Specify a regional endpoint

Speech-to-Text offers US and EU regional API endpoints. If you use a regional endpoint, your data at-rest and in-use will stay within the continental boundaries of Europe or the USA. Specifying an endpoint is important if your data's location must be controlled in order to comply with local regulatory requirements. There is no functional change to the behavior of the API.

When you use a regional endpoint, make sure to include the matching us or eu location in the parent string. See the RecognitionConfig documentation for more information about configuring the recognition request body.

Protocol

To perform speech recognition using a regional endpoint, run the applicable command in the table below to configure the correct endpoint:

Multi-region	Endpoint override
EU	$ export CLOUD_SPEECH_ENDPOINT=https://eu-speech.googleapis.com
US	$ export CLOUD_SPEECH_ENDPOINT=https://us-speech.googleapis.com

The following code sample demonstrates how to send a recognize request that keeps all data confined to a specified region. You can substitute either the EU or US regional endpoint for the CLOUD_SPEECH_ENDPOINT variable.

$ curl   -H "Content-Type: application/json"  \
         -H  "Authorization: Bearer "$(gcloud auth application-default print-access-token)   \
          $CLOUD_SPEECH_ENDPOINT/v1/speech:recognize \
         --data "{
        'config': {
            'encoding': 'LINEAR16',
            'languageCode': 'en-US'
        },
        'audio': {
            'uri':'gs://speech-samples-00/commercial_mono.wav'
        }
    }"

This example uses an access token for a service account set up for the project using the Google Cloud CLI. For instructions on installing the gcloud CLI, setting up a project with a service account, and obtaining an access token, see the quickstart.

The audio content supplied in the request body is base64-encoded. For more information on how to base64-encode audio, see Base64 Encoding Audio Content. For more information on the content field, see RecognitionAudio.

gcloud CLI

The following commands set a regional endpoint:

Multi-region	Endpoint override
EU	gcloud config set api_endpoint_overrides/speech https://eu-speech.googleapis.com/
US	gcloud config set api_endpoint_overrides/speech https://us-speech.googleapis.com/

After you set the regional endpoint, all data will be confined to the specified region when you send subsequent recognize requests. The following example demonstrates a recognize request.

$ gcloud ml speech recognize gs://cloud-samples-tests/speech/brooklyn.flac \
    --language-code=en-US --log-http

Python

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# Imports the Google Cloud client library
from google.cloud import speech
from google.api_core import client_options

# Instantiates a client


# Pass an additional argument, ClientOptions, to specify the new endpoint.
client_options = client_options.ClientOptions(
    api_endpoint="eu-speech.googleapis.com"
)

client = speech.SpeechClient(client_options=client_options)

# The name of the audio file to transcribe
gcs_uri = "gs://cloud-samples-data/speech/brooklyn_bridge.raw"

audio = speech.RecognitionAudio(uri=gcs_uri)

config = speech.RecognitionConfig(
    encoding=speech.RecognitionConfig.AudioEncoding.LINEAR16,
    sample_rate_hertz=16000,
    language_code="en-US",
)

# Detects speech in the audio file
response = client.recognize(config=config, audio=audio)

for result in response.results:
    print("Transcript: {}".format(result.alternatives[0].transcript))