> ## Documentation Index
> Fetch the complete documentation index at: https://www.plain.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# startServiceAuthorization

> Begin the OAuth authorization flow for a third-party service integration. Returns connection details including a serviceAuthorizationId and an HMAC digest that must be passed to the authorization URL to securely link the callback back to this workspace. After the user completes the OAuth flow in the third-party service, call completeServiceAuthorization to finalize the connection.