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x402 Crypto Top Markets by Market Cap
x402
x402 Crypto Top Markets by Market Cap is a paid API for AI agents from x402-data-api.sigrunner.workers.dev, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-29).
Returns a ranked list of top cryptocurrencies by market cap, including price, market cap, 24h volume, and 24h percent change, with optional limit up to 100.
Price / call$0.003
Success—
StatusUnknown
How this service works
Top coins by market cap (CoinGecko): price, market cap, 24h volume, 24h change; ?limit= up to 100. No required params. Use when an agent needs a ranked market snapshot.
Output
Returns a JSON array of coin objects ranked by market cap, each containing the coin symbol, current price in USD, 24-hour percent price change, and optionally market cap and 24h volume. The number of results is controlled by the optional `limit` parameter (default behavior returns top coins, up to 100).
Example use cases
Morning crypto market briefing
“Pull up the top 20 crypto coins by market cap and show me their current prices and 24-hour changes so I can see how the market opened today.”
Portfolio benchmarking against top assets
“Get me the current market cap and price for the top 50 cryptocurrencies — I want to benchmark my holdings against the biggest coins in the market.”
Crypto market cap ranking for a report
“Fetch a ranked list of the top 100 cryptocurrencies by market cap with their prices, volumes, and 24h percent changes — I'm putting together a weekly market summary.”
Technical details
Endpoint
GEThttps://x402-data-api.sigrunner.workers.dev/crypto/markets-top?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a ranked, multi-coin market snapshot sorted by market cap — ideal for portfolio benchmarking, market overviews, or any scenario requiring a broad view of the leading crypto assets. Prefer this over trending or gainers/losers endpoints when market-cap ranking is the primary sorting criterion rather than momentum or recent price action.
Side effects
- Invalid or out-of-range `limit` value (e.g. above 100) may return an error or be clamped
- CoinGecko upstream downtime or rate limiting may cause failures or stale data
- Payment failure via x402 protocol will block the request ($0.003 USDC required per call)
- Network timeout from Cloudflare Workers if CoinGecko response is slow
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"coins": [
{
"symbol": "BTC",
"price_usd": 82028,
"change_24h_pct": 1.07
}
]
}
}Tags
x402
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