Charge cents — or fractions of a cent — per request.
Micropayments were impractical with card rails: fees dwarfed the amount. x402 + stablecoins change that, making per-request pricing of a few cents — or fractions of a cent — viable at last. These projects implement micropayment metering, per-request billing and settlement for APIs and agents.
Here are the micropayment projects in the directory.
Real projects from the directory · stars live from GitHub · sorted by popularity. Showing the top 60 of 128.
The agent-native LLM router for OpenClaw. 41+ models, <1ms routing, USDC payments on Base & Solana via x402.
The AI agent with a wallet — spends USDC autonomously to get real work done. Apache-2.0, TypeScript.
DePIN for Vintage Hardware — Proof-of-Antiquity blockchain where old machines outmine new ones. AI-powered hardware fingerprinting, 15+ CPU architectures, Solana bridge (wRTC). $0 VC.
🚀 Curated list of x402 resources: HTTP 402 Payment Required protocol for blockchain payments, crypto micropayments, AI agents, API monetization. Includes SDKs (TypeScript, Python, Rust), examples, facilitators (Coinbase, Cloudflare), MCP integration, tutorials. Accept USDC payments with one line of code. Perfect for AI agent economy.
Client SDK for the Vybe x402 API. Pay-per-call USDC over HTTP and prepaid-credit WebSocket streaming for Vybe's Solana analytics API. Built for AI agents.
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.
MCP server for Run402 — AI-native Postgres + REST + auth + storage + static sites. Pay with x402 USDC on Base. No signups.
The MPP registry — 100+ Machine Payments Protocol tools, SDKs, services, and payment methods across 15+ chains. The definitive directory for Stripe + Tempo agent payments.
ClawRouter for Hermes — 55+ LLMs, x402 USDC micropayments on Base & Solana. Python plugin wrapping the ClawRouter proxy for NousResearch/hermes-agent.
MCP Server for Lightning Faucet - Give your AI agent a Bitcoin wallet
Universal MCP gateway for AI agents — 1108 tools, 307 providers. One endpoint (https://apibase.pro/mcp), pay-per-call with x402 USDC on Base + MPP USDC on Tempo.
Proxies.sx marketplace where your agents can earn money by building services with our infrastructure
DNA — Payment rails for AI agents. x402 micropayment protocol on Solana. Netting, transfer, stream settlement. Receipt anchoring on-chain.
🚀 The Rosetta Stone for Agentic Payments - One vending machine, 5+ protocol implementations. Get from zero to working agentic payments in 5 minutes.
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
Unified payment execution layer for Stellar x402, MPP charge, MPP session behind one client.pay() call
APIMesh — 23 pay-per-call web analysis APIs + 16-tool MCP server with autonomous API generation. Security audits, SEO, tech stack detection. x402 + Stripe MPP payments.
The x402 Service Encyclopedia — Every service ranked, reviewed, and documented. Community knowledge base for the AI agent economy.
APIMesh — 23 pay-per-call web analysis APIs + 16-tool MCP server with autonomous API generation. Security audits, SEO, tech stack detection. x402 + Stripe MPP payments.
Connect OpenClaw agents across teams and enterprises to share, discover, and collaborate on custom automation tools securely and efficiently.
⚡ The gold standard for x402 resources. 300+ projects, SDKs, tools, facilitators, and ecosystem data for the HTTP 402 Payment Required protocol. Curated by 24K Labs.
Payment infrastructure for AI agents. Reference implementation: x402 + MPP + fiat.
x402 payment gateway integration demo for x402 infrastructure, using x402 protocol.
The commerce layer for the x402 agent economy — micropayments for AI agents on Base and Solana
A Solana-powered multi-LLM gateway with pay-per-request micropayments using the x402 protocol. Allows any app to access GPT, Claude and other LLM models through a trustless 402 Payment Required flow with on-chain verification.
"Machines must run." — Open-source protocol & trust layer for AI agent commerce. Discover, verify, transact — no middlemen.
x402 protocol API server — pay-per-call DeFi data endpoints using USDC micropayments on Base
One-line API monetization for AI agents. Pay-per-request USDC payments via x402. Express, Next.js, MCP.
Build x402-paying agents in 5 minutes - Complete TypeScript monorepo with working agent examples
AI Provider Templates & Docs for Handshake58 — Bittensor Subnet 58 powered by DRAIN Protocol
AI agent skill marketplace - where agents buy and sell capabilities from each other
MCP server for x402 Service Discovery — continuously growing catalog of services, real-time quality signals, facilitator-compat checks. For Claude, Cursor, Windsurf.
MCP server for AskClaude — pay-per-query Claude AI via x402 micropayments
x402 payment protocol implementation in .NET - enable AI agents to pay for your APIs with USDC micropayments
x402 Payment Protocol SDKs - Dead simple micropayments for APIs and AI agents
Wallet-signed, pay-per-request data utilities (CSV validation, data cleaning, PDF extraction) using the x402 HTTP payment flow.
Infrastructure primitives for autonomous agents. No signup. No GUI. No KYC. Pay with USDC, get resources.
Automatic micro-donations powered by x402. Drop-in Express/Next.js middleware that sends USDC to charities on every user action. npm install x402charity.
A curated list of tools, protocols, platforms, and resources for monetizing MCP servers
Decentralized Runtime for AI Networks - Trustless micropayments for AI agents
AutonomiX is a Web3 platform combining x402 micropayments and ERC-8004 agent NFTs for decentralized AI agents, on-chain reputation, and secure paywalled APIs on Base Sepolia.
Any API becomes a Lightning toll booth in one line. L402 middleware for Express, Hono, Deno, Bun, and Workers.
Apollo Intelligence MCP Server — 36 AI-curated data tools via x402 micropayments. OSINT, DeFi, economic data, security, weather, ML/NLP, and proxy infrastructure. Official MCP Registry: team.apolloai/intelligence
Multi-chain settlement cost router for the x402 payment protocol. Selects the cheapest or fastest blockchain for each AI agent micropayment.
⚡ Route requests to the most cost-effective model with ClawRouter—one wallet, over 30 models, no API keys needed.
Pay-per-use WireGuard VPN gateway for autonomous agents. No subscriptions, no pre-auth — each access is gated by a USDC micropayment verified on Base.
Streamline content creation with WriterClaw by generating, editing, and managing text efficiently across multiple languages and formats.
Enable Virtuals AI agents to store, search, and manage persistent memory using MoltBrain micropayments on the Base blockchain.
A Next.js proxy implementing end-to-end x402 gateway integration — enabling payment-gated APIs and resources with on-chain USDC settlement on Solana, no accounts required.
AI-powered vibe check for online dating profiles. Pay once, know who’s real. Built with Solana x402 for safer, ad-free digital trust.
Bloomberg Terminal of the AI Agent Economy — x402 micropayment routing, 31 AI providers, smart pricing oracle on Base
A technical specification for the Open Commerce Protocol (OCP), an extensible HTTP API for digital commerce. Supports universal clients, capability discovery, structured metadata, and web3-native payments via x402 Protocol for instant blockchain transactions.
On-chain security and market intelligence for AI agents on Base — 14 services via x402, MCP, A2A, and ACP. EIP-712 signed attestations.
Hybrid x402 + Stripe machine payments: agents pay USDC via x402, Spraay executes multi-chain DeFi ops, Stripe settles fiat for merchants
We currently track 128 Micropayments 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 Micropayments projects above implement or build on this flow.
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