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
eip155:8453
Category
verification/notary
Provider
Immuta
Source
bazaar
Indexed
2026-07-14 14:15:38
Health
Status
healthy
Latency (p50)
614ms
Uptime (30d)
100.0%
Reliability Score
90/100
Last Checked
2026-08-28 19:47:07
Last Healthy
2026-08-28 19:47:07
Consecutive Failures
0
x402 Payment Validation
Payment Requirements
Valid
Asset Verified
Known USDC
Facilitator
—
Recent Health Checks
| Time | Status | HTTP | Latency | Error |
|---|---|---|---|---|
| 2026-08-28 19:47:07 | healthy | 402 | 550ms | |
| 2026-08-28 13:25:26 | healthy | 402 | 466ms | |
| 2026-08-28 02:14:17 | healthy | 402 | 479ms | |
| 2026-08-27 21:48:35 | healthy | 402 | 614ms | |
| 2026-08-27 12:31:59 | healthy | 402 | 467ms | |
| 2026-08-27 08:24:21 | healthy | 402 | 477ms | |
| 2026-08-26 22:00:52 | healthy | 402 | 1266ms | |
| 2026-08-26 15:03:27 | healthy | 402 | 833ms | |
| 2026-08-25 23:23:13 | healthy | 402 | 1322ms |