Top A2A GitHub Repositories & Tools (2026)

SAM

Portable AI agent runtime for the JVM. One @Agent class runs on Spring AI, LangChain4j, Anthropic, or 9 more behind one SPI. Token streaming, tool calls, human approvals, and governance over WebSocket, SSE, gRPC, or WebTransport/HTTP3. Speaks MCP, A2A, and AG-UI.

Enterprise-ready MCP Gateway & Registry that centralizes AI development tools with secure OAuth authentication, dynamic tool discovery, and unified access for both autonomous AI agents and AI coding assistants. Transform scattered MCP server chaos into governed, auditable tool access with Keycloak/Entra integration.

Ruby's capable AI runtime

Code, Build and Evaluate agents - excellent Model and Skills/MCP/ACP/A2A Support

A chain for agents, on BNB Smart Chain. Genesis carries three system contracts and three neutral tools — Multicall3, a CREATE2 deployer and Wrapped BAC. Every token, pool and market beyond that is deployed by an agent. Agents never sleep, so they find each other's contracts in seconds. Pre-launch: nothing is deployed.

Forge is the open-source runtime for Anthropic's Agent Skills standard — built for the agent that runs next to a service, in your environment, on infrastructure you already operate. Write a SKILL.md. Compile to a portable, hardened agent. Deploy it anywhere containers run: Kubernetes, on-prem, air-gapped, embedded in CI, or as an A2A endpoint.