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Ecosystem Projects

Infrastructure, agent frameworks, A2A protocols, multi-agent orchestration, and marketplace platforms building on or extending x402.

★ Featured — August 2026: Glama An MCP registry indexing 64,000+ servers — and the only one publishing both its scoring rubric and its health data. In a space full of unexplained ranks, you can see what it checked and how it decided.

Foundation & Protocol

  • x402 — The canonical x402 protocol repository maintained by the x402 Foundation under the Linux Foundation. Reference implementations, official SDKs, spec documentation. The source of truth for the protocol. 6,147★
  • x402scan — x402 Ecosystem Explorer by Merit Systems. Browse, search, and monitor the x402 service landscape. 346★
  • Awesome Agentic Commerce — Curated resources for the x402 ecosystem by Merit Systems. Comprehensive listing of protocols, SDKs, and projects. 127★

Infrastructure

  • Coinbase Developer Platform — Hosted facilitator service with enterprise-grade reliability and instant settlement. The primary x402 infrastructure layer.
  • Cloudflare x402 — Edge payment processing across 300+ global data centers.
  • Polygon Agentic Payments — Near-instant finality, sub-$0.001 fees, no reorgs. Coinbase CDP facilitator with gas sponsorship and KYT compliance. USDC, USDT, non-USD stablecoins. (Docs)
  • Finance District Prism — Payment gateway for agentic commerce. TypeScript, Python, Java SDKs. Two-layer architecture: Prism (orchestration) and Spectrum (on-chain settlement across Base, Ethereum, Arbitrum, BSC). (Docs)
  • thirdweb Nebula — AI agent transaction framework on x402.
  • MoltsPay — Open payment protocol for AI agents. One JSON file to accept x402 payments. Gasless for both providers and clients. Multi-chain. CLI, TypeScript/Python SDKs, testnet faucet. (Docs)
  • Bermuda — ZK-private HTTP payments for x402. Adds sender privacy via Noir zero-knowledge proofs on Base. Agents pay without exposing wallet balances or transaction history.
  • XyncPay — Protocol translation layer bridging x402, MPP, and AP2. One integration, every AI agent payment protocol. Atomic fee-split settlement via on-chain FeeSplit contract on Base.
  • RustChain — Decentralized PoS blockchain with native x402 for AI agent micropayments. Attestation-based consensus, hardware-bound validators, RTC token economy.
  • EntRoute — Machine-first API discovery for AI agents. 110+ capabilities, semantic intent resolution, continuous 402 verification probes, quality ranking. MCP server, TypeScript SDK, REST API. (Docs)
  • WickedAPI x402 Paywall — Multi-tenant x402 paywall-as-a-service on Base mainnet via the Coinbase CDP facilitator. Self-serve signup, REST API to set price/network/payout wallet and forward to a real backend, live settlement views. Example: GET https://paywall.wickedapi.com/wickedapi/weather returns a live 402. (OpenAPI, Cookbook)

Agent Wallets

  • CardZero — ERC-4337 smart contract wallets for AI agents. Owner-controlled spending rules (per-tx limits, daily caps, whitelist, freeze). x402 buyer support via POST /v1/x402/pay. GitHub
  • Coinbase Agentic Wallets — Wallet infrastructure purpose-built for autonomous AI agents. 50M+ transactions processed since protocol launch.
  • ATXP — Agent identity and funding platform. One command gives an agent a USDC wallet, @atxp.email inbox, phone number, and 100+ paid tools. x402-compatible, $5 free credit, no KYC. (Docs)
  • OpenVPS — AI-agent VPS hosting. Pay USDC on Base, Celo, or Tempo — get root SSH to Ubuntu 24.04 Firecracker microVMs in seconds. x402 + MPP dual-protocol. From $0.005/hr. (GitHub)

Agent Frameworks

  • Franklin — The AI agent with a wallet — spends USDC autonomously to get real work done. Agentic payment-native framework by BlockRun. 636★
  • Lucid Agents — Commerce SDK by Daydreams. Bootstrap AI agents in 60 seconds that can pay, sell, and transact autonomously via x402. 188★
  • Agenti — Give any AI agent a crypto wallet. Agents pay x402 APIs with USDC on Base. Simple drop-in wallet integration. 68★
  • Faremeter — Universal framework for transparent API cost integration into agent workflows. Agents discover, negotiate, and pay for services via x402. 66★
  • mcpay — Open-source infrastructure for MCP and x402. Payment primitives for building monetized MCP servers. 90★
  • use-agently — Routing and settlement layer for AI agents. x402-native payment coordination for multi-agent workflows. 69★
  • Vault-0 — Encrypted secret vault, agent monitor, and x402 wallet for OpenClaw. Handles 402 detection, EIP-3009 signing, policy-gated auto-settlement.
  • Nevermined — Integrated Visa Intelligent Commerce + x402 for autonomous AI agent commerce (April 9, 2026). Agents get delegated credit card spending authority with budget limits, per-purchase caps, merchant restrictions, time windows.
  • Phidata Agents — Multi-modal agents with x402 integration.
  • NEAR AI — Cross-chain agent settlements.
  • World AgentKit — Integrates World's WorldID biometric identity with x402. AI agents prove they act on behalf of a verified unique human during x402 transactions. 18M+ verified humans.

Agent-to-Agent (A2A)

  • AP2 — Agent Payments Protocol — Apache-2.0 authorization layer sitting above payment rails, built on signed user mandates. Notable for what it concedes: its Trusted Surface must be non-agentic UI, which puts a human screen at the trust anchor of an agent-payments protocol.
  • Agent Commerce Kit (ACK) — MIT-licensed DID and verifiable-credential toolkit for agent identity. Builds owner-accountable delegation chains — the opposite design pole from ERC-8004's pseudonymous on-chain identity.
  • Skyfire — Agent identity and payment credentials as ES256 JWTs with a public JWKS endpoint. The rare pattern in this space that a stranger can verify without contacting the issuer — worth studying if you're designing receipts.
  • Google A2A x402 Extension — Agent commerce protocol. Python and TypeScript implementations. Payment-required, payment-submitted, payment-completed flow. Multi-agent payment orchestration.
  • Revettr — Counterparty risk scoring API for x402 agentic commerce. Scores wallet addresses, domains, IPs, and companies 0-100 for agent-to-agent payment safety.
  • Animica Agent Job Network — Agents post tasks with a USDC budget and other agents perform them for payment; escrow holds the budget until the buyer's chosen verification passes, rejected jobs refund in full, receipts are ML-DSA-65 signed. Example: POST /api/v1/jobs/quote {"capability":"summarise","budget_usd":1}. (OpenAPI)

Multi-Agent Orchestration

  • SwarmX — Multi-agent AI orchestration with native x402 micropayments on Solana. 49 endpoints, 39 MCP tools, dual LLM, knowledge/RAG with pgvector. ElizaOS v2 plugin. (npm)
  • payagent — Drop-in fetch wrapper that auto-handles HTTP 402 responses. Zero agent code changes required.
  • AlphaClaw — Autonomous AI agent network hunting alpha on Polymarket and DeFi. 6 specialized microservices sell data streams via x402, one coordinator buys from all and synthesizes. ACP with stake-weighted voting.

Marketplaces & Discovery

  • Official MCP Registry — The canonical registry for the Model Context Protocol. The upstream source that Glama, PulseMCP and other aggregators pull from. Namespace authentication via GitHub — the closest thing the MCP world has to a name you can trust.
  • Glama — MCP registry indexing 64,239 servers, and the only one that publishes both its scoring rubric and its health data. Rare in this space: you can see what it checked and how it decided.
  • Agent.market — x402 Foundation's official app store for agents. Launched April 20, 2026. Unified marketplace aggregating x402-enabled services. Find, evaluate pricing, consume services. Backed by Coinbase.
  • WorkProtocol — Open job marketplace where AI agents find structured work, deliver artifacts, and get paid in USDC on Base. Escrow-backed, portable on-chain reputation, framework-agnostic.
  • MAXIA — AI-to-AI marketplace implementing x402 V2 micropayments on Solana and Base for autonomous agent service payments.
  • AgentStore — Open-source marketplace for Claude Code plugins with x402 USDC payments, 80/20 publisher revenue split, permissionless publishing via CLI.
  • x402 Bazaar — Decentralized API marketplace with 69 native x402-payable endpoints. Multi-chain USDC on Base and SKALE. MCP server via npx x402-bazaar init. 505 passing tests.
  • Satring — Curated L402 + x402 API directory with human ratings, health monitoring, MCP server. Dual-protocol (Lightning + USDC on Base).
  • minia2a.uk — Open M2M micropayment marketplace. 173 x402-payable services across 50+ categories (crypto data, web scraping, email verification, token security, agent toolkits). 34 registered agents. 5% fee, USDC settlement on Base. MCP registry, CLI, and 5-minute hands-on tutorial.
  • Frantic — Bounty board where AI agents claim funded work, deliver artifacts in the open, and are paid in USDC on Base only when a delivery is accepted, with x402 pay-per-post at POST /v1/vendor-postings/x402, a manifest at /.well-known/x402, and every claim, judgment, and payout sealed to a public receipt ledger.

Notable Implementations

  • x402-audio-to-audio — Transmits signed USDC payments over sound using a custom OOK audio modem with Goertzel DSP. A creative demonstration of x402's protocol flexibility. 35★

Charity & Social Impact

  • x402charity — Open-source micro-donation server powered by x402. Drop-in Express/Next.js middleware triggers USDC charity donations on every user action. npm package, CLI, Vercel-deployable server with dashboard. (npm)