The only trustless payment protocol for autonomous agents.
Atomic. Non-custodial. Permissionless.
Agents pay for data and services without trusting anyone. Cryptographic guarantees replace terms of service. Payment and delivery are mathematically atomic.
Agents can't call customer support.
Current payment protocols assume a human is watching. Autonomous agents need cryptographic guarantees, not terms of service.
Payment before delivery
Agents sign irrevocable payments before any data arrives. At machine speed, hope is not a strategy.
Trusted facilitators
A single entity controls settlement — with the power to steal, censor, or front-run every transaction.
No recourse
When the merchant ghosts, the payment is gone. No dispute. No refund. No resolution.
Atomic by construction.
Payment and data delivery happen as one indivisible action. Neither party can cheat.
The merchant can only receive payment by delivering the data. The agent can only access the data by confirming payment. No trust required.
Built on Circle. Multi-chain by design.
USDC-native gas on Arc. Same protocol across every EVM chain.
Arc
Other chains
One token. Gas and payments. No volatility.
Three lines of code. Full atomic payments.
Your agent sees fetch(). Your server sees route handlers. The entire protocol is invisible.
npm install @payproof/client @payproof/contractsconst client = createPayproofClient({
chains: { evm: { privateKey: "0x..." } },
});
const fetch = client.getFetchWithPayment();
const data = await fetch("https://api.example.com/data")
.then(r => r.json()); // decrypted automaticallynpm install @payproof/server @payproof/contractsconst server = createPayproofServer({
chains: { evm: { merchantAddress: "0x..." } },
});
const middleware = createNextMiddleware(server, {
"/api/data": { accepts: server.multiChainAccepts("$0.01") },
});
// encryption + settlement is automaticWhere we are. Where we're going.
Foundation
- •Atomic payment protocol on Arc Testnet
- •SDK published
- •Reference marketplace
- •Full protocol spec
Developer Experience
- •Arc mainnet deployment
- •CLI tooling
- •MCP + OpenAI + LlamaIndex integrations