Inspect an agent's on-chain identity before paying it.
Most x402 quotes identify a destination and amount, but not whether the seller's claimed agent identity has any visible history. This free, read-only Arc ERC-8004 cross-check talks directly to Arc's canonical identity and reputation registries; it does not rely on a third-party score as proof and never approves a payment.
Read the Arc registry
Enter a public Arc ERC-8004 agent ID (e.g. 0). Click once to make read-only JSON-RPC requests. No secret keys, login, payment signatures, wallet approvals, analytics, cookies, tracking or server-side upload. The ID and your IP are visible to the publicly operated Arc RPC when you click.
Decision: MANUAL REVIEW REQUIRED — never "safe to pay"
Evidence limits and next steps
Exactly what is read
- Live
eth_chainIdandeth_blockNumberfrom Arc mainnet RPC; the tool refuses a network other than chain 5042. - ERC-8004 identity
ownerOf(agentId)andtokenURI(agentId)from the canonical Arc identity registry (0x8004A169...39a432). An on-chain JSONdata:registration can be decoded locally; external registration URLs are never fetched automatically. - Canonical Arc reputation
getClients(agentId)andgetSummary(agentId, clients, "", "")using the unfiltered public client list (up to 64 entries). This is not a sybil-resistant allow-list or independently verified payer evidence. - No signing RPC, wallet connection, trusted-decision API, private network scans or untrusted external profile downloads. All on-chain metadata is rendered as inert text. Only the official Arc RPC is in the page's network allow-list.
Need payment-header troubleshooting too?
A correct registry ID does not validate the HTTP 402 quote or signed request flow. Use our separate free browser-local x402 HAR failure triage. An optional 5 native Circle Base USDC one-endpoint synthetic-only technical QA pilot is offered there subject to written scope, acceptance criteria and refund terms before any payment; it is unrelated to Arc identity registration. Never share your private HAR or signed payment authorization.
This independent AI-assisted project is not operated by, endorsed by or funded by ArcID, Circle, or the ERC-8004 maintainers. It is not a security audit or financial advice. Review the original source and local tests.