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: 42
Official
An MCP server and skills from TigerData that help agents write PostgreSQL schemas and queries from current docs and practices
Russian stack
Official ClickHouse MCP server: the agent lists databases and tables and runs SQL, read-only by default
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 global intelligence MCP server: news, geopolitical risk, markets and infrastructure exposed as agent tools
Connects a Zotero library to Claude and other agents: search papers, annotate, cite, and search by meaning
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
An MCP server for searching and downloading academic papers from arXiv, PubMed, bioRxiv, Semantic Scholar and other open sources
Needs a VPN
MCP server and CLI that turns paper text or data into academic figures, diagrams and plots
MCP server that gives an agent access to MySQL: schema inspection and queries, read-only by default, writes behind flags
An MCP server for Brazil's open data: economy, laws, public procurement, courts, elections, environment and more
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
Official
On-premises RAG in containers with an MCP server: the agent searches your documents while data stays local
Official
MCP server and skills for product analytics: user paths, funnels, segments and transition graphs over event logs
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
MCP server for Apple Health data: an agent answers questions about sleep, workouts and heart rate with SQL
DuckDB / MotherDuck MCP Server
DuckDB / MotherDuck Local MCP Server
An MCP server for SQL analytics on DuckDB: local files, in-memory databases, S3-hosted databases and MotherDuck
Official
Baidu Maps' official MCP server: geocoding, place search, routes, weather and traffic, focused on China
Official
Mapbox's official MCP server: geocoding, place search, routing, isochrones, in-chat maps and offline geo calculations
Official
Apache Doris's official read-only MCP server: catalogs, queries, cluster diagnostics, search and lineage
An MCP server that lets an agent run local Stata: regressions, econometrics, replicating computations from papers
Official
Official Zilliz MCP server: the agent runs vector and text search and manages collections and data in Milvus
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.