ToolVet
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Chain Price

by Tanod chainpeek in Onchain & crypto

x402 APIPassing, checked 1 h ago

chainpeek (Tanod) token price: the latest answer of a Chainlink on-chain price feed (not a DEX spot price) for a fixed pair list (ETH/USD, BTC/USD, USDC/USD, USDT/USD, DAI/USD, LINK/USD, cbETH/ETH on both chains; stETH/USD on Ethereum only; cbETH/USD on Base only), with round, update time and a staleness flag against the feed's heartbeat. Read-only.

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

Last 30 days

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Status and outage history · Atom feed

Uptime
100%
Response time
283 ms typical, 482 ms slowest 5%
Last check
1 h ago
Next check
any minute now

How to call it

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

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/price
content-type: application/json

{
  "chain": "base",
  "pair": "ETH/USD"
}

Parameters

ParameterTypeRequiredDescription
chainstringYesChain whose Chainlink feed to read. One of: ethereum, base.
pairstringYesPrice pair from the fixed Chainlink feed allow-list. stETH/USD is Ethereum-only; cbETH/USD is Base-only. One of: ETH/USD, BTC/USD, USDC/USD, USDT/USD, DAI/USD, LINK/USD, stETH/USD, cbETH/USD, cbETH/ETH.

Example response

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

{
  "age_seconds": 60,
  "chain": "base",
  "decimals": 8,
  "feed": "0x71041dddad3595F9CEd3DcCFBe3D1F4b0a16Bb70",
  "heartbeat_s": 1200,
  "pair": "ETH/USD",
  "price": "2609.9158",
  "round_id": "55340232221128661822",
  "stale": false,
  "updated_at": 1791363719
}

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/price' \
  -H 'content-type: application/json' \
  --data-raw '{"chain":"base","pair":"ETH/USD"}'

# 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/price' \
  -H 'content-type: application/json' \
  --data-raw '{"chain":"base","pair":"ETH/USD"}' \
  | 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%2Fprice&method=POST
const res = await pay("https://tanod.dev/v1/chain/price", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "chain": "base",
    "pair": "ETH/USD"
  }),
});
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/price",
        json={
            "chain": "base",
            "pair": "ETH/USD",
        },
    )
    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 agoPassed402482 ms$0.002
5 h agoPassed402345 ms$0.002
9 h agoPassed402356 ms$0.002
13 h agoPassed402326 ms$0.002
17 h agoPassed402283 ms$0.002
21 h agoPassed402401 ms$0.002
25 h agoPassed402266 ms$0.002
28 h agoPassed402278 ms$0.002
32 h agoPassed402427 ms$0.002
35 h agoPassed402349 ms$0.002
39 h agoPassed402269 ms$0.002
42 h agoPassed402269 ms$0.002
46 h agoPassed402284 ms$0.002
2 days agoPassed402271 ms$0.002
2 days agoPassed402272 ms$0.002