# coinpay

Canonical page: https://coinpay.hk/en

coinpay is an independent reference for USDT P2P exchange rates and premiums in 29 fiat markets. Every 30 minutes coinpay reads the first public USDT ads on Binance P2P and OKX P2P for each market, takes the median price for buying and for selling, and compares it with a USD reference rate (XE or Frankfurter, named on each market page). KRW uses the Bithumb spot price. Premium = (median price ÷ reference − 1) × 100.

Every 30-minute sample since August 2026 is archived permanently. Browse daily history for each market or download CSV and JSON files under CC BY 4.0.

## Markets
- [All USDT P2P markets](https://coinpay.hk/markets.md): latest 30-minute snapshot of every market in one table.
- Market guides, one per fiat at /p2p/{fiat}.md: [USDT/VES · Venezuela](https://coinpay.hk/p2p/ves.md), [USDT/ARS · Argentina](https://coinpay.hk/p2p/ars.md), [USDT/NGN · Nigeria](https://coinpay.hk/p2p/ngn.md), [USDT/IDR · Indonesia](https://coinpay.hk/p2p/idr.md); markets.md links all of them.

## Tools
- [P2P tools](https://coinpay.hk/tools.md): P2P arbitrage scanner, crypto arbitrage calculator and the Binance P2P rates index.

## Data
- [Open data](https://coinpay.hk/data.md): free CSV and JSON downloads (CC BY 4.0), endpoints, columns and the OpenAPI description.

## Methodology
- [Methodology](https://coinpay.hk/methodology.md): sampling, median price, premium formula, FX references, outliers and caveats.

## About
- [About coinpay](https://coinpay.hk/about.md): purpose, independence, languages and license.

## Languages
The website is available in six languages: [Chinese (Simplified)](https://coinpay.hk/zh-cn), [English](https://coinpay.hk/en), [Korean](https://coinpay.hk/ko), [Vietnamese](https://coinpay.hk/vi), [Arabic](https://coinpay.hk/ar) and [Spanish](https://coinpay.hk/es). Every page path starts with its language prefix: /zh-cn, /en, /ko, /vi, /ar, /es (for example /es/p2p/ves). These Markdown guides are in English.

## Agent access
The HTML pages, these guides and the open data files are public: no API key, no sign-up. The data files (CSV, JSON, OpenAPI) are free under CC BY 4.0; please credit coinpay.hk and cache responses for at least a few minutes. Quotes are reference data taken from public ads, not offers to trade, and nothing here is financial advice. coinpay only reads public ads and prices: there is no MCP server and no trading or order API.