mcp servers on github
Most of MCP is public code. That is genuinely useful and it also means the ecosystem is full of weekend demos that look identical to production servers from a search result. This page is where things are, and how to tell them apart in about two minutes.
The protocol itself is specified at modelcontextprotocol.io, with the
specification, the SDKs and reference servers published under the
modelcontextprotocol organisation. If you are implementing rather than
installing, start there rather than from a blog post: the SDKs exist for
several languages and the protocol methods are documented rather than inferred.
Vendor servers live with their vendor: Microsoft publishes the Playwright one, the Chrome DevTools team publishes theirs. Playwright MCP vs Chrome DevTools MCP compares those two, which are the largest browser-adjacent ones.
Community servers are everywhere else, and outnumber the first two categories by a wide margin.
Directories aggregate all of the above. They are a decent way to discover and a poor way to judge: listing is not curation, and a directory entry tells you nothing about whether the thing still works.
1. Last commit, not stars. Stars accumulate and never decay; a server with eight thousand stars and no push in a year is a worse dependency than one with two hundred pushed last week. MCP moved fast enough in 2025 and 2026 that a year-old server may not speak the current protocol revision.
2. Who owns it. A server wrapping a product, published by that product's own organisation, is maintained as a side effect of the product existing. A community wrapper is maintained while its author is interested.
3. The tool list, before you register it. tools/list is a protocol
method, so you do not have to read the source to know what a server can do -
any client will enumerate it. Look for tools that write, delete or send, and
decide deliberately rather than discovering later.
4. The size of the surface. Tool descriptions ride in the model's context on every turn, argument schemas included. Measured on our own server: 16 tools, 9,145 characters of description, 3,192 tokens per turn. A server advertising a hundred tools is asking for several times that, forever. How many MCP tools is too many has the arithmetic.
Whether it handles concurrency. Two clients, one server, one profile directory is the most common first-hour failure in the browser category and it has nothing to do with code quality: browser is already in use.
What it does when something fails. A demo returns a stack trace to the model. A production server returns something the model can act on.
Whether its claims were tested. Several servers in the stealth corner advertise capabilities we could not verify, which is stated plainly in stealth MCP servers compared along with what our own does not do.
Where is the official MCP GitHub organisation? Under
modelcontextprotocol, alongside the specification site, with SDKs and
reference servers.
How do I find MCP servers on GitHub? Directories and topic searches both work for discovery. Neither judges: apply the four checks above.
Are community MCP servers safe? They run with whatever access you grant and
expose tools that act. Read tools/list before registering, and prefer
read-only where the choice exists.
Which MCP server should I start with? Depends on the capability you want. How to choose among MCP servers maps the categories.
Is there an official list of MCP servers? The protocol organisation publishes reference servers; third-party directories cover the rest with no curation guarantee.
See also: the MCP server, and MCP tools, resources and prompts for what a server can expose in the first place.
-
The Model Context Protocol documentation, retrieved 2026-09-11, for the protocol operations including
tools/listand for the SDK and reference-server layout. - microsoft/playwright-mcp and ChromeDevTools/chrome-devtools-mcp, retrieved 2026-09-10, as the two vendor-published examples named above.
- This project's own server source, read 2026-09-13, for the tool-surface measurement.
Written while maintaining a community MCP server, which is the category this page tells you to check hardest. The four checks apply to ours: read our tool list before registering it.