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The Model Context Protocol ecosystem, verified

Current spec 2026-07-28

calibre-mcp

Earlier Revision Publisher unverified Confidence: Good (0.85)

calibre-mcp is an MCP server published by caelum29, verified on MCP revision 2025-11-25; support for the current revision (2026-07-28) is not yet confirmed. Last verified 2026-08-20.

Does calibre-mcp support the current MCP specification (2026-07-28)?

Not yet confirmed. calibre-mcp is verified on revision 2025-11-25; we have not confirmed support for the current revision (2026-07-28) as of 2026-08-20.

Is calibre-mcp a first-party (official) MCP server?

Undetermined. We have not verified the publisher relationship for calibre-mcp (as of 2026-08-20).

How do I connect to calibre-mcp?

calibre-mcp is available via the package npm:calibre-mcp, the official MCP Registry under io.github.caelum29/calibre-mcp, the source repository at https://github.com/caelum29/calibre-mcp. Authentication: unknown. Transports: stdio.

Does calibre-mcp support MCP revision 2025-11-25?

Yes. calibre-mcp supports MCP revision 2025-11-25 (checked 2026-08-20).

Does calibre-mcp support MCP revision 2026-07-28?

No. calibre-mcp was checked against MCP revision 2026-07-28 and does not support it (checked 2026-08-20).

When were calibre-mcp's facts last verified?

2026-08-20. Each fact on this page links to the sources used to verify it.

Calibre ebook library server: search, read content, curate metadata, semantic search, gated writes.

Which MCP spec revisions does calibre-mcp support?

calibre-mcp has 2 verified spec-support records. Each row lists the revision, the verified status, the evidence URL, and the date that fact was last checked.

Spec revision Status Last checked Evidence
MCP 2025-11-25 Supported Source
MCP 2026-07-28 Not supported Source

How widely adopted is calibre-mcp?

Not ranked in The MCP 500: insufficient public data (coverage floor not met) (snapshot ). The Adoption Index measures public signals only; it says nothing about quality.

Repository and package signals for calibre-mcp

Measured directly from the source registries, not asserted from a document. Each figure carries the date it was read; none of it affects the verified spec status above.

Repository as of

Stars
10
Forks
2
Last pushed
(42 days ago)
Created
Open issues
29
Primary language
TypeScript
License (repository)
MIT
Continuous integration
Present
Tests
Present
Security policy
None

Declared topics: anthropic, calibre, claude, claude-desktop, ebook-management, ebooks, epub, full-text-search, huggingface, hybrid-search, library-management, mcp, mcp-server, model-context-protocol, rag, semantic-search, typescript, vector-search — author-declared on the repository, not our taxonomy.

Package (npm) as of

Latest version
0.7.4
Last published
First published
Releases
25
License (package)
MIT
Maintainers
1
Direct dependencies
5
Unpacked size
1.1 MB
Registry signature
Signed
Build provenance
Attested

How was this verified, and what are the sources?

Verified · method: sdk-protocol-constant · confidence 0.85 (Good).

  1. Official MCP Registry record for io.github.caelum29/calibre-mcp at version 0.7.2 - lists package npm:calibre-mcp and repository https://github.com/caelum29/calibre-mcp - accessed
  2. npm registry metadata for calibre-mcp at published version 0.7.3, retrieved 2026-08-20 - declares a dependency on @modelcontextprotocol/sdk, which resolves to @modelcontextprotocol/sdk@1.29.0 - accessed
  3. Published artifact of @modelcontextprotocol/sdk@1.29.0, retrieved 2026-08-20 - the artifact declares LATEST_PROTOCOL_VERSION 2025-11-25 and carries no 2026-07-28 implementation. Read from the artifact itself, not from release notes - accessed