Frame.io API v4 OAuth2 Integration Returning 401 Despite Valid Access Token

Hi everyone,

I’m trying to integrate the Frame.io v4 API via Adobe OAuth2 (IMS). I’ve successfully:

• Created the OAuth Web App in Adobe Developer Console

• Added Frame.io API service

• Got correct client_id, client_secret, redirect URIs (escaped properly)

• Successfully obtained authorization_code

• Exchanged for access_token and refresh_token successfully

Problem:
When I call https://api.frame.io/v4/accounts with the token (properly sent in Authorization header as Bearer [token]), I always receive:

401 Unauthorized - Invalid or missing authorization token

The Adobe OAuth flow completes fine. Frame.io support has already linked my Adobe ID on the backend. My Adobe ID logs into Frame.io just fine via browser.

Main question:
What additional step is needed for the token to be recognized by Frame.io?
Is this workspace linkage? scopes? production status? developer console config?

If anyone has successfully made this work, I’d appreciate any guidance on what I’m missing to make Frame.io accept my valid Adobe token.

Thanks!