io.github.ni-c/calibreweb-mcp

Calibre-Web

Is the Calibre-Web MCP server down? Yes. It has given no valid answer since 2026-10-20: crashed on start.

Read-only MCP server for Calibre-Web: library search, browsing and covers via the OPDS feed

crashed on start down since 2026-10-20 · probed 2026-11-15 · unchanged since 2026-10-27

MCP error -32000: Connection closed
calibreweb-mcp: CALIBRE_WEB_URL is not a valid URL: a 19-character value that does not look like a URL

Run it: npx -y calibreweb-mcp@0.3.1 (stdio, probed in a container with the network off)
Host: npmjs.com
Repository: https://github.com/ni-c/calibreweb-mcp
Website: https://calibreweb-mcp.ni-c.de
Registry: active, updated 2026-09-07 · registry entry

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Servers that mention calibre.

The result of the latest probe, the tool count and the token cost. The feed has an entry for every probe that changed them.

Stops answering, comes back, tool set or cost changes. One confirmation mail first, a stop link in every mail.

No valid answer since 2026-10-20, in every probe since then.
The process exited on start before it answered initialize. The error output is above.