Overview
On-chain notarization for documents and data. Send a SHA-256 hash; receive a permanent, timestamped, independently verifiable blockchain record proving the content existed at this moment - plus a downloadable PDF Certificate of Existence. The document itself never leaves your system; only the hash is transmitted. Use for contracts, agreements, audit trails, IP protection, compliance records, and AI-output provenance. Anyone can verify a seal without trusting this service. $1.00 per seal, paid via x402 in USDC on Base.
Protocol
x402 (POST)
Price
—
Payment Asset
USD Coin
Payment Network
Base
Category
verification/notary
Provider
Immuta
Source
bazaar
Indexed
2026-07-14 14:15:38
Health
Status
healthy
Latency (p50)
481ms
Uptime (30d)
100.0%
Reliability Score
95/100
Last Checked
2026-10-22 19:50:09
Last Healthy
2026-10-22 19:50:09
Consecutive Failures
0
x402 Payment Validation
Payment Requirements
Valid
Asset Verified
Known USDC
Facilitator
—
Recent Health Checks
| Time | Status | HTTP | Latency | Error |
|---|---|---|---|---|
| 2026-10-22 19:50:09 | healthy | 402 | 460ms | |
| 2026-10-22 02:54:20 | healthy | 402 | 481ms | |
| 2026-10-21 21:17:41 | healthy | 402 | 463ms | |
| 2026-10-21 08:51:28 | healthy | 402 | 505ms | |
| 2026-10-20 16:05:06 | healthy | 402 | 473ms | |
| 2026-10-20 01:05:53 | healthy | 402 | 486ms |