ToolVet
78trust / 100

Price

by offercheck in Onchain & crypto

x402 APIPassing, checked 2 h ago

Current prices for cryptocurrencies and tokens by symbol (btc, eth, sol, usdc, ...), CoinGecko slug, or on-chain token address on Base, Ethereum, Arbitrum, Solana and 100+ chains, using DeFiLlama's aggregated DEX/CEX pricing with a per-asset confidence score. Quote in USD or any ECB fiat currency. Up to 25 assets per call. $0.002 per call.

GET
https://offercheck.offercheck.workers.dev/v1/price
Price
$0.002
per call in USDC
Uptime
100%
last 30 days
Response time
337 ms
462 ms slowest 5%
Last check
Passed
2 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

How to call it

GET https://offercheck.offercheck.workers.dev/v1/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.

GET https://offercheck.offercheck.workers.dev/v1/price?ids=btc%2Ceth%2Cbase%3A0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913&vs=USD

Parameters

ParameterTypeRequiredDescription
idsstringNoComma-separated assets: symbols (btc, eth, sol, usdc, usdt, bnb, xrp, ada, doge, avax, link, ...), coingecko:<slug>, or <chain>:<token address> (e.g. base:0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913). Default btc,eth. Max 25. Default: "btc,eth".
vsstringNoQuote currency: USD (default) or any ECB fiat code (EUR, GBP, JPY, ...) Default: "USD".

Example response

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

Example response, 26 lines
{
  "fetched_at": "2026-09-25T20:53:41.000Z",
  "ms": 180,
  "prices": {
    "base:0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913": {
      "confidence": 0.99,
      "decimals": 6,
      "id": "base:0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "price": 0.9999,
      "price_usd": 0.9999,
      "priced_at": "2026-09-25T20:53:20.000Z",
      "symbol": "USDC"
    },
    "btc": {
      "confidence": 0.99,
      "id": "coingecko:bitcoin",
      "price": 83819.24,
      "price_usd": 83819.24,
      "priced_at": "2026-09-25T20:53:20.000Z",
      "symbol": "BTC"
    }
  },
  "source": "DeFiLlama coins API (aggregated on-chain DEX + CEX pricing with a per-asset confidence score)",
  "vs": "USD",
  "warnings": []
}

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 'https://offercheck.offercheck.workers.dev/v1/price?ids=btc%2Ceth%2Cbase%3A0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913&vs=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 - 'https://offercheck.offercheck.workers.dev/v1/price?ids=btc%2Ceth%2Cbase%3A0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913&vs=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%2Foffercheck.offercheck.workers.dev%2Fv1%2Fprice
const res = await pay("https://offercheck.offercheck.workers.dev/v1/price?ids=btc%2Ceth%2Cbase%3A0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913&vs=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.get("https://offercheck.offercheck.workers.dev/v1/price?ids=btc%2Ceth%2Cbase%3A0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913&vs=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
2 h agoPassed402300 ms$0.002
7 h agoPassed402134 ms$0.002
11 h agoPassed402439 ms$0.002
15 h agoPassed402387 ms$0.002
19 h agoPassed402409 ms$0.002
Show 10 older checks
23 h agoPassed402142 ms$0.002
27 h agoPassed402462 ms$0.002
31 h agoPassed402337 ms$0.002
35 h agoPassed402571 ms$0.002
39 h agoPassed402359 ms$0.002
42 h agoPassed402388 ms$0.002
46 h agoPassed402304 ms$0.002
2 days agoPassed402180 ms$0.002
2 days agoPassed402272 ms$0.002
2 days agoPassed402312 ms$0.002