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The Model Context Protocol ecosystem, verified

Current spec 2026-07-28

mcp-server

Earlier Revision Publisher unverified Confidence: Good (0.85)

mcp-server is an MCP server published by configcat, 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 mcp-server support the current MCP specification (2026-07-28)?

Not yet confirmed. mcp-server 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 mcp-server a first-party (official) MCP server?

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

How do I connect to mcp-server?

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

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

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

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

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

When were mcp-server's facts last verified?

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

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Which MCP spec revisions does mcp-server support?

mcp-server 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 mcp-server?

Ranked #304 in The MCP 500 with Adoption Index 48.68 (snapshot , methodology v1).

Measurement Value Source
Official MCP Registry yes API ·
Docker MCP Catalog no API ·
npm downloads (weekly) 791 API ·
GitHub stars 17 API ·
GitHub forks 3 API ·
Last push 2026-09-10T10:43:47Z API ·
Repository archived no API ·

Repository and package signals for mcp-server

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

Created
Open issues
1
Primary language
TypeScript
License (repository)
MIT
Continuous integration
Present
Tests
Present
Security policy
None

Declared topics: configcat, feature-flags, feature-toggle, mcp-server, modelcontextprotocol — author-declared on the repository, not our taxonomy.

Package (npm) as of

Latest version
0.1.8
Last published
First published
Releases
7
License (package)
MIT
Maintainers
4
Direct dependencies
4
Unpacked size
151 KB
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.configcat/mcp-server at version 0.1.3 - lists package npm:@configcat/mcp-server and repository https://github.com/configcat/mcp-server - accessed
  2. npm registry metadata for @configcat/mcp-server at published version 0.1.8, retrieved 2026-08-20 - declares a dependency on @modelcontextprotocol/sdk, which resolves to @modelcontextprotocol/sdk@1.30.0 - accessed
  3. Published artifact of @modelcontextprotocol/sdk@1.30.0, 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