Skill: Contract audit

Bundled execution of the Contract audit workflow — Triage a smart contract before an agent interacts with it: verified source, heuristic vulnerability scan, known-address check, function-selector resolution, and a read-only dry-run of the exact call you plan to make. One x402 payment runs 5 underlying tools (contract-source, solidity-scan, selector-lookup, address-label, tx-simulate); partial-success per step.

Input

Example output

{
  "pack": "contract-audit",
  "args": {
    "address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "network": "base",
    "data": "0x70a08231000000000000000000000000abf4fabd7c416fb67202e5f9002389fc75e2a9d0"
  },
  "steps": [
    {
      "slug": "contract-source",
      "ok": true,
      "result": {}
    },
    {
      "slug": "solidity-scan",
      "ok": true,
      "result": {}
    },
    {
      "slug": "selector-lookup",
      "ok": true,
      "result": {}
    },
    {
      "slug": "address-label",
      "ok": true,
      "result": {}
    },
    {
      "slug": "tx-simulate",
      "ok": true,
      "result": {}
    }
  ],
  "summary": "5/5 steps succeeded"
}

Try it — see the 402 challenge (free)

curl -i -X POST https://agent402.tools/api/skill/contract-audit \
  -H "Content-Type: application/json" \
  -d '{"address":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","network":"base","data":"0x70a08231000000000000000000000000abf4fabd7c416fb67202e5f9002389fc75e2a9d0"}'

The response is HTTP 402 Payment Required with exact payment requirements. Any x402 v2 client pays automatically and retries:

Paid call (JavaScript agent)

import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client();
registerExactEvmScheme(client, { signer: privateKeyToAccount(KEY) });
const payFetch = wrapFetchWithPayment(fetch, client);

const res = await payFetch("https://agent402.tools/api/skill/contract-audit", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
    "address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "network": "base",
    "data": "0x70a08231000000000000000000000000abf4fabd7c416fb67202e5f9002389fc75e2a9d0"
  }),
});

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