The MCP Server Directory
Every Model Context Protocol server, scored on reliability, documentation, maintenance, and adoption. Independent, opinionated, refreshed daily from the official registry.
What this is
The MCP Server Directory is a live, independently maintained index of Model Context Protocol servers published to the official registry. Each server is scored 0–10 on four dimensions: reliability, documentation quality, maintenance velocity, and adoption. The directory is free, updated daily, and built by MegaOne AI.
Ok
4.3/10JSON5 comment/key shape, body discarded
Jwks Ok
4.3/10JWKS keys array count, body discarded
Jwt Hdr
4.3/10JWT header.payload.sig shape, value discarded
Kcal Kj
4.3/10Kilocalories to kilojoules, number discarded
Keep Alive Ok
4.3/10Keep-Alive timeout band, value discarded
Knot Ms
4.3/10Knots to m/s, number discarded
Ksi Mpa
4.3/10KSI to megapascals, number discarded
N
4.3/10ISO-8859-1 byte count, text discarded
League Km
4.3/10Leagues to kilometers, number discarded
Leef Ok
4.3/10LEEF attr count, line discarded
Link M
4.3/10Survey links to meters, number discarded
Lockfile Ok
4.3/10lockfile entry-band, body discarded
Lpm Lps
4.3/10Liters/min to liters/s, number discarded
Macho Ok
4.3/10Mach-O magic band, bytes discarded
Macroman Ok
4.3/10MacRoman high-byte band, input discarded
Maildir Ok
4.3/10maildir info-flag charset, value discarded
Ok
4.3/10MD2 hex length, input discarded
Ok
4.3/10MD4 hex length, input discarded
Ok
4.3/10MetroHash64 hex length, input discarded
Mic Ok
4.3/10MIC 4-char market code, value discarded
Mil Mm
4.3/10Mils to millimeters, number discarded
Mimepart Ok
4.3/10MIME boundary count, body discarded
Mph Ms
4.3/10Miles/h to m/s, number discarded
Multibase Z
4.3/10multibase z-prefix, value discarded
Multihash Sha
4.3/10multihash sha2 prefix, value discarded
Ok
4.3/10MurmurHash3 hex length, input discarded
Nel Ok
4.3/10NEL JSON key count, body discarded
Netflow Ok
4.3/10NetFlow version nibble, bytes discarded
Nit Cd
4.3/10Nits to cd/m2, number discarded
Nupkg Ok
4.3/10nupkg nuspec id shape, body discarded
Objectid Ts
4.3/10ObjectId 4-byte time prefix, value discarded
Package Ok
4.3/10package.json key count, body discarded
Packer Ok
4.3/10Packer source block count, body discarded
Path N
4.3/10path/case segment count, text discarded
Pcap Ok
4.3/10pcap magic endian, bytes discarded
Pe Ok
4.3/10PE MZ/PE signature, bytes discarded
Permissions Ok
4.3/10Permissions-Policy directive count, value discarded
Pica Mm
4.3/10Picas to millimeters, number discarded
Point Mm
4.3/10Typographic points to millimeters, number discarded
Ok
4.3/10Poly1305 tag length, input discarded
Prettierrc Ok
4.3/10Prettier JSON/YAML key count, body discarded
Ok
4.3/10protobuf3 message count, body discarded
Ps W
4.3/10PS metric horsepower to watts, number discarded
Psi Kpa
4.3/10PSI to kilopascals, number discarded
Punct Ok
4.3/10punctuation charset, value discarded
Ok
4.3/10IDNA2003 ACE prefix, host discarded
Ok
4.3/10IDNA2008 A-label shape, host discarded
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New servers, score changes, breakages
Every Monday: what shipped, what broke, what's worth trying. Five minutes. No filler.
Four dimensions, weighted
- Reliability (30%) — repository present, permissive license, not archived, official status.
- Documentation (20%) — description length, website presence, README quality.
- Maintenance (25%) — how recently the code was pushed; versioning discipline.
- Adoption (25%) — GitHub stars (log-scaled), remote availability, official endorsement.
What is MCP?
MCP stands for Model Context Protocol. It is an open standard introduced by Anthropic in late 2024 that lets AI assistants like Claude connect to external tools, data sources, and services through a common interface. An MCP server is a small program that exposes one capability (file access, a database, an API) to any MCP-compatible AI client.
Where does the data come from?
Every server in this directory is pulled from the official Model Context Protocol Registry at registry.modelcontextprotocol.io. We also enrich each entry with GitHub metadata (stars, last commit, license, primary language) where a repository is linked. The full re-scan runs daily.
How are servers scored?
Each server gets a 0–10 overall score, weighted from four sub-scores: reliability (30%), documentation (20%), maintenance (25%), and adoption (25%). The full methodology is visible on this page under "How scoring works".
Is this affiliated with Anthropic?
No. MegaOne AI is independent. Anthropic created the MCP standard and maintains the reference implementations, but this directory is built separately and rates all servers including Anthropic's own.
How often does the directory update?
The pipeline re-fetches the full registry and re-scores every active server once per day. Individual entries are refreshed whenever a new version is published to the official registry.
Is it free?
Yes. Browsing, filtering, and searching the directory is free. The weekly email briefing is free. There is no account required.