erc8004-agent-identity SKILL.md skillA
erc8004-agent-identity from nirholas/three.ws is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add nirholas/three.ws/erc8004-agent-identity@git:20260730.f960d66Pins git:20260730.f960d66 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- nirholas/three.ws
- Path
data/skills/protocol/erc8004-agent-identity/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260730.f960d66, committed Jul 30, 2026
- First version recorded
- May 1, 2026
- Size
- 6,293 bytes
- Repository stars
- 269
- License
- Apache-2.0
Complete guide to ERC-8004: the open standard for on-chain AI agent identity, reputation, and validation. Covers agent registration as NFTs, reputation signals, validator attestations, and multi-chain deployment across 12 chains. Essential for building trustless AI agent ecosystems.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# ERC-8004: On-Chain AI Agent Identity ERC-8004 is an open Ethereum standard for **discovering, choosing, and interacting with AI agents** across organizational boundaries without pre-existing trust. It was created by the Sperax team and is deployed across 12 chains. **Spec**: https://eips.ethereum.org/EIPS/eip-8004 ## Why ERC-8004? As AI agents proliferate, we need a way to: - **Discover** agents across platforms (not locked in one vendor) - **Verify** agent capabilities and track record - **Trust** agents without knowing who built them - **Pay** agents via standard protocols (x402, on-chain) ERC-8004 solves this with three on-chain registries. ## The Three Registries ### 1. Identity Registry (ERC-721 NFT) Every agent gets an **NFT identity**: a unique, transferrable on-chain identity. - Based on ERC-721 with URIStorage - TokenURI points to a JSON registration file - Owners can update metadata, transfer, or burn - One NFT = one agent identity ### 2. Reputation Registry A standard interface for posting and querying **feedback signals** about agents. | Signal | Measures | Scale | |--------|----------|-------| | `starred` | Quality rating | 0-100 | …
Read the whole file at its exact version.
How to install
mdr add nirholas/three.ws/erc8004-agent-identity@sha256:fcb227a493761fccThe line at the top of this page pins the label git:20260730.f960d66, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_254xhuoz74kw2w7q)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between May 1, 2026 and Jul 30, 2026, about one every 90 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260730.f960d66 latest | 2026-07-30 | f960d66 | 6,293 B | A | view · diff |
| git:20260501.87cefc9 | 2026-05-01 | 87cefc9 | 6,330 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (6293 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
nirholas/three.ws · 269 stars · license Apache-2.0 · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_254xhuoz74kw2w7q GET https://markdownregistry.com/api/v1/resolve?ref=nirholas/three.ws/erc8004-agent-identity GET https://markdownregistry.com/api/v1/blob/fcb227a493761fcc185f8edab07a43ec500f2e8a39c54764f0022920f3bef6ba
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.