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.
Commons Wikimedia
4.5/10Wikimedia Commons file/image/audio/video search via MediaWiki Action API
Data Cityofchicago
4.5/10City of Chicago Socrata open-data portal
Data Ny
4.5/10data.ny.gov — New York State open-data Socrata portal
Dataverse Harvard
4.5/10Harvard Dataverse — research dataset repository (~150k datasets)
Dwds
4.5/10DWDS German Digital Dictionary (snippet/lemma/concordance/kwic)
Eu Parliament
4.5/10European Parliament Open Data — MEPs, plenary docs, sessions
Exoplanet Archive
4.5/10NASA Exoplanet Archive — ~5600 confirmed exoplanets + candidates
Gov Uk Content
4.5/10GOV.UK Content + Search APIs (every gov.uk page + full search)
Gtex
4.5/10GTEx — Genotype-Tissue Expression human gene-expression atlas
Homebrew Formulae
4.5/10Homebrew formulae + casks + install analytics (formulae.brew.sh)
Horizons Nasa
4.5/10NASA JPL Horizons — solar-system body ephemerides
Iso Codes
4.5/10ISO country/language/currency/script code lookups (Debian iso-codes JSON)
Lemmy
4.5/10Lemmy MCP — public reads on any Lemmy instance.
Librivox
4.5/10LibriVox public-domain audiobooks (~17000 titles in dozens of languages)
Mast Nasa
4.5/10MAST (Mikulski Archive for Space Telescopes) — Hubble/JWST/Kepler/TESS
Mitre Attck
4.5/10MITRE ATT&CK adversary TTPs (STIX bundles)
Mitre Cwe
4.5/10MITRE Common Weakness Enumeration (CWE) API
Noaa Spc
4.5/10NOAA Storm Prediction Center — outlooks, storm reports, watches
Ons Uk
4.5/10UK Office for National Statistics dataset catalogue + Beta JSON API
Opendata Canada
4.5/10open.canada.ca — Canada national open-data catalogue (CKAN)
Openfigi
4.5/10OpenFIGI — Bloomberg open financial-instrument symbology service
Openfoodfacts
4.5/10Open Food Facts — collaborative food product database
Opentopodata
4.5/10Open Topo Data — global elevation lookups (multiple DEM datasets)
Public Suffix List
4.5/10Mozilla Public Suffix List — eTLD parser (cached 24h)
Pypi Stats
4.5/10PyPIStats.org — PyPI download statistics
Scb Se
4.5/10Statistics Sweden (SCB) — PxWeb JSON-stat statistical database
Simbad
4.5/10CDS SIMBAD — astronomical object database (~14M objects) via TAP/script
Tldr Pages
4.5/10tldr-pages community simplified man pages (cached 24h)
Vizier
4.5/10CDS VizieR — astronomical catalogue server (tens of thousands of catalogues)
Google Scholar
4.5/10Search Google Scholar for academic papers, citations, and author profiles.
Balldontlie
4.5/10balldontlie.io NBA stats (free API key required)
Brawl Stars
4.5/10Brawl Stars player, club, brawlers, events, rankings. Supercell dev key.
Bungie
4.5/10Bungie.net Destiny 2 + clan API: manifest, profile, characters, stats.
Cheapshark
4.5/10PC game deals across Steam/Epic/GOG/Humble via CheapShark. Keyless.
Clash Royale
4.5/10Clash Royale player, clan, war, tournament, rankings, cards. Supercell dev key.
Clinicaltables
4.5/10NIH Clinical Tables: ICD-10/9, RxTerms, LOINC, NPI, conditions search. Keyless.
Codewars
4.5/10Codewars user profiles, completed kata, authored kata, kata detail. Keyless.
Comicvine
4.5/10Comic Vine: characters, issues, volumes, creators, publishers. Free key.
Cryptocompare
4.5/10CryptoCompare prices, OHLC history, social stats, news, exchanges.
Datos Gob Es
4.5/10datos.gob.es — Spanish open-data catalogue
Deno Land
4.5/10deno.land/x third-party Deno module registry
Dummyjson
4.5/10DummyJSON mock REST: products, users, posts, recipes, todos. Keyless test data.
Figshare
4.5/10Figshare research outputs (datasets, papers, posters)
Giantbomb
4.5/10Giant Bomb video-game catalog (free key)
Goproxy
4.5/10Go module proxy — module info, versions, go.mod
Hpo Api
4.5/10Human Phenotype Ontology — clinical phenotype terms + gene/disease annotations
Ipify
4.5/10ipify: caller IPv4/IPv6 echo. Useful for verifying gateway egress.
Free · No spam
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.