Exchange client credentials for an access token

Exchanges your connector's OAuth 2.0 client credentials for a bearer access token.

Authenticate with HTTP Basic auth (client_id as the username, client_secret as the password) or send client_id and client_secret in the form body. Then send the returned access_token as Authorization: Bearer <access_token> on every gateway request.

The client-credentials grant does not issue a refresh token — when the token expires, request a new one with the same credentials.

This endpoint is available only for connectors configured for OAuth2. It lives at your connector's root host (https://{connector}.api.maxio.com/oauth/token), not under the /api/v1/billing base path.