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.
Blockchair
4.5/10Blockchair multi-chain block explorer (BTC, ETH, LTC, DOGE, XMR, +12 more)
Datagouv Fr
4.5/10France data.gouv.fr open-data catalogue
Datagov Au
4.5/10Australia data.gov.au open-data catalogue (CKAN)
Ebi Ols
4.5/10EBI Ontology Lookup Service — 250+ biomedical ontologies
Ietf Datatracker
4.5/10IETF Datatracker RFCs / drafts / working groups / people
Kitsu
4.5/10Kitsu anime + manga catalogue (JSON:API)
Opentargets
4.5/10Open Targets MCP — disease/target/drug knowledge graph.
Repology
4.5/10Repology cross-distro package version aggregator
Squiggle
4.5/10AFL (Australian Football League) fixture, ladder, and crowd-sourced tips
Tatoeba
4.5/10Tatoeba multilingual sentence corpus (~13M sentences, 400+ languages)
Anapioficeandfire
4.5/10An API of Ice and Fire — A Song of Ice and Fire (books/characters/houses)
Data Europa
4.5/10data.europa.eu — official EU open-data hub (~1.6M datasets)
Deps Dev
4.5/10deps.dev — Google's package metadata + dependency graph API
Ensembl
4.5/10Ensembl REST — vertebrate genomes, sequences, comparative genomics, variation
Fmi
4.5/10Finnish Meteorological Institute open data (forecast, observations, warnings)
Gdacs
4.5/10GDACS — Global Disaster Alert & Coordination System (EQ/TC/FL/VO/DR/WF)
Monarch Initiative
4.5/10Monarch biomedical knowledge graph — diseases, phenotypes, genes, variants
Mygene Info
4.5/10MyGene.info — gene annotation joining NCBI/Ensembl/UniProt/KEGG/OMIM
Noaa Swpc
4.5/10NOAA Space Weather Prediction Center (solar wind, Kp, aurora, alerts)
Noaa Tides
4.5/10NOAA Tides & Currents — observations, predictions, datums, station metadata
Opencitations
4.5/10OpenCitations COCI — open-license citation index by DOI
String Db
4.5/10STRING protein-protein interaction networks across ~12k organisms
Studio Ghibli
4.5/10Studio Ghibli fan API (films, people, locations, species, vehicles)
Agent Revenue Copilot
4.5/10MCP/x402 starter audit; payment-ready buyers call buy_now first.
MCP Cpg Gtin
4.5/10MCP CPG GTINs — B2B Retail Grocery Procurement
Neus MCP
4.5/10The trust harness for AI agents. Set what an agent can do before it acts.
Greengooding MCP
4.5/10Read-only catalog for Green Gooding — NYC peer-to-peer rental marketplace.
Smsenmasse
4.5/10Envoyez des SMS et gérez vos campagnes directement depuis vos agents IA.
Frankfurter
4.5/10Convert currencies and fetch blended FX rates from 50+ institutional sources.
Bioregistry
4.5/10Bioregistry — meta-registry of biomedical identifier prefixes
Cdec Ca
4.5/10California Data Exchange Center (CDEC) hydrology, reservoirs, snow water
Cisa Kev
4.5/10CISA Known Exploited Vulnerabilities catalog
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
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
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
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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.