The universal notary for AI decisions — post-quantum, on-chain, re-verifiable proof of what any model decided, on what input, when. For any industry: banking, insurance, healthcare, hiring, moderation, trading, crypto/CASP, public sector. Evidence that ou

Anchor IDL + TypeScript types for the Extol extol-attestation program (SAS binding + Attestation Notary v0.2 non-walkability).

Node-RED Nodes to work with a Greenhouse Gas notary service for certification of emission events (like charging sessions) or metered readings.

Although RPC to a Notary server may be facilitated via regular HTTP calls, for added DX and typesaftey, you can use these official client bindings.

QuantaBit Contract SDK - Contract creation, signing, deployment and on-chain notary

Open source CLI for verifying agentsystems-notary logs against Arweave blockchain

The licensing notary: distribute any SPDX license, notarize a project's LICENSE against the canonical text, and gate your own packages with offline signed registration. Deployment identity + license attestation.

A common library used by notary-core & all of the plugins for a PubSub-like communications flow

Library for signing requests and verifying signatures on the Open Charging Network

JS library for TLS Notary

Agent steward infrastructure — hash-chained audit log, Merkle notary, and GDPR/AI-Act compliance skill.

A disinterested witness to a chain head. Counter-signs the head of a hash chain so that rewriting history becomes detectable by someone with no stake in the answer.

o1js implementation of TLS Notary verifier

Chain-agnostic blockchain notarization library for Majik Signature. Creates independently verifiable proof-of-existence by anchoring sealed file hashes on-chain, with an initial implementation using the Solana blockchain.

Thin typed wrapper over the Mintrail Notary HTTP API.

package for tlsn notary proof verification in wasm

Web3 attestations, IPFS, and verification

Waterproof cryptographic proof-of-existence. SHA-256 + HMAC document notarization with Merkle tree batching, hash-chained audit logs, and multi-signature verification. Zero dependencies.

Hash and signature engine for the Bedrock immutable advice ledger — computes and verifies record hashes, chain hashes and ECDSA P-256 signatures.

The notary for AI-assisted authorship. Prove who directed the work — your content never leaves your machine, only its fingerprint does. Seal via MCP or CLI; verify offline, forever.