MCP & Agent Protocols

Model Context Protocol

modelcontextprotocol/modelcontextprotocol

TrendingPopular

Open standard for connecting AI apps to tools, data and prompts; supported by every major model vendor.

MCP TypeScript SDK

modelcontextprotocol/typescript-sdk

Popular

Official TypeScript SDK for building MCP servers and clients over stdio and Streamable HTTP.

MCP Python SDK

modelcontextprotocol/python-sdk

Popular

Official Python SDK for MCP servers and clients, including the built-in FastMCP-style server API.

FastMCP

PrefectHQ/fastmcp

Trending

High-level Pythonic framework for building, composing, proxying and deploying MCP servers and clients.

MCP Reference Servers

modelcontextprotocol/servers

Official reference MCP servers (filesystem, git, fetch, memory and more) used as examples and building blocks.

MCP Registry

modelcontextprotocol/registry

New

Official open catalog and API for discovering publicly available MCP servers.

GitHub MCP Server

github/github-mcp-server

Popular

GitHub's official MCP server giving agents access to repos, issues, pull requests and Actions.

Playwright MCP

microsoft/playwright-mcp

Microsoft's MCP server that lets agents drive a real browser via Playwright accessibility snapshots.

Context7

upstash/context7

Trending

MCP server by Upstash that feeds coding agents up-to-date, version-specific library documentation.

Agent2Agent (A2A) Protocol

a2aproject/A2A

Open protocol, now under the Linux Foundation, for agents built on different frameworks to discover and talk to each other.

AG-UI

ag-ui-protocol/ag-ui

Trending (detected automatically)Rising

Event-based protocol that standardizes how agent backends stream state, tool calls and UI to frontends.

AGENTS.md

agentsmd/agents.md

TrendingNew (detected automatically)

Simple open format for repo-level instructions to coding agents, adopted by tens of thousands of projects.

Agent Skills

agentskills/agentskills

TrendingNew

Open format for packaging instructions, scripts and resources as skills that agents load on demand.

AWS MCP

awslabs/mcp

Open source MCP Servers for AWS