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CoinMarketCap Cryptocurrency Listings via SiteCheck
x402
CoinMarketCap Cryptocurrency Listings via SiteCheck 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 a ranked list of top cryptocurrencies with live price, market cap, 24h volume, and percent change from CoinMarketCap
Price / call$0.002
Success—
StatusUnknown
How this service works
CoinMarketCap ranked crypto listing: name, symbol, USD price, market cap, 24h volume and 24h change for the top N coins. Read from the JSON that coinmarketcap.com itself loads (undocumented; can change without notice).
Output
Returns a JSON object with an array of coins (up to the requested limit), each containing name, slug, symbol, priceUsd, marketCapUsd, volume24hUsd, and changePercent24h, plus a count, the source URL (CoinMarketCap API), and a checkedAt timestamp indicating when the data was retrieved.
Example use cases
Live crypto portfolio valuation
“Get me the current prices and market caps for the top 50 coins from CoinMarketCap so I can calculate my portfolio value.”
Daily market cap leaderboard
“Show me the top 20 cryptocurrencies ranked by market cap right now, including their 24-hour percent change — I want to see who's up and who's down today.”
High-volume coin scanner
“Fetch the top 100 crypto coins from CoinMarketCap with their 24-hour trading volume so I can identify which ones are seeing the most activity.”
Technical details
Endpoint
GEThttps://api.chainmarket-api.workers.dev/api/finance/coinmarketcap?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need live CoinMarketCap-sourced cryptocurrency rankings without signing up for a CoinMarketCap API key; it's ideal for AI agents that need pay-per-call, no-credential access to top-coin price/market-cap data at low cost ($0.002 USDC per call) with x402 micropayment support across multiple chains.
Side effects
- Invalid limit parameter (outside 1–100 range) may return an error or default behavior
- Payment failure via x402 results in no charge and no data returned
- CoinMarketCap upstream outage may cause stale or unavailable data
- Omitting required 'input' field returns a schema validation error
- Network timeout on the Cloudflare Worker may return a 5xx error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"coins": [
{
"name": "CoinMarketCap 20 Index DTF",
"slug": "coinmarketcap-20-index",
"symbol": "CMC20",
"priceUsd": 165.7414026935861,
"marketCapUsd": 5652557.781488481,
"volume24hUsd": 1018686.05977253,
"changePercent24h": -0.09881069
},
{
"name": "Bitcoin",
"slug": "bitcoin",
"symbol": "BTC",
"priceUsd": 81524.67700056388,
"marketCapUsd": 1638833759042.466,
"volume24hUsd": 26209435036.17414,
"changePercent24h": -0.20883282
}
],
"count": 5,
"source": "https://api.coinmarketcap.com/data-api/v3/cryptocurrency/listing",
"checkedAt": "2026-10-23T09:36:17.159Z"
}
}Tags
x402
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