ToolVet
80trust / 100

Crypto Funding

by SiteCheck in Onchain & crypto

x402 APIPassing, checked 52 min ago

Perpetual futures funding for one coin across Hyperliquid, OKX, Deribit and dYdX v4: the current funding rate, the interval (1 or 8 hours), the annualised rate, the next funding time, open interest in coins and USD, and the mark or oracle price. A venue that does not list the coin is left out and named in unavailable. Rates are as the venues publish them; funding is paid between traders, not to the venue. Information only, not financial advice.

GET
https://api.sitecheck-api.workers.dev/api/crypto/funding
Price
$0.002
per call in USDC
Uptime
100%
last 30 days
Response time
127 ms
127 ms slowest 5%
Last check
Passed
52 min 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

GET https://api.sitecheck-api.workers.dev/api/crypto/funding

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://api.sitecheck-api.workers.dev/api/crypto/funding?coin=BTC

Parameters

ParameterTypeRequiredDescription
coinstringYesCoin ticker, 2 to 10 letters or digits, e.g. BTC, ETH or SOL

Example response

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

Example response, 43 lines
{
  "checkedAt": "2026-10-15T13:40:00.658Z",
  "coin": "BTC",
  "count": 4,
  "disclaimer": "Information only, not financial advice.",
  "source": "Hyperliquid info API, OKX public API, Deribit public API, dYdX v4 indexer (funding, open interest, mark or oracle price)",
  "unavailable": [],
  "venues": [
    {
      "annualisedRate": -0.0030230760000000004,
      "fundingIntervalHours": 1,
      "fundingRate": -3.451e-7,
      "markPrice": 80595,
      "nextFundingTime": "2026-10-15T14:00:00.000Z",
      "openInterestCoins": 40130.8762,
      "openInterestUsd": 3234347967.3389997,
      "symbol": "BTC-PERP",
      "venue": "Hyperliquid"
    },
    {
      "annualisedRate": 0.0389554517023335,
      "fundingIntervalHours": 8,
      "fundingRate": 0.0000355757549793,
      "markPrice": 80665.2,
      "nextFundingTime": "2026-10-16T00:00:00.000Z",
      "openInterestCoins": 30761.32130000009,
      "openInterestUsd": 2479076416.491917,
      "symbol": "BTC-USDT-SWAP",
      "venue": "OKX"
    },
    {
      "annualisedRate": 0.0328281,
      "fundingIntervalHours": 8,
      "fundingRate": 0.00002998,
      "markPrice": 80633.35,
      "nextFundingTime": "2026-10-15T16:00:00.000Z",
      "openInterestCoins": 10986.0432438935,
      "openInterestUsd": 885841470,
      "symbol": "BTC-PERPETUAL",
      "venue": "Deribit"
    }
  ]
}

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://api.sitecheck-api.workers.dev/api/crypto/funding?coin=BTC'

# 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.sitecheck-api.workers.dev/api/crypto/funding?coin=BTC' \
  | 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%2Fapi.sitecheck-api.workers.dev%2Fapi%2Fcrypto%2Ffunding
const res = await pay("https://api.sitecheck-api.workers.dev/api/crypto/funding?coin=BTC");
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://api.sitecheck-api.workers.dev/api/crypto/funding?coin=BTC")
    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
52 min agoPassed402127 ms$0.002
5 h agoPassed402127 ms$0.002
9 h agoPassed40270 ms$0.002