x402 protocol
x402
Facilitator
Drop-in x402 payment facilitator.
No CDP keys. No infrastructure. Just a URL.
// One line. That's it.
const facilitator = new HTTPFacilitatorClient({
url: 'https://x402facilitator.dev/api/facilitator/v2/YOUR_API_KEY'
});
How it works
01
Deposit USDC
Pay via x402 to fund your account. $2.50 minimum.
02
Get your facilitator URL
Instantly receive a unique URL that’s drop-in compatible with HTTPFacilitatorClient.
03
Ship your x402 app
Use the URL in your app. We handle settlement with Coinbase CDP. $0.01 per settle.
Pricing
| Operation | Cost |
|---|---|
| settle | $0.01 |
| verify | free |
| supported | free |
CDP settle costs $0.001 after 1,000 free/month. We charge $0.01.
Built for agents
Every endpoint is designed for AI agents via x402 MCP tools.
Full instructions at /llms.txt
POST /api/deposit
x402 payment → facilitator URL
GET /api/balance
SIWX auth → account details
POST /api/signers
SIWX auth → add wallet
/.well-known/x402
x402 discovery document