Stripe for agent payments.
Wrap any API in x402 and sell per-call access — to humans or AI agents. No accounts, no subscriptions. We host the rail; you keep the revenue.
Settled in USDC on Solana · 1% per transaction
Two worlds, one rail
Who are you here as?
List, browse & earn.
Wrap your API, set a per-call price, and track revenue from one dashboard — or browse the marketplace and buy per call. We provision a wallet for you if you don't have one.
Pay per call. No account.
An agent can't fill out a checkout — but it can sign a stablecoin payment. Hit a gated endpoint, get a 402, pay, retry. That's the whole integration.
$ curl …/x/fetch-x-post → 402
$ x402.pay().retry() → 200 OKHow it works
The toll booth for the agent economy.
List your API
Register your origin URL and a per-call price. We generate an x402-gated proxy URL — no invoicing, no subscriptions.
Buyers pay per call
Humans and AI agents hit your endpoint and pay per request with a stablecoin. No account required to buy.
You get paid
We verify payment on-chain, forward the request, and settle your earnings — minus our 1% margin.
Built for both sides
Everything you need to sell, buy, and settle.
Hosted x402 rail
We issue the 402, verify the on-chain payment, and forward to your origin. You run none of it.
Embedded wallets
Buyers without a wallet get one provisioned on login, so anyone — human or agent — can pay.
Instant USDC settlement
Paid per call in USDC on Solana — fast, cheap finality built for high-volume commerce.
Earnings dashboard
Live calls, revenue, and payouts. No spreadsheets, no monthly invoicing.
REST + webhooks
Manage listings over a clean API and stream every paid call to your own infrastructure.
Public marketplace
Get discovered. List once and let humans and agents find and buy your API.
What sells on theopay
Any API an agent would pay to call.
Inference & embeddings
Sell model calls per request — agents pay only for what they use.
Market & sentiment data
Real-time prices, signals, and sentiment scoring, metered per call.
Geocoding & enrichment
Lookups, enrichment, and reference data without subscriptions.
Scraping & search
Search, crawl, and extract endpoints agents can hit on demand.
Why x402
The native payment rail for the agent internet.
HTTP 402 "Payment Required" has been a reserved status code for decades. x402 finally makes it real: a standard way for any client — human or autonomous agent — to pay for a single request with stablecoin, no account or checkout. theopay is the marketplace and tooling layer on top of that rail.
Turn your API into revenue.
Sellers bring the supply, buyers bring the demand. We host the rail and take 1%.