ChatGPT or Claude connector not working? Run these six checks.
If your AI assistant cannot reach FoxEra Calls, the problem is almost always one of six things. Work through this checklist before raising a support request.
Check 1: You are using the right URL
The connector URL for FoxEra Calls is:
https://app.foxera.co.uk/mcp
Common mistakes include leaving off the /mcp path, using http instead of https, or copying a stale URL from an older guide. If you see a connection refused or 404 error, check the URL character by character.
This URL works for any assistant that supports remote MCP servers, including ChatGPT, Claude, Cursor and others. The developer guide has step-by-step screenshots for each assistant.
Check 2: You signed in and pressed Allow
When you add the connector, your assistant opens a sign-in page for FoxEra Calls. You need to:
- Sign in with your FoxEra account email and password.
- Press Allow on the authorisation screen to grant the assistant access to your workspace.
If you closed the sign-in window before pressing Allow, or if the page timed out, the connector will show as added but will have no tools available. Remove the connector and add it again, making sure you complete both steps.
Check 3: Developer mode is enabled where required
Some assistants require you to enable a developer or advanced mode before they will show custom connectors. For example:
- ChatGPT — custom connectors and MCP servers may require a ChatGPT Plus or Team plan. Check your plan settings.
- Claude — the remote MCP feature may need to be enabled in your account or organisation settings.
- Cursor — MCP servers are configured in the settings file. Make sure the entry is saved and the editor is restarted.
If your assistant shows the connector option but lists zero tools after connecting, this is the most likely cause. Check the assistant's own documentation for MCP or custom connector requirements.
Check 4: You changed your password recently
Changing your FoxEra Calls password disconnects every connected assistant immediately. This is a security feature — it ensures that no assistant keeps access after a password change.
If your connector stopped working after a password change, remove the connector from your assistant and add it again using the same URL. Sign in with your new password and press Allow.
The same applies if your account was locked and unlocked, or if you reset your password via email. Any event that invalidates your session also invalidates every assistant connection.
Check 5: Your API key was revoked
If you are connecting via the REST API rather than the MCP server, your bearer key (fxk_...) may have been revoked. This happens when:
- You or another workspace member revoked it from the developer settings.
- You generated a new key and the old one was automatically replaced.
Check your developer settings for active keys. If no key is listed, generate a new one and update your integration. The API documentation explains how keys work.
If you use the MCP connector (not a bearer key), this check does not apply — the connector uses OAuth, not a static key.
Check 6: Your assistant does not support remote MCP
Not every AI assistant supports remote MCP servers yet. If your assistant has no option to add a custom connector or remote MCP server, it cannot connect to FoxEra Calls via the MCP route.
Your alternatives in that case:
- Use the REST API with a bearer key. Any tool that can make HTTP requests can call the API. The OpenAPI 3.1 spec documents every endpoint.
- Use a GPT Action if you are on ChatGPT — import the OpenAPI spec URL directly.
- Switch assistants — ChatGPT, Claude and Cursor all support the connector today.
The MCP vs API key comparison explains which method suits your setup.
Frequently asked questions
Why does my connector show zero tools?
You probably closed the sign-in window before pressing Allow, or your assistant requires developer mode to be enabled. Remove the connector, add it again with the URL https://app.foxera.co.uk/mcp, sign in fully and press Allow.
Does changing my password disconnect my AI assistant?
Yes. Changing your FoxEra password invalidates every connected assistant session. Reconnect by removing and re-adding the connector, then sign in with your new password.
Can I use the API if my assistant does not support MCP?
Yes. The REST API uses bearer keys and works from any HTTP client, automation platform or GPT Action. The OpenAPI 3.1 spec is at https://app.foxera.co.uk/api/public/openapi.json.