Model Context Protocol Specification
The official specification and documentation for the Model Context Protocol. The source of truth for the protocol that every MCP server in this directory implements. 8,090 GitHub stars and 100 commits on main in the last 30 days.
“The official specification and documentation for the Model Context Protocol. 8,090 stars and 100 commits on main in the last 30 days. The source of truth for the protocol that every MCP server in this directory implements.”
INSTALL THIS SERVER
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4 TOOLS AVAILABLE
OUR ASSESSMENT
- 8,090 GitHub stars.
- 100 commits on main in the last 30 days.
- Official source of truth for the protocol.
- JSON Schema definitions for every message type.
- Active spec evolution.
- Multi-licence repo: new code Apache-2.0, original contributions MIT pending relicensing consent, docs CC-BY-4.0. Track for full Apache-2.0 transition.
- Spec evolving; breaking changes possible between versions.
- Not a runtime; consumers must implement the spec themselves.
No authentication. Specification carries no security risk; servers implementing the spec must address authentication, authorization, and transport security themselves. Licence transition does not affect security posture but matters for downstream distribution.
MCP server authors validating against the spec; tooling builders implementing the protocol in a new language; auditors verifying that an MCP claim matches what the spec actually defines.
TECHNICAL DETAILS
ADOPTION METRICS
// Reading this8,090 stars on modelcontextprotocol/modelcontextprotocol. 100 commits on main in the last 30 days.
// Reading thisPairs with MCP Inspector, MCP Registry, MCP Apps, MCPB, FastMCP, and the language SDKs as the foundational MCP ecosystem layer.
SOURCES & VERIFICATION
We don't take any single directory's word for it. Before scoring, we cross-reference 5 public MCP sources, install the server ourselves against the clients we cover, and record when we last re-verified.
The same server, 5 different lenses. We reconcile these signals into our editorial score, which is why our number sometimes diverges from a directory-aggregate star count.
| Source | Their rating | Their star count | Their downloads | Last synced |
|---|---|---|---|---|
| AutomationSwitch This page | 4.7editorial | 8,090 | — | MAY 12, 2026 |
| PulseMCP | — unrated | unavailable | unavailable | MAY 12, 2026 |
| MCP.so | — unrated | unavailable | unavailable | MAY 12, 2026 |
| Glama | — unrated | unavailable | unavailable | MAY 12, 2026 |
| Smithery | — unrated | unavailable | unavailable | MAY 12, 2026 |
| Official MCP Registry | — unrated | unavailable | unavailable | MAY 12, 2026 |
// Counts are directory-reported; we don't adjust them. Discrepancies usually come from different snapshot times or star-caching.
OTHER DEV TOOLS MCP SERVERS
GitHub
Official GitHub MCP server. 29,469 stars, MIT, 33 commits on main in the last 30 days. Repo, issue, PR, action, and code search tools backed by the GitHub REST + GraphQL APIs.
Playwright
Official Microsoft Playwright MCP server. Browser automation tools (navigate, click, fill, screenshot, evaluate JS, network capture) backed by Playwright. 31,942 stars, 35 commits/30d, Apache-2.0.
FastMCP (Python)
The fast, Pythonic way to build MCP servers and clients. Maintained by PrefectHQ. 25,133 GitHub stars and 92 commits on main in the last 30 days. The dominant Python MCP framework.
Repomix
Pack the entire repository into a single AI-friendly file. Optimised context for feeding codebases to Claude, ChatGPT, Gemini, and others. 24,515 GitHub stars and 100 commits on main in the last 30 days.
Serena
Powerful MCP toolkit for coding. Provides semantic retrieval and editing capabilities, positioned as the IDE for the agent. 23,971 GitHub stars and 100 commits on main in the last 30 days.
MCP Registry
The community-driven registry service for MCP servers, maintained by the Model Context Protocol project. Discover, list, and validate MCP servers from inside agents. 6,781 GitHub stars and 65 commits on main in the last 30 days.
DISCUSS YOUR
MCP REQUIREMENTS.
Evaluating a server, scoping an internal deployment, or working out whether MCP is the right fit at all. Start the conversation and we will point you at the right piece of the ecosystem.