Official documentation
Authenticate to Cloud STT
Google Cloud, n.d.
Read the originalRead on October 17, 2026
- What it is
- Google Cloud's authentication page for Speech-to-Text. It explains how client libraries and the REST interface authenticate, using Application Default Credentials, gcloud CLI credentials and service account impersonation.
- How much weight it carries
- Official Google documentation, read on the accessed date. Google revises these pages often, so check the live page before you build. It describes the supported methods and does not say whether an API key can be used for this API.
Facts taken from this source
- Google's Speech-to-Text authentication page says the REST interface can be called with gcloud CLI credentials or Application Default Credentials.
“You can authenticate to the Cloud STT API by using your gcloud CLI credentials or by using Application Default Credentials” (REST section)