ToolVet
68trust / 100

Class Data Onchain Query

by coord.taifoon.dev in Onchain & crypto

x402 APIPassing, checked 1 h ago

On-chain data query on Base, sold by Taifoon: the tokens and fee tier of a Uniswap V3 pool, or the hash of a block. An admitted data seller answers; Taifoon reads the same facts from the chain and grades the answer before you are charged. A failed answer is not charged. Answer + graded receipt. 0.03 USDC a call.

POST
https://coord.taifoon.dev/v1/x402/class/data.onchain_query
Price
$0.03
per call in USDC
Uptime
100%
last 30 days
Response time
2.7 s
5.0 s slowest 5%
Last check
Passed
1 h ago, next any minute now

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

POST https://coord.taifoon.dev/v1/x402/class/data.onchain_query

Each call costs $0.03 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://coord.taifoon.dev/v1/x402/class/data.onchain_query
content-type: application/json

{
  "input": {
    "chainId": 8453,
    "pool": "0xd0b53D9277642d899DF5C87A3966A349A798F224",
    "question": "pool_tokens"
  }
}

Example response

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

Example response, 38 lines
{
  "answer": {
    "fee": 500,
    "token0": "0x… (WETH)",
    "token1": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913"
  },
  "chain_id": 8453,
  "class": "data.onchain_query",
  "grade": {
    "checks": {
      "answer_exact": true,
      "data_present": true,
      "fee_exact": true,
      "no_error": true
    },
    "ok": true,
    "read": {
      "source": "eth_call token0()/token1()/fee() over the Base rotation"
    }
  },
  "ok": true,
  "question": "pool_tokens",
  "receipt": {
    "cache": {
      "hit": false
    },
    "digest": "0x…",
    "seller": "graphadvocate.com"
  },
  "sale": {
    "id": "rs_…",
    "margin_units": "20000",
    "payment_tx": "0x…",
    "price_units": "30000",
    "seller_units": "10000"
  },
  "subject": "0xd0b53d9277642d899df5c87a3966a349a798f224"
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.03.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://coord.taifoon.dev/v1/x402/class/data.onchain_query' \
  -H 'content-type: application/json' \
  --data-raw '{"input":{"chainId":8453,"pool":"0xd0b53D9277642d899DF5C87A3966A349A798F224","question":"pool_tokens"}}'

# 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://coord.taifoon.dev/v1/x402/class/data.onchain_query' \
  -H 'content-type: application/json' \
  --data-raw '{"input":{"chainId":8453,"pool":"0xd0b53D9277642d899DF5C87A3966A349A798F224","question":"pool_tokens"}}' \
  | 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 $0.03 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.03" });
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 $0.03 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fcoord.taifoon.dev%2Fv1%2Fx402%2Fclass%2Fdata.onchain_query&method=POST
const res = await pay("https://coord.taifoon.dev/v1/x402/class/data.onchain_query", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "input": {
      "chainId": 8453,
      "pool": "0xd0b53D9277642d899DF5C87A3966A349A798F224",
      "question": "pool_tokens"
    }
  }),
});
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 $0.03 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.03"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://coord.taifoon.dev/v1/x402/class/data.onchain_query",
        json={
            "input": {
                "chainId": 8453,
                "pool": "0xd0b53D9277642d899DF5C87A3966A349A798F224",
                "question": "pool_tokens",
            },
        },
    )
    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
1 h agoPassed4022.2 s$0.03
7 h agoPassed4021.3 s$0.03
12 h agoPassed402350 ms$0.03
17 h agoPassed402494 ms$0.03
22 h agoPassed4022.3 s$0.03
Show 10 older checks
27 h agoPassed4023.4 s$0.03
31 h agoPassed4022.9 s$0.03
36 h agoPassed402341 ms$0.03
41 h agoPassed4024.6 s$0.03
45 h agoPassed4022.7 s$0.03
2 days agoPassed4023.1 s$0.03
2 days agoPassed4021.5 s$0.03
2 days agoPassed4023.3 s$0.03
3 days agoPassed4024.4 s$0.03
3 days agoPassed4025.0 s$0.03