Official
A visualization language for agents and an MCP server: neat charts from a simple semantic spec
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: 62
A token-lean MCP server for PostgreSQL, MySQL, MariaDB, SQL Server and SQLite with a read-only mode
Official
The official MathWorks MCP server: the agent starts and quits MATLAB, writes and runs code, and checks it for errors and style
Russian stack
Official ClickHouse MCP server: the agent lists databases and tables and runs SQL, read-only by default
Official
Redis's official MCP server: strings, hashes, streams, JSON and vector search from your agent
Official YDB MCP server
YDB MCP
YDB's own official MCP server from the database's developers: parameterized SQL queries, execution plans, directory browsing, and a base for custom servers
2GIS MapGL MCP server
2GIS MCP (mapgl-mcp-server)
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
DataLens official MCP server
datalens-mcp
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
DaData MCP server
DaData MCP
DaData official MCP: an agent looks up companies by tax ID, standardizes addresses and identifies a domain or email owner
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
Official
A lightweight database workspace with an MCP server: the agent reads the schema, runs queries and explores data in PostgreSQL, MySQL and more
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
GraphJin MCP
GraphJin
GraphJin's MCP server gives an agent safe, schema-aware access to SQL and MongoDB instead of raw database credentials
An MCP server for searching and downloading academic papers from arXiv, PubMed, bioRxiv, Semantic Scholar and other open sources
MCP server that gives an agent access to MySQL: schema inspection and queries, read-only by default, writes behind flags
data.gouv.fr MCP
data.gouv.fr MCP Server
Official MCP server for France's open data portal: search, explore and query datasets straight from a chat with the agent
A Python MCP server for MySQL: listing tables, reading data, running SQL and inspecting schema through a controlled interface
Official
Datalayer's MCP server for Jupyter: the agent opens notebooks, edits cells and runs code in a live JupyterLab session
MCP server for Google Sheets and Google Drive: an agent reads, edits and creates spreadsheets, tabs and charts
Neo4j Labs MCP servers: Cypher queries on a graph, graph memory for agents, Aura management and data modeling
Official
MCP server and skills for product analytics: user paths, funnels, segments and transition graphs over event logs
MCP server and CLI to drive real Microsoft Excel: Power Query, DAX, VBA, PivotTables and charts
An MCP server with a toolbox for global briefs: markets, SEC filings, conflict, climate and news from open sources
Official
The official MCP server for the Chroma vector database: collections, documents, semantic and full-text search
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.