Pay-per-use credential verification on Hedera
Upload a certificate, pay with x402, and receive a tamper-aware verification report backed by Hedera Consensus Service.
4f9c28e3b0a7…7c9d6f2a91e3
Sample anchored credential — example content, not the result of a live verification. Upload a file to run a real one.
Live Hedera activity
How Cred402 works — quick preview
- 1
Upload
Upload any certificate (PDF, PNG, JPG). We hash it server-side — the file is never stored.
- 2
Pay via x402
The report is gated by a genuine HTTP 402. Settle a small pay-per-use fee in testnet HBAR.
- 3
Get Report
Receive a deterministic, tamper-aware report backed by Hedera Consensus Service proof.
Downloadable sample certificates
Watch a verdict flip from VALID to TAMPERED
Anchor an original file, change a single byte of a copy, and re-verify. Because both are checked against the same Hedera-anchored proof, the modified copy is provably tampered.
- Upload an original file
- Anchor its proof on Hedera
- Modify a local copy
- Upload the modified version
Synthetic demo on Hedera testnet. It proves a file changed after anchoring — not that the uploader is a real issuer or owner.
4f9c28e3b0a7d1f6 92c4a8e5b3d7f019
a1b2c3d4e5f60718 29e0d1c2b3a49586
Same anchored proof · one changed byte · a different SHA-256