Data APIs your
agents pay for.
Weather, finance, web search, company lookup, sentiment, WHOIS — every endpoint metered per call in USDC on Base. No accounts, no API keys. Your agent gets a 402, signs once, and the data comes back.
Turn your API into a vending machine.
Agents pay per call. No billing portal, no invoices, no Stripe. You keep 100% of the revenue at launch.
Paste your endpoint, set a price, connect a Base wallet. 60 seconds.
We return HTTP 402, settle USDC on-chain, and retry with a signature.
0% platform fee. Funds land directly in your wallet — no middlemen.
RapidAPI takes 20%+. Stripe charges ~$0.30 per transaction — impossible at sub-cent pricing. Vend402 settles USDC on Base for fractions of a cent.
Three steps. Milliseconds.
AI agent hits your endpoint with no payment header.
Gateway responds with price, currency, and destination wallet.
Agent settles USDC on Base and retries with a signature.
Real-time on-chain receipts.
Every call to the gateway is logged. These numbers update live.
Try the gateway.
Hit the endpoint with and without a payment signature and watch the 402 handshake unfold.
GET /api/x402/weather0x8b32651A04A12f72a2dC9F25c4dD938A9D30bAD6# 1. Probe the endpoint
curl -i /api/x402/weather
# → HTTP/1.1 402 Payment Required
# → body.accepts[0] = { scheme:"exact", network:"base-sepolia", maxAmountRequired:"1000", payTo:"0x8b32651A04A12f72a2dC9F25c4dD938A9D30bAD6", asset:"USDC" }
# 2. Sign an EIP-3009 USDC authorization, base64-encode the payment payload, retry
curl -i /api/x402/weather -H "X-PAYMENT: <base64 payload>"const res = await fetch("/api/x402/weather", {
headers: { "X-PAYMENT": paymentHeaderB64 },
});
const data = await res.json();