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A long-term memory system for AI agents: the agent stores experience and facts, then retrieves them through a built-in MCP server
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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Official
Google's open-source MCP server for databases: ready tools for Postgres, MySQL, BigQuery, Spanner and more, plus custom tools in tools.yaml
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Official Exa MCP server: web search, reading pages as Markdown and multi-step research via Exa Agent
Perplexity MCP Server
Perplexity API Platform MCP Server
Perplexity's official MCP server: web search, quick answers, reasoning and deep research through the Perplexity API
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An MCP server and skills from TigerData that help agents write PostgreSQL schemas and queries from current docs and practices
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The official MathWorks MCP server: the agent starts and quits MATLAB, writes and runs code, and checks it for errors and style
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Official MongoDB MCP server: queries and aggregations, index management, Atlas clusters and local deployments
Jina AI MCP
Jina AI Remote MCP Server
Jina AI's official remote MCP server: pages to Markdown, web search, arXiv, reranking and embeddings
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Vybe's remote MCP server for Solana data: browse the API schema and make live calls to on-chain and market analytics
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A local browser automation platform: MCP server, CLI and skills so an agent can drive Chrome, fill forms and pull data from pages
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A PDF-reading MCP server: structured text, tables, OCR, visual crops and page-level citations
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MCP server and skills for product analytics: user paths, funnels, segments and transition graphs over event logs
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Kagi's official MCP server: web, news, video and image search, plus page extraction to Markdown
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
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Official SerpApi MCP server: the agent gets results from Google, Bing, YouTube, Amazon and other engines as JSON or Markdown
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Hosted MaxStat MCP server for searching and analyzing channels and posts in the MAX messenger
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.