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HTTP 403: Workspace required. Retrying the same request gives the same error. Errors never cost API credits. Only on the MCP endpoint: the connection has no current workspace, for example after you were removed from it. Call list_workspaces, then switch_workspace. What to do: Choose a workspace with switch_workspace, then retry.
Response
The response is application/problem+json (RFC 9457) and has a Request-Id header with the same request_id. See all errors.