Crypto Perps

{
  "count": 3,
  "exchange": "Hyperliquid",
  "markets": [
    {
      "change_24h_pct": -0.37,
      "coin": "BTC",
      "funding_apr_pct": 10.95,
      "funding_rate_1h": 0.0000125,
      "mark_price": 82501,
      "max_leverage": 40,
      "open_interest_usd": 3259110835,
      "oracle_price": 82530,
      "premium": -0.0003392706,
      "volume_24h_usd": 2926701809
    },
    {
      "change_24h_pct": -0.5,
      "coin": "ETH",
      "funding_apr_pct": 10.95,
      "funding_rate_1h": 0.0000125,
      "mark_price": 2430.9,
      "max_leverage": 25,
      "open_interest_usd": 2684156218,
      "oracle_price": 2431.9,
      "premium": -0.0004112011,
      "volume_24h_usd": 921114016
    }
  ],
  "note": "funding_rate_1h is paid hourly by longs to shorts when positive",
  "sort": "open_interest"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://bess-x402.onrender.com/v1/crypto/perps?coins=BTC%2CETH%2CSOL'

# 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://bess-x402.onrender.com/v1/crypto/perps?coins=BTC%2CETH%2CSOL' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode

// 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 $0.003 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.003" });
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 $0.003 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fbess-x402.onrender.com%2Fv1%2Fcrypto%2Fperps
const res = await pay("https://bess-x402.onrender.com/v1/crypto/perps?coins=BTC%2CETH%2CSOL");
console.log(res.status, await res.text());

# 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 $0.003 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.003"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://bess-x402.onrender.com/v1/crypto/perps?coins=BTC%2CETH%2CSOL")
    print(res.status_code, res.text)