External (Third-Party) MCP Servers

Category: AI / Agent Status: stable (v1)

Allows you to connect your own third-party MCP servers (e.g. https://mcp.mdn.mozilla.net/). The AI agent will discover and use the external server's tools alongside the built-in tools.

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What's supported (v1)

Supported	Not supported (yet)
HTTP transport (Streamable HTTP + SSE)	stdio / local-subprocess servers
Bearer token, API key, custom headers	OAuth authorization flows
Per-user servers (each user manages their own)	Admin-global server lists

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How to use

1. Open the AI chat panel.
2. Click the hub button in the left toolbar.
3. Select MCP Servers to open the management dialog.

In the dialog you can:

• Add a server — give it a name, URL, and any required auth headers.
• Test a server — check connectivity and see what tools it provides before saving.
• Edit — change name, URL, headers, or enable/disable.
• Delete — remove a server and its tools.

Headers on edit: leave the header rows empty to keep existing headers. Provide an empty object {} to clear them.

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Lifecycle

• Add — the server is tested, its tools become available to the AI via search_tools.
• Disable / delete — tools disappear from search results.
• Edit — old tools are replaced with the new ones.

Connecting hangs or errors. Use the Test button to verify the URL and headers are correct. Only HTTP transport is supported.