erc721-ai

Token standard for tokenized fine-tuned AI model weights — ownership, provenance, and tradability

kcolbchain — open-source blockchain tools and research since 2015.

Status

Early development. Looking for contributors! See open issues for ways to help.

Quick Start

git clone https://github.com/kcolbchain/erc721-ai.git
cd erc721-ai
# Setup instructions coming soon

Contributing

See CONTRIBUTING.md for how to get started. Issues tagged good-first-issue are great entry points.

Draft Specification

The v0 draft of the ERC-721 AI standard is in docs/spec-erc721-ai.md. It defines the metadata schema (model id, weights CID, artifact hash, base-model provenance, license, inference endpoint, royalty), the required interface, and the ERC-2981 + attestation-hook integration.

Reference Implementation

• contracts/ERC721AI.sol — minimal, dependency-free reference that implements the full ERC-721 AI surface (mintModel, modelAsset, setInferenceEndpoint, setAttestationKind, royaltyInfo) plus the ERC-721 subset needed for it to render in standard wallets.
• test/ERC721AI.t.sol — Foundry tests covering mint, provenance chain lookup, royalties, endpoint mutation, attestation kind mutation, transfer semantics, and revert paths.

Production deployments SHOULD substitute an audited ERC-721 base (OpenZeppelin) and inherit ERC721AI behavior — this reference optimizes for clarity, not bytecode size.

Attestation Hook (ZK / TEE)

This repo also includes a pluggable contract-level attestation hook for verifiable training claims:

• contracts/interfaces/ITrainingAttestationVerifier.sol
• contracts/mocks/MockTrainingAttestationVerifier.sol
• contracts/ERC721AIAttestationHook.sol

Design and integration details are documented in docs/attestation-hook.md.

TypeScript SDK

A viem-based TypeScript SDK for the standard lives in sdk/typescript/ — it wraps ERC721AI, ERC721AIx402Metering, and ERC721AIAttestationHook behind three modules (model, metering, attestation) so consumers can mint a tokenised model, set an inference price, pay per call, and withdraw revenue in roughly five lines of code. See sdk/typescript/README.md for the quickstart.

Links

• Docs: https://docs.kcolbchain.com/erc721-ai/
• All projects: https://docs.kcolbchain.com/
• kcolbchain: https://kcolbchain.com

License

MIT

---

Founded by Abhishek Krishna • GitHub: @abhicris