Agent-to-Agent (A2A) Payment Projects

A local-first AI agent with persistent memory, emotional intelligence, and a peer-to-peer skills economy.

Agent behavior that compiles

The A2A x402 Extension brings cryptocurrency payments to the Agent-to-Agent (A2A) protocol, enabling agents to monetize their services through on-chain payments. This extension revives the spirit of HTTP 402 "Payment Required" for the decentralized agent ecosystem.

The trust layer for agent-to-agent commerce — natural-language mandates, ERC-7710 delegated permissions, x402 payments, escrow, and dispute resolution as one open, catch-all Agent Skill / Claude Code plugin.

Aser is a lightweight, self-assembling AI Agent frame.

Golang SDK for A2A Protocol

A small, powerful, open-source CLI coding agent that works with open models.

Beacon - agent-to-agent pings with optional RTC value attached (BoTTube/Moltbook/RustChain + UDP bus)

AI agents platform that gives you a workspace with an integrated team of personal assistants that can work behind the scenes to handle daily monotonous tasks.

Lucid Agents Commerce SDK. Bootstrap AI agents in 60 seconds that can pay, sell, and participate in agentic commerce supply chains. Our protocol agnostic SDK provides CLI-generated templates and drop-in adapters for Hono, Express, Next.js, and TanStack, giving you instant access to crypto/fiat payment rails (AP2, A2A, x402, ERC8004).

An operating system built for AI agents — talk to your NixOS server instead of SSH-ing in. Typed, audited tool access with atomic rollback on every change. Research-grade; run it on a disposable box, not production.

A complete TypeScript implementation of the Python x402 payment protocol extension for A2A (Agent-to-Agent) communication. Enable your AI agents to request, verify, and settle crypto payments seamlessly.

Next.js-like framework building AI Agents that are payment-native. Bootstrap your agent with A2A, MCP, x402 payments, and ERC-8004 identity.

Connect AI agents across any network — zero config, encrypted, skill-based routing

The way AI coordinates and transacts. Routing and settlement layer for your agent economy.

Join.cloud lets AI agents work together in real-time rooms. Agents join a room, exchange messages, commit files to shared storage, and optionally review each other's work — all through standard protocols (MCP and A2A).

npx CLI that scaffolds blockchain-registered AI agents with on-chain identity (ERC-8004), A2A communication, MCP tool serving, and optional USDC micropayments across EVM and Solana.

Bidirectional bridge between Claude Code and OpenAI Codex CLI. Built on Claude Code Channels. Two AI agents, one conversation, real-time web UI.

🤖 AI-Mocks is a Kotlin-based toolkit for mocking and testing LLM APIs with real streaming and SSE support. Simulate OpenAI, Anthropic, Gemini, Ollama, and A2A services locally for reliable integration testing.

Skills & plugins for agentic commerce : UCP, ACP, AP2, A2A, WebMCP, Magento 2, BigCommerce, WooCommerce

AI-powered flood intelligence system featuring h2oGPTe Agent + NVIDIA NIM integration (A2A), NAT pipeline with Nemotron 49B, and real-time flood risk assessment. Part of NVIDIA–H2O.ai AI for Good Blueprint for disaster response and monitoring.

Vaaya MCP server — pay-per-call agent superpowers: media & video generation, product demo videos, web search & scraping, deep/market research, GTM & sales enrichment, code sandboxes, browser automation, email, memory. No API keys.

Autonomous Agentic Coordination Framework (WIP)

A collection of Summoner clients and agents featuring example implementations and reusable templates

Tooling for building applications with x402 payment capabilities. Supports buyer and seller roles.

Drop-in adapters connecting 50+ agent frameworks (LangChain, CrewAI, AutoGen, OpenAI Agents, MCP, A2A, x402) to the Agoragentic marketplace: route a task with execute(), get a receipt, settle in USDC on Base. Monorepo + npm packages for MCP, Micro ECF, and local readiness tooling.

Demo agents showcasing CapiscIO Agent Guard and MCP Guard — trust badges, identity verification, and tool-level authorization for A2A and MCP protocols

Agentic finance infrastructure.

A curated list of Agent-to-Agent (A2A) libraries and SDKs, organized by programming language.

Agent-to-agent communication platform

The first AI agent marketplace. 5,750+ community, 51+ API endpoints, 85% commission. Powered by CashClaw v1.7.0.

540 security tests for AI agent systems — MCP, A2A, x402/L402, decision governance, benchmark integrity, skill supply chain. AIUC-1 pre-cert, NIST AI 800-2 aligned, MCP tool-poisoning reproduction. v4.9.1

Demos and starter code for building agentic finance apps with Crossmint

Cross-vendor agent-to-agent protocol — Claude, Codex, and Gemini communicate via file-based P2P messaging.

The MPP registry — 100+ Machine Payments Protocol tools, SDKs, services, and payment methods across 15+ chains. The definitive directory for Stripe + Tempo agent payments.

Elixir implementation of the Agent-to-Agent (A2A) protocol (https://a2a-protocol.org).

Demo with multiple AI agents using A2A (agent-to-agent) with the Strands Agents SDK.

A Socratic dialogue engine for AI agents.

Virtual MasterCards for AI agents - pay with USDC via x402 on Stellar

kbs_agent_a2a 智能体协议适配中间件

Portable signed records for automated interactions.

AI agent stack that combines A2A messaging + x402 micropayments + ERC‑8004 identity(trustless agent).

AI agent stack that combines A2A messaging + x402 micropayments + ERC‑8004 identity(trustless agent).

AI agent stack that combines A2A messaging + x402 micropayments + ERC‑8004 identity(trustless agent).

🚀 Curated resources for Google's Agent Payments Protocol (AP2), A2A & x402 — blogs, videos, repos & specs. Contributions welcome!

Off-chain credit ledger + hire marketplace for AI agents. Ed25519-signed envelopes, atomic settlement, hire-and-release escrow. https://voidly.ai/pay

Open-source wallet infrastructure for AI agents. Earn, spend, and trade USDC on Solana with human oversight and FROST threshold signing.

Loka AI Agentic Payment P2P Lightning Node ⚡️ is built natively on top of the established Bitcoin Lightning Network infrastructure. By pushing the boundaries of traditional payment channels, we are building a superior, high-throughput P2P Payment Value Network to power autonomous agentic and agent-to-agent economies.

Visual workflow editor for building node-based AI agent workflows with drag-and-drop interface, A2A integration, and real-time execution

Autonomous multi-agent system built using LangChain and LangGraph that orchestrates collaborative agents—Supervisor, Researcher, Writer, and Critiquer—to automatically gather information, generate detailed research reports, refine output, and visualise the workflow as a graph. Includes a Streamlit web UI and optional Graphviz visualisation.

A neutral landscape analysis of AI agent payment protocols (x402, MPP, L402, Google AP2, Visa TAP + ICC, Mastercard Agent Pay, Amex ACE, Google/Shopify UCP, OpenAI ACP, and others). Maintained by Genesis Software Group, Copenhagen. Updated April 2026. CC BY 4.0.

P2P token recycling network for AI Agents. Put unused tokens into a piggy bank, then cashing them out as help when you need it. 💸

Cross-model adversarial code review for Claude Code. Claude-written code gets reviewed by Codex; Codex-written code gets reviewed by Claude. Different models, different blind spots — let them fight. 跨模型对抗式 Code Review Claude Code skill。Claude 写的代码让 Codex 审，Codex 写的让 Claude 审。不同模型有不同盲区，让它们互相找茬。

A curated list of awesome Agentic commerce, Universal Commerce Protocol (UCP), Agentic payments protocol (AP2) resources, tools, and implementations.

DNA — Payment rails for AI agents. x402 micropayment protocol on Solana. Netting, transfer, stream settlement. Receipt anchoring on-chain.

OnIt is an AI agent framework for automation.

🚀 The Rosetta Stone for Agentic Payments - One vending machine, 5+ protocol implementations. Get from zero to working agentic payments in 5 minutes.

🤖 Trustless AI agent economy: Autonomous agents buy/sell data using ERC-8004 identity, x402 gasless micropayments, and CrewAI orchestration on Avalanche Fuji testnet.

Blockchain payment infrastructure for AI Agents

x402 (HTTP 402 Payment Required) SDK + MCP server: let any API charge for itself and any AI agent pay for itself, USDC & stablecoins across EVM, Solana & 8 more chain families, in a couple of lines. Backendless, no fee, self-custodial, paid straight to your wallet. TypeScript, MIT.