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HomeDocsClaude Code CLI 14 Oct 2026
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Connect to external tools with MCP changedagent-sdk/mcp

Nearest release: v2.1.299, published under an hour before upstream edited the page. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.

Upstream edited this page at 14 Oct 2026 01:12 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 14 Oct 2026 01:37 UTC.

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808808A remote server's status can also change after it reports `"connected"`. When the connection to it drops mid-session, Claude Code moves the server back to `"pending"` while [reconnecting](/docs/en/mcp#automatic-reconnection). A later `mcpServerStatus()` call in TypeScript, or [`ClaudeSDKClient.get_mcp_status()`](/docs/en/agent-sdk/python#methods) in Python, can then report `"pending"` for a server you saw connected earlier, with no configuration change on your side.
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810After five reconnection attempts fail, the server reports `"failed"`, or `"needs-auth"` when it needs authorizing again. To retry manually, call [`reconnectMcpServer()`](/docs/en/agent-sdk/typescript#methods) in TypeScript or [`ClaudeSDKClient.reconnect_mcp_server()`](/docs/en/agent-sdk/python#methods) in Python.
810After five reconnection attempts fail, the server reports `"failed"`, or `"needs-auth"` when it needs authorizing again. A `"failed"` HTTP or SSE server can still return to `"connected"` without a call from you, because Claude Code keeps [retrying in the background](/docs/en/mcp#mid-session-drops-of-a-remote-server) after a transient error. To retry manually, call [`reconnectMcpServer()`](/docs/en/agent-sdk/typescript#methods) in TypeScript or [`ClaudeSDKClient.reconnect_mcp_server()`](/docs/en/agent-sdk/python#methods) in Python.
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812812## Troubleshooting
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