Error message
When this error occurs
Aconnection_id was referenced for a connection that is still pending (the OAuth consent was never completed) or in
error. Only connected connections resolve a bearer token at run time.
How to fix
Complete the OAuth flow — visit the authorize URL returned byPOST /mcp-connections and consent — then confirm
GET /mcp-connections/{id} shows status: connected. If it’s stuck, delete it and reconnect.