A curated list of awesome x402 protocol projects, tools, and resources for AI agent commerce.
x402 is an open payment protocol (initiated by Coinbase) that turns HTTP 402 "Payment Required" into a real payment flow. AI agents pay for API calls with USDC micropayments on Base network — no API keys, no subscriptions.
Stripe just launched x402 support on Feb 10, 2026, making this the standard for machine-to-machine payments.
- Protocol & Standards
- Facilitators
- Services & Endpoints
- SDKs & Libraries
- MCP Servers
- Tools & Infrastructure
- Ecosystem Platforms
- Learning Resources
- Community
- x402 Protocol Spec - Official x402 protocol specification by Coinbase.
- x402.org - Official x402 protocol website and documentation.
- ERC-8004 - ERC standard for agent-native commerce (related).
Facilitators verify payments and enable the x402 flow.
| Name | Network | Currency | Status |
|---|---|---|---|
| Coinbase x402 | Base | USDC | ✅ Live |
| Stripe x402 | Base | USDC | ✅ Live (Preview) |
Projects offering pay-per-call APIs via x402.
| Name | Description | Endpoints | Settlement | Status |
|---|---|---|---|---|
| AsterPay | EUR settlement layer for AI agent commerce. Market data, sentiment, DeFi analytics, whale tracking, and more. | 13 | EUR (SEPA Instant) | ✅ Live |
| CDAS | Crypto Data Analytics Service | - | USDC | ✅ Live |
| JMT x402 Agent Tools | 25 paid endpoints: web search, AI analysis, crypto data, SEC filings, company intel, news briefing, sentiment, macro dashboard. USDC on Base. | 25 | USDC (Base) | ✅ Live |
Add your project! Open a PR to add your x402-enabled service.
- @x402/fetch - Drop-in replacement for
fetch()that handles x402 payments automatically. - @x402/express - Express middleware for x402 payment gating.
- @asterpay-io/x402 - AsterPay x402 middleware with EUR settlement.
MCP (Model Context Protocol) servers that enable AI agents to interact with x402 services.
| Name | Package | Description |
|---|---|---|
| AsterPay MCP Server | @asterpay/mcp-server |
13 data endpoints for Claude, Cursor, and MCP-compatible AI agents. |
- x402scan.com - x402 ecosystem explorer. Tracks live x402 endpoints, transaction volumes, and reliability.
- x402.eco - Community-built ecosystem directory for x402 services.
Platforms where x402 services are listed or integrated.
| Platform | Type | AsterPay Listed |
|---|---|---|
| Coinbase x402 Ecosystem | Official directory | ✅ Yes |
| x402scan.com | Endpoint tracker | ✅ Yes |
| Bankr OpenClaw | AI agent skills | 🔄 PR #123 |
| Circle Arc | USDC ecosystem | 📝 Submitted |
| ClawGig | AI agent marketplace | ✅ Registered |
| mcp.so | MCP server directory | 📝 Pending |
| glama.ai | MCP server directory | 📝 Pending |
- x402 Protocol Documentation - Official docs.
- How to Charge AI Agents for Your API - Tutorial on DEV.to.
- Stripe Machine Payments Announcement - Jeff Weinstein's thread on Stripe x402.
- Why EUR Settlement Matters for x402 - AsterPay's guide for European developers.
- Coinbase Developer Discord - Official
#x402channel. - Telegram: AsterPay Community - AsterPay community.
- Twitter/X: @Asterpayment - AsterPay updates.
Contributions welcome! Read the contribution guidelines first.
To add your x402 project:
- Fork this repo
- Add your project to the relevant section
- Open a Pull Request
This list is released into the public domain.