MCP servers

An MCP server connects an agent to external data and tools over a single protocol: files, databases, APIs and services. This section lists servers with their transport, auth method and environment variables, an install command and an honest read on the risks.

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Found: 69

Official

Google's open-source MCP server for databases: ready tools for Postgres, MySQL, BigQuery, Spanner and more, plus custom tools in tools.yaml

High risk16.5KRepository stars
Official

A visualization language for agents and an MCP server: neat charts from a simple semantic spec

Medium risk4.3KRepository stars

A token-lean MCP server for PostgreSQL, MySQL, MariaDB, SQL Server and SQLite with a read-only mode

High risk3.6KRepository stars
Official

An MCP server and skills from TigerData that help agents write PostgreSQL schemas and queries from current docs and practices

Medium risk1.9KRepository stars
Official

The official MathWorks MCP server: the agent starts and quits MATLAB, writes and runs code, and checks it for errors and style

High risk1.6KRepository stars
Official

Official MongoDB MCP server: queries and aggregations, index management, Atlas clusters and local deployments

High risk1.1KRepository stars
Russian stack

Official ClickHouse MCP server: the agent lists databases and tables and runs SQL, read-only by default

Medium risk880Repository stars
Official

Neon's official remote MCP server: projects, branches, SQL queries and Postgres migrations from your agent

High risk648Repository stars
Official

Redis's official MCP server: strings, hashes, streams, JSON and vector search from your agent

High risk628Repository stars
Official

YDB's own official MCP server from the database's developers: parameterized SQL queries, execution plans, directory browsing, and a base for custom servers

High risk29Repository stars

2GIS MapGL MCP server

2GIS MCP (mapgl-mcp-server)

Official

2GIS's official MCP server on top of the MapGL JS API: place search, geocoding, routes and isochrones, works with a demo key out of the box

Low risk3Repository stars
Official

The official DataLens MCP server from the development team: turns the public DataLens API into three gateway tools instead of hundreds of separate MCP tools

Medium risk3Repository stars
Official

DaData official MCP: an agent looks up companies by tax ID, standardizes addresses and identifies a domain or email owner

Medium risk

Connects a Zotero library to Claude and other agents: search papers, annotate, cite, and search by meaning

Medium risk5.2KRepository stars
Official

A desktop SQL workspace with a built-in MCP server: the agent reads the schema and runs queries in the same client you already use

High risk5.1KRepository stars
Official

A lightweight database workspace with an MCP server: the agent reads the schema, runs queries and explores data in PostgreSQL, MySQL and more

High risk5KRepository stars
Official

An MCP server from AntV for generating charts and diagrams: 25+ visualization types, from lines and bars to maps, mind maps and network graphs

Medium risk4.4KRepository stars

GraphJin MCP

GraphJin

Official

GraphJin's MCP server gives an agent safe, schema-aware access to SQL and MongoDB instead of raw database credentials

High risk3.2KRepository stars

An MCP server for searching and downloading academic papers from arXiv, PubMed, bioRxiv, Semantic Scholar and other open sources

Medium risk2.7KRepository stars
Needs a VPN

MCP server and CLI that turns paper text or data into academic figures, diagrams and plots

Medium risk2.4KRepository stars

MCP server that gives an agent access to MySQL: schema inspection and queries, read-only by default, writes behind flags

Medium risk2.1KRepository stars

An MCP server for Brazil's open data: economy, laws, public procurement, courts, elections, environment and more

Medium risk1.8KRepository stars

data.gouv.fr MCP

data.gouv.fr MCP Server

Official

Official MCP server for France's open data portal: search, explore and query datasets straight from a chat with the agent

Medium risk1.6KRepository stars

A Python MCP server for MySQL: listing tables, reading data, running SQL and inspecting schema through a controlled interface

High risk1.4KRepository stars

Frequently asked questions

What is an MCP server?

An MCP server connects an agent to external data and tools over a single protocol: files, databases, APIs and services. The agent calls its tools while it works.

How do I connect an MCP server to an agent?

The entry lists how to run it (npx, uvx, docker or a remote URL) and the environment variables. A config snippet goes into the agent settings.

Do I need a key or a paid account?

It depends on the server. Each entry states the auth method and requirements, including paid accounts, in the limitations block.