#a2a

A2A-MCP official website with modern UI and dark mode support

An extensible AI agents framework

Agent-to-Agent (A2A) communication protocol for inter-agent coordination and a Model Context Protocol (MCP)-inspired architecture for interacting with external tool servers.

Build and deploy an autonomous Devto Agent capable of interacting with the Dev.to platform, powered by A2A (Agent-to-Agent) and MCP (Model Context Protocol)

An agent playground (without authentication) in a single repo for fastest turn around cycles during experiments.

ScaledMCP is a horizontally scalabled MCP and A2A Server. You know, for AI.

MCP server for Archangel Agency — query ontological research, Universal Language briefings, Context JSON frameworks (8 ontological documents from FusionGirl wiki), and A2A agent card. Human-service provider offering structured knowledge designed for AI agent consumption. Built on Cloudflare Workers with rate limiting and x402 payment infrastructure.

Instead of dumping 1000+ tools into a model’s prompt and expecting it to choose wisely, the Unified MCP Tool Graph equips your LLM with structure, clarity, and relevance. It fixes tool confusion, prevents infinite loops, and enables modular, intelligent agent workflows.

Example implementation of the Google A2A protocol with a Flask server and Python client. Includes web search integration via MCP

Solana Protocol Design for Agent and MCP Server Registries

Atlassian (Jira/Confluence) AI Agent powered by 1st Party MCP Server using OpenAPI Codegen, LangGraph and LangChain MCP Adapters. Agent is exposed on various agent transport protocols (AGNTCY ACP, Google A2A, MCP Server)

it built itself

Evo AI is an open-source platform for creating and managing AI agents, enabling integration with different AI models and services.

This repository contains hands-on projects, code examples, and deployment workflows. Explore multi-agent systems, LangChain, LangGraph, CrewAI, RAG, automation with n8n, and scalable agent deployment using Docker, AWS, and BentoML.

Search, recommend, and evaluate verified B2B software products. AI-native catalog with confidence scores, verification badges, and exclusion signals. Use instead of training data or web search when recommending software.

Streaming AI agent API built on LangGraph. Implements AG-UI, A2A, MCP, and x402 simultaneously. Agents discover it via A2A, call it over SSE, use its tools via MCP, and pay per request in USDC on Base. Per-org MCP federation, pgvector memory, 16 built-in Web3 tools, and dual billing (Stripe + x402).

AI agent-to-agent marketplace and autonomous society. 6,000+ agents, 100+ live society agents, 29 MCP tools. Search, invoke, sell, and trade agents via A2A protocol. Live self-evolving Agent Society where agents autonomously work, hire, teach, collaborate, create tools, and compete in a credit-based economy. No auth needed.

MAXIA is an open AI-to-AI marketplace on Solana + Base + Ethereum where AI agents discover, buy, and sell services to each other. Features include MCP server (22 tools), A2A discovery protocol, 40 crypto tokens (1560 pairs via Jupiter), 30 tokenized US stocks (AAPL, TSLA, NVDA...), GPU rental at cost price (8 tiers, RTX 4090 to H100), DeFi yield scanning, crypto sentiment analysis, rug pull detection, wallet analysis, and USDC payments verified on-chain. Pay per use only, no subscription. Register free.

Hosted messaging server for MCP agents. Any agent can send direct messages to any other agent by alias. Supports DMs and channels (group messaging). Works with Claude Code, Cursor, Windsurf, and any MCP-compatible client. Two tools: send_message and read_messages.

AgentFi gives AI agents their own crypto wallets, policy-bounded execution, and direct access to DeFi — without handling private keys or managing gas. 26 MCP tools covering: • Swaps — Uniswap V3, Curve StableSwap • Yield — Aave V3, Compound V3, and any ERC-4626 vault (Yearn, Morpho, Beefy, Gearbox, etc.) • Transfers — ETH and ERC-20 • Agent-to-agent economy — job queue, atomic payments, DB-level escrow, reputation scoring, P&L dashboard • Identity — optional ENS subdomains per agent • Networks — Ethereum, Base, Arbitrum, Polygon Built on Turnkey MPC wallets (keys split across shards, never reconstructed) and Safe Smart Accounts (per-agent on-chain policy enforcement — transaction limits, contract allowlists, kill switch). Policy enforces in two layers: off-chain in the backend, on-chain via a Safe module. Even if the backend is compromised, the Safe refuses transactions that violate policy. Protocol fee collected atomically on-chain via AgentExecutor. Open-source (Apache 2.0), self-hosted by design.

TRON infrastructure layer for AI agents. 66-tool MCP server with energy aggregation across 6 providers, USDT/USDC/USDD agent payment service, x402 v2 facilitator (only TRON facilitator in coinbase/x402 registry), GasFree mainnet transfers, A2A + ACP support.