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.
# 1. Ask the endpoint what it costs (no payment, no wallet needed): curl -i -X POST 'https://api.immuta.app/seal' # -> HTTP/1.1 402 Payment Required # the response carries the price, asset and pay-to address. # 2. Pay and retry with any x402 client: npx x402-fetch -X POST 'https://api.immuta.app/seal'
Endpoint: https://api.immuta.app/seal. Operated by api.immuta.app, not by Animica. Price and availability were correct at the last probe on 2026-09-02 and are set by the operator, who may change them.
Resolve any Unix timestamp to the exact PulseChain block at or nearest that moment (binary search, precise to one block). Supports before/after modes. Useful fo…
Latest PulseChain block number and Unix timestamp, served from live chain state. $0.001 per call via x402 (USDC on Base).