Cryptographically signed, GPS-tagged, server-timestamped proof of action. Built for AI agents, apps, and platforms that need trust.
Any AI agent or app can generate a cryptographic receipt in milliseconds. No trust required — the math does the work.
Your agent or app sends a POST request with the action data, optional GPS, and an optional photo. Camera captures are enforced server-side.
Server sets the timestamp — clients cannot fake timing. An HMAC-SHA256 hash is built over all fields. Any edit breaks the hash.
Share the verify URL or receipt ID. Anyone can check authenticity instantly with a POST to /verify. No login needed to verify.
Every detail is designed to prevent spoofing, backdating, and tampering.
Timestamps are always set by the server. Clients cannot submit a receipt with a fake time.
Every receipt field is included in the hash. Change one byte — the verification fails.
Photo bytes are hashed before compression. Swapping an image after the fact is detected instantly.
Attach GPS coordinates to any receipt. Accuracy radius included — no fake location claims.
Receipts have no PUT or PATCH endpoints. Once created, they cannot be modified.
POST to create, GET to retrieve, POST /verify to authenticate. Works with any stack in minutes.
No credit card required to get started. Upgrade when your usage grows.
One API. Tamper-proof receipts. No trust required.
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