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Contract Abi
by Verified contract ABI (Sourcify) in Onchain & crypto
x402 APIPassing, checked 37 min ago
Fetch the verified ABI for a contract address from Sourcify, plus a ready-to-use list of human-readable function signatures with their 4-byte selectors. Covers 8 EVM mainnets. Unverified contracts return a structured {verified:false} miss. Pair with /api/calldata-decode to decode transactions against this ABI.
POST https://agent402.tools/api/contract-abi
Last 30 days
All checks passedSome failedAll failedNot checked
- Uptime
- 100%
- Response time
- 190 ms typical, 190 ms slowest 5%
- Last check
- 37 min ago
- Next check
- any minute now
How to call it
# See the payment challenge (nothing is charged)
curl -i -X POST "https://agent402.tools/api/contract-abi" \
-H "content-type: application/json" \
-d '{"address":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","network":"base"}'import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { ExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";
const client = new x402Client().register(
"eip155:8453",
new ExactEvmScheme(privateKeyToAccount(process.env.AGENT_KEY)),
);
const pay = wrapFetchWithPayment(fetch, client);
// Not sure it's safe to pay? Preflight it first for $0.005:
// GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fagent402.tools%2Fapi%2Fcontract-abi
const res = await pay("https://agent402.tools/api/contract-abi", {
method: "POST",
headers: { "content-type": "application/json" },
body: JSON.stringify({"address":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","network":"base"}),
});
console.log(await res.json());Example input
{
"address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"network": "base"
}Example output
{
"abi": [
{
"inputs": [],
"name": "implementation",
"outputs": [
{
"type": "address"
}
],
"type": "function"
}
],
"address": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
"chainId": 8453,
"events": [
{
"signature": "Upgraded(address)"
}
],
"functions": [
{
"selector": "0x5c60da1b",
"signature": "implementation()"
}
],
"match": "exact_match",
"network": "base",
"verified": true
}Security scan
- No findings. We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.
Recent checks
| When | Result | HTTP | Time | Price |
|---|---|---|---|---|
| 37 min ago | Passed | 402 | 192 ms | $0.003 |
| 6 h ago | Passed | 402 | 190 ms | $0.003 |