ToolVet
78trust / 100

Contract Source

by evm-contract-source in Onchain & crypto

x402 APIPassing, checked 7 min ago

Fetch a verified smart-contract's full source, ABI, compiler settings and NatSpec docs for an EVM address, and automatically resolve a proxy to its implementation so the response also carries the implementation ABI. One call returns everything an audit or integration agent needs to understand the contract, keyless and pay-per-call. Unverified contracts are reported honestly.

GET
https://api.agentstools.dev/contract/source
Price
$0.02
per call in USDC
Uptime
100%
last 30 days
Response time
114 ms
1.0 s slowest 5%
Last check
Passed
7 min ago, next in 22 min

Run a free test callHow to call it

Reliability

All checks passedSome failedAll failedNot checked

Status and outage history · Atom feed · Watch with other listings

How to call it

GET https://api.agentstools.dev/contract/source

Each call costs $0.02 in USDC on Base, paid with the request over x402.

Run a free test callOne unpaid request, the way an agent sends it. You see the payment challenge it gets back. Nothing is charged.

Example request

From the listing.

GET https://api.agentstools.dev/contract/source?address=0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913&network=base

Parameters

ParameterTypeRequiredDescription
addressstringYesContract address, 0x + 40 hex
networkstringNoEVM network (default base) One of: base, ethereum, arbitrum, optimism, polygon, bnb.

Example response

The provider's example. We can't check it without paying.

{
  "abi_len": 12,
  "attribution": "Verified source / ABI / NatSpec / proxy-resolution via Sourcify (https://sourcify.dev), a public decentralized verified-contract store.",
  "chain_id": 8453,
  "compilation": {
    "compiler_version": "0.6.12",
    "language": "Solidity",
    "name": "FiatTokenProxy"
  },
  "network": "base",
  "proxy": {
    "impl_abi_len": 72,
    "impl_address": "0x2Ce6311d...",
    "impl_name": "FiatTokenV2_2",
    "is_proxy": true,
    "proxy_type": "ZeppelinOSProxy"
  },
  "source_file_count": 1,
  "verified": true
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.02.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://api.agentstools.dev/contract/source?address=0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913&network=base'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - 'https://api.agentstools.dev/contract/source?address=0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913&network=base' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode
JavaScript: pay and call
// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.02 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.02" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.02 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.agentstools.dev%2Fcontract%2Fsource
const res = await pay("https://api.agentstools.dev/contract/source?address=0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913&network=base");
console.log(res.status, await res.text());
Python: pay and call
# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.02 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.02"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://api.agentstools.dev/contract/source?address=0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913&network=base")
    print(res.status_code, res.text)

Security scan

No findings

We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

Recent checks

WhenResultHTTPTimePrice
7 min agoPassed402116 ms$0.02
5 h agoPassed4021.0 s$0.02
10 h agoPassed402108 ms$0.02
14 h agoPassed402104 ms$0.02
19 h agoPassed402111 ms$0.02
Show 10 older checks
23 h agoPassed402112 ms$0.02
28 h agoPassed40281 ms$0.02
32 h agoPassed40281 ms$0.02
36 h agoPassed402156 ms$0.02
40 h agoPassed402164 ms$0.02
45 h agoPassed402138 ms$0.02
2 days agoPassed402144 ms$0.02
2 days agoPassed402114 ms$0.02
2 days agoPassed40291 ms$0.02
3 days agoPassed402142 ms$0.02