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: 42

Official

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

4.3KRepository stars
Official

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

1.9KRepository stars
Russian stack

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

880Repository 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

3Repository stars
Official

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

Official

A global intelligence MCP server: news, geopolitical risk, markets and infrastructure exposed as agent tools

87.5KRepository stars

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

5.2KRepository 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

4.4KRepository stars

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

2.7KRepository stars
Needs a VPN

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

2.4KRepository stars

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

2.1KRepository stars

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

1.8KRepository 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

1.6KRepository stars
Official

On-premises RAG in containers with an MCP server: the agent searches your documents while data stays local

1KRepository stars
Official

MCP server and skills for product analytics: user paths, funnels, segments and transition graphs over event logs

919Repository stars

An MCP server with a toolbox for global briefs: markets, SEC filings, conflict, climate and news from open sources

653Repository stars
Official

The official MCP server for the Chroma vector database: collections, documents, semantic and full-text search

599Repository stars

MCP server for Apple Health data: an agent answers questions about sleep, workouts and heart rate with SQL

570Repository stars

DuckDB / MotherDuck MCP Server

DuckDB / MotherDuck Local MCP Server

Official

An MCP server for SQL analytics on DuckDB: local files, in-memory databases, S3-hosted databases and MotherDuck

525Repository stars
Official

Baidu Maps' official MCP server: geocoding, place search, routes, weather and traffic, focused on China

445Repository stars
Official

Mapbox's official MCP server: geocoding, place search, routing, isochrones, in-chat maps and offline geo calculations

356Repository stars
Official

Apache Doris's official read-only MCP server: catalogs, queries, cluster diagnostics, search and lineage

348Repository stars

An MCP server that lets an agent run local Stata: regressions, econometrics, replicating computations from papers

261Repository stars
Official

Official Zilliz MCP server: the agent runs vector and text search and manages collections and data in Milvus

245Repository 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.