Every agent transaction ends in proof.

The settlement assurance layer for the agent economy.

Card rails have chargebacks. Agent rails have nothing.

Card networks spent fifty years building the proof layer that lets strangers transact: chargebacks, dispute rights, liability frameworks. Agent payment rails settle instantly and finally, with none of it. No recourse, no evidence standard, no answer to "the agent bought the wrong thing." Quitanza is the recourse layer.

How a matter closes

Escrow. The payer locks funds against Terms: declarative, machine-readable acceptance criteria fixed before any work begins.
Delivery. The provider submits a result, content-addressed and signed. What was delivered is no longer a matter of memory.
Verdict. Verification judges the delivery against the Terms, deterministically, check by check, and records every reason.
Recourse. A failed verdict opens the dispute funnel: structured challenge, content-addressed evidence, a ruling. Release, refund, or split.
Proof. However the matter closes, a quitanza is issued: signed, hash-chained to the full evidence trail, independently verifiable, non-repudiable.

Run the whole flow locally in five minutes →

For developers

Escrow, verification, and disputes for agent payments. x402-compatible, protocol-agnostic, one SDK away.

import { Quitanza } from "@quitanza/sdk";

const qz = new Quitanza({ baseUrl: "http://localhost:4280" });

const escrow = await qz.escrows.create({
  payerAgentId: buyer.id,
  payeeAgentId: provider.id,
  amount: "25.00",
  asset: "USDC",
  terms: { description: "the agreed report, exactly",
           checks: [{ kind: "hash", expected: contentHash(payload) }] }
});

await qz.escrows.fund(escrow.id);
await qz.escrows.submitDelivery(escrow.id, provider.id, payload);

const proof = await qz.quitanzas.forEscrow(escrow.id); // → the quitanza

The flagship webhook is quitanza.issued. Full API reference →

Product lines

Quitanza EscrowNon-custodial funds locked against machine-readable terms.
Quitanza VerifyDeterministic delivery verification, every reason recorded.
Quitanza DisputesStructured recourse at machine speed.
Quitanza TrailThe tamper-evident evidence trail. Free.
Quitanza ControlAudit-grade oversight of what your agents did with money.

An old instrument, restored

In 1289 a settled merchant walked away with a quitanza, the creditor's document proving the debt discharged. The matter was provably closed for both sides. Quitanza restores that instrument, as cryptography. Read the manifesto →