System user token gets 'Invalid OAuth 2.0 Access Token' on Page endpoints

Invalid OAuth 2.0 Access Token on /{page-id}/... calls

Verified 2026-09-04 · Confirmed by 0 builders · Trust 50/100

Cause

Page edges need a Page access token. A system user token is not one, and the error looks like expiry though the token is valid.

Exchange the system user token for the Page token and use that for Page calls.

GET /{page-id}?fields=access_token with the system user token, then call Page edges with the returned access_token

Affects: Graph API, September 2026

Have your agent know this before it fails

claude mcp add --transport http footgun https://getfootgun.com/api/mcp