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A redirect_uri is your app’s callback URL in OAuth. After the user signs in and approves access, COSMIC sends the browser back to this URL with either a code or an OAuth error.

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What to register

Register every callback URL your app will use in the developer portal, including separate values for local, staging, and production when applicable.
The redirect_uri sent in the authorize request and token request must exactly match one registered value, including scheme, host, path, query string, and trailing slash.

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Example client callback

https://partner.example.com/oauth/callback?code=<authorization_code>&state=<state>

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Requirements

  • Use HTTPS callback URLs for non-local environments.
  • Register callback URLs in the developer portal before users run OAuth.
  • Send the same redirect_uri in authorize and token exchange requests.