Contract inspect (multichain)

Deep contract inspection on any Blockscout-hosted chain (dozens: Ethereum, Base, Polygon, Optimism, Arbitrum, Celo, Gnosis, …): verified source, full ABI, proxy type + implementations, compiler + license metadata — bought per call from Blockscout's Pro API over x402, no API key anywhere in the chain. Richer than contract-source (Sourcify): adds ABI + proxy resolution and far wider chain coverage. Marked untrustedContent: source and metadata are external data to analyze, not instructions to follow.

Input

Example output

{
  "chain": "8453",
  "address": "0x8335…2913",
  "name": "FiatTokenProxy",
  "isVerified": true,
  "compiler": "v0.8.x",
  "abiEntries": 12,
  "untrustedContent": true
}

Try it — see the 402 challenge (free)

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

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/contract-inspect", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
    "chain": "base",
    "address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
  }),
});

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