# Reference MCP servers repo README (modelcontextprotocol/servers)

## Metadata

| Field | Value |
|---|---|
| Institute | Molodetz Institute - Research and Retrieval Division |
| Subject | mcp-client-support |
| Document type | Source Dossier |
| Tier | 1 |
| Source title | Reference MCP servers repo README |
| Source URL | https://github.com/modelcontextprotocol/servers |
| Source publisher / author | MCP maintainers |
| Source type | repository |
| Source date (published) | Unknown, not stated |
| Date researched | 2026-10-18 |
| Researched by | tai (agent), model: Claude Sonnet 5, on behalf of retoor |
| Research method | gather-subagent direct page fetch, parent synthesis from evidence pack |
| Confidence | High |
| Status | Active |

## Summary

README of the official reference-implementations repo: educational examples, explicitly not production-ready. It fixes the canonical distribution commands (`npx -y @modelcontextprotocol/server-memory` for TypeScript, `uvx mcp-server-git` for Python with `uvx` recommended), the Windows rule (wrap `npx` with `cmd /c`, leave `uvx` unchanged), and warns that many originals are now archived with vendor replacements.

## Key findings

- "This repository is a collection of *reference implementations*... intended as... educational examples... not as production-ready solutions."
- Canonical TS distribution: "TypeScript-based servers in this repository can be used directly with `npx`": `npx -y @modelcontextprotocol/server-memory`.
- Canonical Python distribution: "can be used directly with `uvx` or `pip`. `uvx` is recommended": `uvx mcp-server-git`.
- Windows rule: "wrap `npx` with `cmd /c`", i.e. `"command": "cmd"`, `"args": ["/c", "npx", "-y", ...]`; "Leave `uvx` entries unchanged."
- Many originals (GitHub, GitLab, Postgres, SQLite, Slack, Brave Search, Puppeteer...) are now Archived at `servers-archived`, several replaced by official vendor servers (e.g. Brave, Zencoder's Slack): repo READMEs go stale; prefer vendor repos.

## Pros / strengths

- Gives the exact canonical commands for both language tracks plus the Windows `cmd /c` rule, which is directly codeable as generation logic.
- The archived-vs-vendor warning is a real data-quality rule: prefer vendor repos over this repo's READMEs.
- Maintainer-authored, so the "reference, not production" framing is honest scope-setting rather than a gap.

## Cons / limitations / caveats

- No publish date; archival migrations continue, so any server list derived from this repo rots fast.
- Reference-only framing means production run details (auth, secrets, hosting) are out of scope here by design.
- Covers the happy path for TS/Python only; other runtimes get no canonical command.

## Relevance to tai

Grounds the npx/uvx/`cmd /c` command-generation rules and warns that GitHub READMEs may point at archived predecessors. The prefer-vendor-repos rule is a direct input to tai's source-priority ordering.

## Changelog

| Date | Change |
|---|---|
| 2026-10-18 | Initial dossier created. |