24-hour receipts your agents can check before they act.

Issue a signed receipt when something happens. Your agents verify it before taking action. No receipt, no action. Receipts expire automatically — no stale state, no replay attacks.

Sample Receipt

ProofSlip

Verified

rct_7f3k9x2m

Typeaction

Statussuccess

Refund of $42.00 issued to customer #8812

CreatedMon, 23 Mar 2026 12:00:00 GMT

ExpiresTue, 24 Mar 2026 12:00:00 GMT

> view payload

{
  "customer_id": 8812,
  "refund_amount": 42.00,
  "currency": "USD",
  "reason": "duplicate_charge",
  "initiated_by": "agent/billing-v2"
}

How It Works

Create

Your system issues a receipt when a significant event occurs — a payment processed, an approval granted, a handshake completed.

# POST /v1/receipts
{
  "type": "action",
  "status": "success",
  "summary": "Refund of $42.00 issued to customer #8812",
  "idempotency_key": "refund-8812-2026-03-23"
}

Verify

Before taking action, your agent checks the receipt. A valid receipt confirms the prerequisite event actually happened.

# GET /verify/rct_7f3k9x2m
{
  "id": "rct_7f3k9x2m",
  "type": "action",
  "status": "success",
  "valid": true,
  "expires_at": "2026-03-24T12:00:00Z"
}

# or view the styled receipt in the browser ↗

Expire

Receipts automatically expire after 24 hours. Expired receipts return invalid — your agents know the authorization window has closed. No manual cleanup required.

Receipt Types

action

Confirm a side-effectful operation completed — a payment, a write, a deletion. Downstream agents verify before proceeding.

approval

A human or system approved a request. The receipt proves the approval exists and hasn't expired before the agent acts on it.

handshake

Two agents or services acknowledged each other. Useful for multi-step orchestration where each step must confirm the previous.

resume

A paused workflow is cleared to continue. The receipt gates re-entry, preventing double-execution after interruption.

failure

Record that something failed in a verifiable way. Downstream agents can check whether a known failure is still within its reporting window.

Get your API key

Free tier — 500 receipts/month. No credit card.