Best open-source MCP libraries & SDKs

Open-source Model Context Protocol servers and SDKs that connect AI assistants to tools, data and APIs.

Filters · 2 MCP servers, Library / SDK

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Purpose

AI & LLM tooling138Agents & frameworks37Local inference10RAG & vector DBs29Coding assistants4Evals & observability7Agent skills4MCP servers6Developer tools179Web frameworks100Databases & backends15Editors & IDEs3API tools13Self-hosted apps6Notes & docs6Automation19Data & analytics25Infra & DevOps5Security & identity5Communication8Media & photos24Design & creative53

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Web1Docker / self-host5Desktop1Mobile0CLI14Library / SDK6Extension / plugin3

License

Permissive5Copyleft0Source-available0Other / custom1

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Has live demo0Commit in last 90 days6

6 projects

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M

MemPalaceMemPalace/mempalace

Open-source AI memory systemPersonalAI & LLM toolingMCP serversLibrary / SDK★ 59kMITcommit 23 hours ago

87worth

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g

gpt-researcherassafelovic/gpt-researcher

Autonomous deep research agent for web and local documentsPersonalAgent skillsAgents & frameworksMCP serversRAG & vector DBsWeb★ 30kApache-2.0commit last week

85worth

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F

FastMCPPrefectHQ/fastmcp

Fast, Pythonic way to build MCP serversPersonalEnterpriseMCP serversDeveloper toolsLibrary / SDK★ 28kApache-2.0commit 23 hours ago

81worth

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M

MCP Python SDKmodelcontextprotocol/python-sdk

Official Python SDK for MCP servers and clientsPersonalEnterpriseMCP serversLibrary / SDK★ 24kMITcommit yesterday

81worth

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C

ComposioComposioHQ/composio

Toolkits and auth for AI agentsPersonalEnterpriseAgents & frameworksMCP serversLibrary / SDK★ 30kMITcommit yesterday

80worth

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M

MCP TypeScript SDKmodelcontextprotocol/typescript-sdk

Official TypeScript SDK for MCP servers and clientsPersonalEnterpriseMCP serversLibrary / SDK★ 14kcommit yesterday

74worth

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