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.
Pubchem
4.5/10PubChem MCP — NIH chemistry compound database (no auth)
Trefle
4.5/10Trefle MCP — global plant database (1M+ species)
Ai Incident Db
4.5/10AI Incident Database (AIID) MCP
Inspire Hep
4.5/10INSPIRE-HEP high-energy physics literature database
Reactome
4.5/10Reactome biological pathway database
Gnomad
4.5/10Broad Institute gnomAD genomic variant database (GraphQL)
Osv Dev
4.5/10OSV.dev — Google's open-source vulnerability database
Openfoodfacts
4.5/10Open Food Facts — collaborative food product database
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
Boe Uk
4.5/10Bank of England Interactive Statistical Database (IADB) MCP.
Geoboundaries
4.5/10geoBoundaries MCP — open database of political administrative boundaries.
Rawg
4.5/10RAWG MCP — wraps the RAWG video games database API (rawg.io)
Scryfall
4.5/10Scryfall MCP — Magic: The Gathering card database.
Openchargemap
4.5/10Open Charge Map MCP — global EV charging station database (openchargemap.io).
Recreation Gov
4.5/10Recreation.gov MCP — wraps the Recreation Information Database (RIDB) API v1
Ygoprodeck
4.5/10YGOPRODeck MCP — Yu-Gi-Oh! trading card game (TCG) database.
Disney
4.5/10Disney character database MCP.
Paleobiodb
4.5/10Paleobiology Database (PBDB) MCP — the global fossil record. Keyless.
Peeringdb
4.5/10PeeringDB MCP — the peering ecosystem database.
Theaudiodb
4.5/10TheAudioDB MCP — community music metadata database.
Crystallography
4.5/10Crystallography Open Database (COD) MCP.
Intact
4.5/10IntAct (EBI) molecular-interaction database MCP. Keyless.
Rhea
4.5/10Rhea MCP — expert-curated database of biochemical reactions.
Sgd
4.5/10SGD (Saccharomyces Genome Database) MCP.
Wikipathways
4.5/10WikiPathways MCP — open community pathway database.
Oqmd
4.5/10OQMD (Open Quantum Materials Database) MCP.
Chembl
4.5/10ChEMBL MCP — drug discovery database (EBI).
Geonames
4.5/10GeoNames MCP — GeoNames geographical database API
Legislation Uk
4.5/10legislation.gov.uk MCP — the UK's official legislation database.
Uniprot
4.5/10UniProt MCP — protein sequence + function database.
MCP Server
4.5/10Build and deploy full-stack Next.js apps with 98 tools for React, AWS, and MongoDB.
MCP Server
4.5/10Built-in MCP server for ArcadeDB multi-model database (graph, document, vector, time-series)
Queryweaver
4.5/10An MCP server for Text2SQL: transforms natural language into SQL using graph schema understanding.
Chinese Law MCP
4.5/10Chinese law database — cybersecurity, data protection, commercial law with full-text search
Arcadedb
4.5/10Multi-Model database with built-in MCP server for SQL, Cypher, Gremlin, and GraphQL.
Total Recall
4.5/10Persistent, verified, cross-session memory for AI agents. 26 tools. SQLite + sync.
Total Recall
4.5/10Persistent, verified, cross-session memory for AI agents. 26 tools. SQLite + sync.
Zotero Bridge
4.5/10MCP Server for Zotero SQLite Database - collection, tagging, PDF reading and more.
Agentbuilders
4.5/10Deploy full-stack AI agent apps with database, auth, storage, and Edge AI on one platform.
Greptimedb MCP Server
4.5/10Query and analyze GreptimeDB metrics, logs and traces via SQL, TQL and RANGE queries.
Agent Team
4.5/1013 specialized AI agents collaborating via SQLite. 44 MCP tools. One-command install.
Shrike MCP
4.5/10AI agent security scanner — prompt injection detection, SQL injection, PII isolation, threat intel.
A2Db
4.5/10Safe, read-only database access for AI agents. 5 databases, batch queries, SQLGlot.
Spark Sql MCP Server
4.5/10Query Spark SQL clusters via Thrift/HiveServer2. Works with Spark, EMR, Hive, Impala.
Dbhub Analytics
4.5/10MCP server for Databricks, BigQuery, PostgreSQL, MySQL, SQL Server, SQLite, MariaDB
Interactive Terminal
4.5/10MCP server for real interactive terminal sessions — REPLs, SSH, databases, Docker
Mosta Net
4.5/101 MCP server, 13 databases, zero config. Multi-protocol transport with Auth + RBAC.
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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.