Accept agent payments in USDC across Ethereum and EVM chains.
x402 is chain-agnostic, but the EVM ecosystem — Ethereum mainnet and its L2s — hosts a large share of the tooling. USDC is available natively across these chains, so the same x402 flow works whether you settle on Ethereum, Base, or another EVM network. Libraries built on viem and wagmi make the server and client sides drop-in.
Here are the Ethereum / EVM projects tracked in the directory.
Real projects from the directory · stars live from GitHub · sorted by popularity. Showing the top 60 of 105.
Open Source AI trading agent that operates autonomously across 1000+ markets - Polymarket, Kalshi, Binance, Hyperliquid, Solana DEXs, 5 EVM chains. Scans for edge, executes instantly, manages risk while you sleep. Agent commerce protocol for machine-to-machine payments. Self-hosted. Built on Claude.
Drop-in OpenAI Python client with transparent x402 payment support.
Drop-in OpenAI Typescript client with transparent x402 payment support.
The neutral micropayment router for autonomous agents. A single HTTP client that intercepts '402 Payment Required', routes across x402, L402, and MPP, persists credentials as recoverable assets, enforces per-envelope budgets, and emits a structured trace.
A wallet for agents. Make payments via x402, use stablecoins, swap assets, earn yield with defi and buy tokenized stocks across the most popular chains.
A chain-agnostic AI-native payment infrastructure, authz layer for x402
Vault-0: Agent Security, Monitor & x402 Wallet for OpenClaw. Encrypted secret vault, real-time agent monitor, policy enforcement, and native x402 payments — built with Rust + Tauri.
Developer integration tools for adding TDM payments to AI agents, apps, and workflows. CLI, MCP server, and copy-paste examples
Open contract-facing SDK for payable routes and gateway-backed integrations. Thin public surface for authorize, checkout, and session flows.
Developer integration tools for adding TDM payments to AI agents, apps, and workflows. CLI, MCP server, and copy-paste examples
Private x402 payments on zERC20 — hide who paid whom, not the price tag.
154 Web3 MCP tools for Claude Code, custody-free. Plus an agent wallet prompt injection can't drain: per-tx, daily, and on-chain (ERC-4337) spending caps the model can't bypass. EVM + Solana + Tron DEX/DeFi, perps, prediction markets, contract deploy + audit.
AI agent stack that combines A2A messaging + x402 micropayments + ERC‑8004 identity(trustless agent).
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.
Korean resources and tutorials for x402 payment protocol on Base chain
Create and register ERC-8004 trustless AI agents on any EVM chain — Ethereum, BNB Chain, Base, Arbitrum, Optimism, Polygon, and more. Zero-dependency standalone UI for on-chain agent identity registration, reputation, and validation. Mint ERC-721 NFT agent identities with metadata, service endpoints, A2A/MCP discovery, and x402 payment support.
Safe bridge between AI agents and Web3 transactions. Open-source React kit + protocol with anti-phishing UI patterns built in.
One-command local development environment for HTTP 402 Payment Required protocol with blockchain payments (EIP-3009 USDC)
Self-hosted x402 payment facilitator server — verifies and settles any ERC-20 token via EIP-7702
Gas-sponsored USDC transfers on Ethereum mainnet via ERC-20 permit signatures
Security-first MCP skill for agent-to-agent hiring with escrowed USDC payments, x402 micropayments, and policy-gated on-chain execution
Open-source marketplace for Claude Code plugins. Publish in 2 HTTP requests, earn 80% in USDC. Install: /plugin marketplace add techgangboss/agentstore
Original Helixa / AgentDNA / Cred implementation and reference materials. New Multipass development: github.com/Bendr-20/multipass.
Whether you're running an online store or a retail location, we have the tools you need to start accepting crypto payments.
Permit402 smart contract for the x402 payment protocol — gasless ERC20 payment authorization on EVM and TRON
Enterprise audit, compliance & budget enforcement layer for the x402 payment protocol
Permissionless wallet infrastructure for AI agents. Create wallets, sign transactions, and broadcast on EVM + Solana. Pay and accept x402 payments. Built-in guards. No KYC. Up to 50% less expensive than Coinbase.
Give your agent a spending limit it can't exceed. Non-custodial tabs on Solana, plus one-shot x402 across the major EVM chains. Buyer + seller SDKs.
MCP server for Azeth — smart accounts, payments, reputation, and discovery tools for AI agents
💻 Spin up a complete local x402 payment server to test the HTTP 402 Payment Required protocol with blockchain payments effortlessly.
A set of Ethereum-compatible smart contracts that standardize status codes, policy checks, and intent validation for Web3 transactions, designed to integrate cleanly with an HTTP/x402 gateway and agent layer.
NodusAI is an Oracle API that produces grounded, probabilistic market signals
Open Source x402 API Router. Instantly turn any API into a USDC pay-per-request Service for AI Agents.
x402 service provider tooling for Azeth — gate Hono endpoints behind x402 payments
Automatic micro-donations powered by x402. Drop-in Express/Next.js middleware that sends USDC to charities on every user action. npm install x402charity.
TypeScript SDK for Azeth — smart accounts, x402 payments, reputation, and service discovery
Autonomous yield for AI agents on Base. 80% liquid, 20% earning. No lockup. One SDK call.
Run Claude Code and OpenAI Codex directly from a USB drive without installation, leaving no trace on the host machine.
Daipay is a Maker DAI based Open-source stable cryptocurrency payment processor with shopping cart and mobile payments http://www.daipay.io/
Instant payment rails for AI agents — BTC/ETH/SOL settlement, 116+ forks
Drop-in fetch wrapper that auto-pays HTTP 402 endpoints on Abstract.
Portable desktop/USB app for multi-agent x402 and key management. Get a grip on your agents!
⚡ x402 — Internet-Native Payments Protocol with AI Agent 🤖 A next-generation payment protocol enabling seamless, programmable internet transactions powered by AI agents. Designed for automation, micro-payments, and intelligent on-chain interactions across decentralized ecosystems.
An autonomous marketplace where OpenClaw AI agents discover, hire, and pay each other for specialized tasks via x402 USDC micropayments.
One line of code to accept digital dollars. HTTP-native x402 payment protocol for blockchain payments with Express middleware and Axios client support.
Watch two AI agents discover, negotiate, and pay each other — a complete machine economy demo
x402 library for creating server resources and clients using the Internet Computer (ICP) blockchain.
Multi-chain ERC20 payment layer using EIP-3009 signed authorizations — client and server building blocks with CAIP-2 network routing.
We currently track 105 Ethereum projects in the directory, drawn from open-source repositories building on x402 and agent payments. The list above is sorted by GitHub stars and updates as new projects are submitted and crawled.
x402 is an open standard for paying for an HTTP resource: a server replies with HTTP 402 and payment terms, the client pays (usually USDC), and the request is fulfilled. The Ethereum projects above implement or build on this flow.
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