Connect a service that isn't in the list changedclaude-tag/admins/connections/custom
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Upstream edited this page at 25 Sep 2026 18:00 UTC, give or take a minute or two: the time comes from Anthropic’s own sitemap rather than from a commit. This site recorded the change at 25 Sep 2026 18:07 UTC.
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102102## Add a custom MCP server
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104The server must be a remote endpoint that Claude can reach at a URL over the internet. An MCP server that runs on a person's machine over stdio, including one packaged as a [desktop extension](/docs/connectors/custom/desktop-extensions), can't be connected, because [sessions](/docs/claude-tag/concepts/glossary#session) run in a cloud sandbox that Anthropic hosts, not on anyone's machine. Host the server as a remote endpoint first, then follow the steps below.
104The server must be a remote endpoint that Claude can reach at a URL over the internet. An MCP server that runs on a person's machine over stdio, including one packaged as a [desktop extension](/docs/connectors/custom/add-unlisted#install-a-local-connector-in-the-desktop-app), can't be connected, because [sessions](/docs/claude-tag/concepts/glossary#session) run in a cloud sandbox that Anthropic hosts, not on anyone's machine. Host the server as a remote endpoint first, then follow the steps below.
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106106To give Claude an MCP server (one you run, or a vendor's hosted MCP endpoint), the pattern is a plugin plus a credential:
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