file\n can also access your key.\n\nTo learn about the advantages of each\napproach, see [Choosing a secret management\nsolution](/kms/docs/secret-management#choosing_a_secret_management_solution)\n\nTo store the key, or encrypted key value in an environment variable:\n\n1. Add the key or encrypted key value to the environment variables section in\n your app's `app.yaml` file.\n\n For example: \n\n env_variables:\n EMAIL_API_KEY: key-from-third-party OR encrypted-key\n\n If you are using the .NET runtime, add the key to the configuration variables in your app's `appsettings.json` file. If you\n are using the Node.js runtime, add the key to the configuration variables in your app's environment variables section in your app's `app.flexible.yaml` file.\n\n2. In your app's code, retrieve the key or encrypted key from your environment\n variables.\n\n For example, if you are using the Python runtime: \n\n EMAIL_API_KEY = os.environ['EMAIL_API_KEY']\n\n3. Pass the key as required by the third party's API. Ensure you\n [decrypt the key](/kms/docs/encrypt-decrypt) if you encrypted it previously."]]
