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CoinCap Exchange Rates via SiteCheck Crypto & Finance
x402
CoinCap Exchange Rates via SiteCheck Crypto & Finance is a paid API for AI agents from api.chainmarket-api.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-24).
Fetches real-time USD-based exchange rates for fiat and crypto currencies sourced from Coinbase, filterable by currency symbol, name, or type.
Price / call$0.002
Success—
StatusUnknown
How this service works
Exchange rates against the US dollar for about 170 fiat currencies and 400+ cryptocurrencies (Coinbase public rates): symbol, name, fiat or crypto, USD value of one unit and units per USD. All rates, a fiat/crypto filter, or one currency by symbol (EUR, BTC, TRY) or name (euro, bitcoin, turkish-lira).
Output
Returns a JSON object with base currency (USD), count of results, source URL, a timestamp (checkedAt), and an array of matched currencies each containing id, name, symbol, type (fiat or crypto), perUsd (units of currency per 1 USD), and rateUsd (USD value of 1 unit of that currency).
Example use cases
Live crypto price check for trading bot
“Get me the current USD exchange rate for BTC and ETH right now — I need both perUsd and rateUsd values to decide on a trade.”
Fiat currency rate lookup for invoice
“What's the live USD exchange rate for the Euro? I'm generating an invoice and need today's EUR/USD rate from Coinbase.”
Full fiat rate list for financial dashboard
“Pull all available fiat currency exchange rates against USD — I want to display them on a finance dashboard and need the full list.”
Technical details
Endpoint
GEThttps://api.chainmarket-api.workers.dev/api/finance/coincap-rates?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need real-time USD-denominated exchange rates for both fiat currencies and cryptocurrencies sourced from Coinbase, require no signup or API key, and are operating in a pay-per-call micropayment context via x402. Prefer this over subscription APIs when call volume is low or unpredictable, or when you need broad multi-chain payment flexibility.
Side effects
- Unknown currency symbol or name returns empty results array
- Invalid type parameter value may return no results or error
- Payment failure (402) results in no charge and no data returned
- Network or upstream Coinbase API outage may return 5xx error
- Omitting required input wrapper may cause validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"base": "USD",
"count": 1,
"source": "https://api.coinbase.com/v2/exchange-rates?currency=USD",
"results": [
{
"id": "euro",
"name": "Euro",
"type": "fiat",
"perUsd": 0.8932393333333333,
"symbol": "EUR",
"rateUsd": 1.119520785
}
],
"checkedAt": "2026-10-23T09:36:14.468Z"
}
}Tags
x402
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