Flash402
Console
Live on Base Sepolia

Turn any API into a
pay-per-call endpoint

An onchain USDC paywall for your API. Paste a URL, set a price, share the link, get paid. No accounts, no keys, no code.

Monetize an APIWatch it get paid

402 Payment Required → sign → 200 OK · settled in USDC

GET /api/gw/<id>
1 · unpaid requestHTTP 402
{
  "x402Version": 2,
  "error": "Payment required",
  "accepts": [{
    "scheme": "exact",
    "network": "eip155:84532",
    "amount": "10000",
    "asset": "0x036C…F7e (USDC)",
    "payTo": "0x1111…1111"
  }]
}
2 · paid requestHTTP 200
{
  "amount": 1,
  "base": "USD",
  "date": "2026-07-02",
  "rates": { "EUR": 0.87727 }
}
// ↑ upstream response, unlocked
//   0.01 USDC settled onchain

Real trace, captured on Base Sepolia.

From free API to paid in 3 steps

See it in action

Watch a plain API become a paid, onchain-settled endpoint in one flow.

Made for the agent economy

Zero code

A proxy sits in front of your API. No SDK, no rewrite, your endpoint's behaviour is untouched.

Onchain settlement

Payments settle in USDC on Base via the x402 facilitator. No middleman account.

True pay-per-call

No subscriptions, no tiers. Callers pay for exactly the requests they make.

Agent-ready

AI agents pay programmatically over HTTP 402, the native rail for agentic commerce.

Live earnings

Every paid call is counted, so you always see what each endpoint is making.

Any endpoint

Path, query and method are forwarded through untouched to your upstream.

FAQs

Put a price on your API in 30 seconds

Spin up a gateway, run a real testnet payment, and watch the USDC land.

Launch the console