Troubleshoot Chat4U MCP
Diagnose MCP availability, OAuth, project selection, entitlement, approval, and connection-revocation problems.
3 min read
- Account menu
- MCP
- Connections
Start with MCP settings to check the connection, then return to the MCP client to retry project selection or an approval route.
Troubleshoot from the connection inward: endpoint, identity, project scope, policy, then approval state. Retrying cannot bypass any of them.
- Finish with
- The boundary that prevented the request and the safe next action
Confirm the connectionCheck the full endpoint, access grant, OAuth account, and workspace membership.
Reconnect with the intended identity when any of these differ.Confirm scope and entitlementUse one eligible project plus its role, MCP access, and Operator Units.
Ask an administrator to correct access; do not borrow a project ID.Read the proposal stateCheck the same action and its status before claiming execution.
Prepare a fresh proposal after expiry, rejection, conflict, or failure.
The client cannot reach Chat4U
Confirm the complete remote URL is https://mcp.chat4u.ai/mcp, not the marketing or dashboard URL. The service may be unavailable even when its documentation is published: MCP is described publicly as a private beta and is separately operated from the dashboard. Ask Chat4U to confirm access rather than repeatedly changing client configuration.
OAuth is denied or the wrong workspace appears
OAuth requires an active Chat4U organization and an active membership in its corresponding workspace. Sign out of the client/browser account you do not intend to use, reconnect, and select the correct organization. An organization that has no active Chat4U workspace, an inactive member, or a disabled client is denied.
A tool is missing or a read is denied
Tool discovery is filtered by role and capability policy. For a project-scoped read, first call chat4u_projects_list, then pass exactly one returned project_id. Check that the selected project has MCP access and remaining Operator Units. A service account is restricted to the project in its claim; it cannot read a different project just because both share an organization.
A change will not execute
The first write only prepares a proposal. Complete the approval presented by the client or open the returned approval route, review the exact action while signed in to Chat4U, and approve it if appropriate. Resume the same tool with the same client_request_id and unchanged arguments when prompted. A new ID, changed values, changed target, expired proposal, rejection, missing authority attestation, or insufficient entitlement requires a new proposal.
Check action state with chat4u_action_get(action_id) before claiming that a change was made. A proposal can be pending, rejected, expired, failed, or executed.
A connection was disconnected
A revoked MCP connection is intentionally rejected even if the client still stores a usable-looking local credential. An authorized administrator must restore it in Dashboard → Settings → MCP and API keys through the normal approval flow. Reconnect after restoration if the client does not recover automatically.
Escalation information
When contacting support, include the client name/version, approximate time, organization and project name (not a credential), tool name, returned error code, and action ID if one exists. Do not include OAuth tokens, API keys, full request bodies, source text, or conversation content.
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