ToolVet
77trust / 100

Chain Proxy

by Tanod chainpeek in Onchain & crypto

x402 APIPassing, checked 4 h ago

chainpeek (Tanod) proxy detection: proxy kind, implementation, admin and beacon of a contract on Ethereum or Base. Read-only.

POST https://tanod.dev/v1/chain/proxy

Last 30 days

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Status and outage history · Atom feed

Uptime
100%
Response time
307 ms typical, 839 ms slowest 5%
Last check
4 h ago
Next check
any minute now

How to call it

POST https://tanod.dev/v1/chain/proxy

Each call costs $0.002 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.

POST https://tanod.dev/v1/chain/proxy
content-type: application/json

{
  "address": "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48",
  "chain": "ethereum"
}

Parameters

ParameterTypeRequiredDescription
addressstringYesContract address (0x + 40 hex).
chainstringYesChain to read. One of: ethereum, base.

Example response

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

{
  "address": "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48",
  "admin": "0x807a96288A1A408dBC13DE2b1d087d10356395d2",
  "beacon": null,
  "chain": "ethereum",
  "code_bytes": 2186,
  "implementation": "0x43506849D7C04F9138D1A2050bbF3A0c054402dd",
  "implementation_has_code": true,
  "is_contract": true,
  "is_proxy": true,
  "kind": "oz_legacy",
  "patterns": [
    "oz_legacy"
  ],
  "rpc_calls": 10,
  "slots": {
    "oz_legacy_admin": "0x807a96288A1A408dBC13DE2b1d087d10356395d2",
    "oz_legacy_implementation": "0x43506849D7C04F9138D1A2050bbF3A0c054402dd"
  }
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.002.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://tanod.dev/v1/chain/proxy' \
  -H 'content-type: application/json' \
  --data-raw '{"address":"0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48","chain":"ethereum"}'

# 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 - -X POST 'https://tanod.dev/v1/chain/proxy' \
  -H 'content-type: application/json' \
  --data-raw '{"address":"0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48","chain":"ethereum"}' \
  | 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 $0.002 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.002" });
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 $0.002 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Ftanod.dev%2Fv1%2Fchain%2Fproxy&method=POST
const res = await pay("https://tanod.dev/v1/chain/proxy", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "address": "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48",
    "chain": "ethereum"
  }),
});
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 $0.002 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.002"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://tanod.dev/v1/chain/proxy",
        json={
            "address": "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48",
            "chain": "ethereum",
        },
    )
    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
4 h agoPassed402307 ms$0.002
8 h agoPassed402262 ms$0.002
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2 days agoPassed402362 ms$0.002