Cross Exchange Funding
GET/v1/cryptodata/derivatives/funding-rates
Funding rates for ONE coin across Binance + Hyperliquid. Per-coin by design (`?coin=`, default BTC). The public /funding-rates board lists every Hyperliquid perp; for that universe over REST use `GET /api/v1/hyperliquid/open-interest` (`assets[].funding_rate`). `hyperliquid.history_count` is the number of recent HL settlements fetched alongside the live rate. Read it with `history_status`: `ok` (history present), `warming` (the fetch is still running — retry in a few seconds; the live `current_rate` is unaffected), `unavailable` (HL returned nothing, or the coin is not an HL perp). `0` with `warming` is not a stuck feed.
Price
$0.01/ callEdge cache
Off
Uptime 24h
100.00%
p95
684ms
MCP tool
cryptodata_derivatives-funding-rates
Parameters
| Name | In | Type | Description |
|---|---|---|---|
| coin | query | string = BTC | One coin per call, e.g. BTC, ETH, SOL |
Code
# 1. No key, no payment: the gateway answers 402 with the price
curl -i "https://api.realtimeapi.ai/v1/cryptodata/derivatives/funding-rates"
# 2. Pay: retry with a signed x402 payment (any x402 client builds this header)
curl "https://api.realtimeapi.ai/v1/cryptodata/derivatives/funding-rates" -H "PAYMENT-SIGNATURE: $X402_PAYMENT"// npm i @x402/fetch @x402/core @x402/evm viem
import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { ExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";
const client = x402Client.fromConfig({ schemes: [{ network: "eip155:8453", client: new ExactEvmScheme(privateKeyToAccount(PRIVATE_KEY)) }] });
const pay = wrapFetchWithPayment(fetch, client);
const data = await (await pay("https://api.realtimeapi.ai/v1/cryptodata/derivatives/funding-rates")).json();
console.log(data);# pip install x402 eth-account requests
from eth_account import Account
from x402.clients.requests import x402_requests
session = x402_requests(Account.from_key(PRIVATE_KEY))
print(session.get("https://api.realtimeapi.ai/v1/cryptodata/derivatives/funding-rates").json())curl "https://api.realtimeapi.ai/v1/cryptodata/derivatives/funding-rates" -H "X-API-Key: $RTAPI_KEY"Frequently asked questions
How do I get cross exchange funding from CryptoDataAPI?
Send GET https://api.realtimeapi.ai/v1/cryptodata/derivatives/funding-rates. Pay $0.01 per request with x402, or send an X-API-Key header.
What does GET /derivatives/funding-rates cost?
$0.01 per successful request in USDC on Base. Failed requests are never charged.
Can I call this endpoint from an MCP client?
Yes. Connect any MCP client to the RealtimeAPI server and use call_feed with this endpoint's URL, or get_quote to check the price first.