Read-only crypto market data · Pay for one JSON result · No login for the free example

BTC/USDT perpetual funding rates from four exchanges

Compare quoted perpetual futures funding rates in a structured response without opening any position. The paid endpoint requires four distinct, fresh, successfully observed public exchange responses before requesting payment. Preferred public sources are Binance, Bybit, OKX and Bitget, with regional fallbacks to MEXC and Gate.io when needed. Actual included venues depend on availability and regional accessibility.

Live paid GET · x402 v2 · Base mainnet USDC

0.010000 USDC per authorised JSON GET

Each reported observation is source-labelled and contains a funding quote and its exchange-specific timing information. Quote timing is not normalized into an imaginary identical 8-hour interval. The endpoint refuses an incomplete, stale or invalid upstream sample with an error before charging.

PayAPI official listing + verified test receipt ↗ Free fictional JSON example ↗

The free example is purposefully synthetic: exampleOnly:true, paid:false, noRealMarketQuoteInThisSample:true. Do not use its placeholder values in a trade.

Inspect the unsigned price before any purchase

A read-only HTTP request to the live resource with no payment returns HTTP 402 Payment Required and a PAYMENT-REQUIRED header. Inspect the terms manually. No wallet signature, account creation or token transfer is needed to view the price.

curl -i 'https://vm5-openapi-x402.onrender.com/v1/btc-funding-four-venues'
# HTTP 402, x402Version: 2, scheme: exact, network: eip155:8453
# amount: 10000 atomic units = 0.010000 native Circle USDC
# asset: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
# payTo: 0x4e3106520E40af30870caFE78da1B1e7110eD98E

Buyer payment rail: Base mainnet, eip155:8453. This is a payment for market-data access, not leveraged trading or a bridge.
USDC token contract: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 (native Circle USDC on Base, 6 decimals).
Exact quote amount: 10000 atomic USDC = 0.010000 USDC. Confirm live terms before signing. A buyer-controlled x402 client pays only when its human/operator approves.
Original economic owner's payee: 0x4e3106520E40af30870caFE78da1B1e7110eD98E (the original VM1 MetaMask on Base). The API is operated by a separate VM under the same one beneficial human owner.
Protocol: x402Version: 2, exact EVM payment, GET. No credentials or wallet keys are requested from visitors by this page.
Developer input: No required POST body, API key, or token symbol input. The public endpoint itself fixes the BTC/USDT market and its source count.

What the response tells you and what it does not

Funding rates are periodic transfers between long and short perpetual positions. Venues may use different funding intervals, funding caps, marks and timestamps. A reported rate is not APY, savings interest, guaranteed return, an investment recommendation, an instruction to trade or proof that a proposed basis trade is profitable. Compare the source interval and mark information, not merely the sign of the rate.

The provider attempts four independent public venues and does not charge for a partial snapshot. Data can still be delayed between the upstream quote, this service, your own analysis and a trade. Verify directly with the exchange before any position. Do not provide trading authority or private wallet credentials to this market-data endpoint.

Free offline funding-interval checker (no wallet)

For a separate demonstration of how not to confuse per-interval funding percentages with profit, use the free Python 3 source and 20 regression tests. Its entire four-venue input is synthetic, with explicit UTC observation and next-settlement times. It prints per-period basis points and a mechanically extrapolated 24-hour figure only as arithmetic, not APY or expected earnings. It never calls a live exchange, the paid API, or a wallet. Official period metadata should always be checked separately using Binance, Bybit, OKX, and Bitget documentation.

Walkthrough: Four BTC/USDT funding quotes, four clocks — free offline normalization tutorial on DEV Community ↗. The article uses four fabricated rates, reproduces 20 offline Python tests, and openly discloses this separate paid API business. It does not estimate current exchange rates, APR or profitability.

One real paid test, no fictional sales

On 24 October 2026 at 06:54:33 UTC, PayAPI Market verified one operator-funded paid GET. Its public record marks this route payment_verified: true at 06:56:07 UTC, with one native Base Circle USDC transfer of 0.010000 USDC to the original owner's receiving address.

Check the original Base transfer ↗ · ERC20 transfer logIndex: 90 · PayAPI verified listing ↗.

Disclosure: this is one marketplace-operated verification purchase, not an independently documented organic paying customer, recurring subscription, a guarantee of future demand, or a third-party audit of market-data accuracy. Net profit after labor, infrastructure and tax is not established. No new money is charged or collected by browsing this static site.

If you need a signed-scope review of a separate x402 invoice or browser CORS problem, review the optional service terms. No services or customer contract are automatically created by viewing this page.

원래 VM1 MetaMask로 지급되는 Base USDC 0.01/호출 데이터 API입니다. 무료 예시의 숫자는 가상 값이며 투자 조언이 아닙니다. 2026년 10월 24일 판매 플랫폼의 유료 시험 1건만 확인되었습니다.