Hi all,

I have created a service for OAuth token generation in IBM API Connect. I have also configured an external URL in the OAuth flow, and I'm setting metadata values from this external call.

I can see the metadata is properly set and available during token introspection.

Now, I want to conditionally set the X-API-OAUTH-METADATA-FOR-ACCESSTOKEN header based on custom parameter values passed during the token generation request.

Is it possible to read these custom values (e.g., department, user type, etc.) and dynamically set the metadata header value before issuing the access token?
Where should this logic be handled – in the mapping rule, GatewayScript, or any other recommended method?

Any help or direction would be greatly appreciated. Thank you!