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nbx4 Token & Proxy Report
x402
nbx4 Token & Proxy Report is a paid API for AI agents from nbx4.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-11-02).
Returns block-evidenced metadata about a Base (chain 8453) contract address, including proxy structure, ownership, token info, best-effort source match, and snapshot comparison, with a verdict label and SVG card.
Price / call$0.01
Success—
StatusUnknown
How this service works
Analyze a Base Mainnet token contract: block-pinned owner(), ERC-1967 proxy slots, ERC-20 metadata, code hash, best-effort source match and prior-snapshot comparison when available. Free POST /v1/prepare returns report_id; paid GET /v1/report reads it for 0.01 USDC via x402. Not a security audit.
Output
Returns a structured JSON object containing: a verdict_label summarizing the risk/status assessment; the contract address on Base (chain_id 8453); block-evidenced control fields (owner, admin, beacon, pending_owner, implementation) each with observed/not_observed/unknown status and supporting evidence; a code_hash observation; token metadata; best-effort source match result; an observed snapshot comparison; a report_digest for integrity; and a rendered SVG card summarizing the report visually.
Example use cases
Audit a new DeFi token before investing
“I'm about to ape into this Base token — can you pull its nbx4 report using report ID 'tok_8f2a91' and tell me who the owner is, whether it's a proxy contract, and what the verdict label says?”
Verify contract control before listing
“We're listing a new token and need to verify its control structure on Base — fetch the nbx4 report for report ID 'rep_00445b' and let me know the admin, implementation, and any pending owner observations.”
Cross-check snapshot for a known contract
“Has anything changed in the on-chain snapshot for this contract? Pull the nbx4 report with report ID 'snap_c77d02' and compare it to the observed state — I especially care about the code hash and owner fields.”
Technical details
Endpoint
GEThttps://nbx4.dev/v1/report?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need block-evidenced, structured analysis of a specific Base chain contract, particularly when you have a pre-generated report_id and need ownership, proxy, token metadata, and source match details in a single call. Prefer this over generic blockchain explorers when you need a machine-readable verdict label and SVG summary card for agent workflows or automated audits.
Side effects
- Invalid or unknown report_id returns an error or empty result
- Report data may be stale if the underlying snapshot has not been refreshed recently
- Proxy slot observations may show 'unknown' if the contract does not expose standard slot patterns
- Source match is best-effort and may not resolve for non-verified or obfuscated contracts
- Chain is hardcoded to Base (chain_id 8453); reports for other chains are not supported
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"chain_id": 8453,
"report_id": "nbx4_ad470a5aab2b590648729ab90f295ba76e0390ab2eddad01e360776a64000312"
}
}Tags
x402
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