Developer API
Invoance gives your application a cryptographic proof layer. Every event you send is hashed, signed, and written to an append-only ledger, independently verifiable by anyone, without an Invoance account.
https://api.invoance.com/v1Bearer invoance_live_xxxContent-Type: application/jsonHow it works
Send
POST an event, document, or AI output to the API. The SDK handles hashing and encoding.
Anchor
Invoance computes a SHA-256 hash, signs it with Ed25519, timestamps it, and writes it to the ledger.
Verify
Anyone can recompute the hash and validate the signature, no Invoance account required.
What you can anchor
Business events, approvals, state changes, audit-critical actions.
Files of any type. The SDK hashes and encodes them before anchoring.
Bind model name, prompt, and output into a single signed record.
Group events, documents, and AI attestations into a sealed, verifiable process proof.
Customer-facing, signed activity logs your customers can search, stream, export, and verify offline.