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Hermes Data API – Crypto Price Lookup
x402
Hermes Data API – Crypto Price Lookup is a paid API for AI agents from x402-api-blond.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-13).
Returns real-time cryptocurrency price, 24h change, and metadata for a given symbol, sourced from CoinGecko, paid per-call via x402/USDC.
Price / call$0.01
Success—
StatusUnknown
How this service works
Pay-per-call data API: crypto prices (CoinGecko), China A-share quotes (Sina), weather (Open-Meteo), forex rates, and Ethereum gas fees. Payments via x402 protocol, USDC on Base.
Output
Returns a JSON object with the Unix timestamp of the data, the data source (e.g. 'coingecko'), the requested symbol (e.g. 'BTC'), the current price in USD, and the 24-hour percentage price change.
Example use cases
Live portfolio valuation check
“Can you fetch the current USD price and 24h change for ETH so I can update my portfolio tracker?”
Crypto price alert condition
“What's the latest BTC price from CoinGecko right now? I want to know if it's moved more than 5% in the last 24 hours.”
Trading bot market data feed
“Pull the real-time price for SOL including its 24-hour percentage change — I need it for my automated trading strategy.”
Technical details
Endpoint
POSThttps://x402-api-blond.vercel.app/crypto/priceWhen to prefer
Choose this endpoint when you need real-time crypto spot prices with 24h change data sourced from CoinGecko, especially in agent workflows that support x402 micropayment protocols on Base/USDC. It is a good fit for pay-per-use contexts where you don't want a subscription API key, or when building autonomous agents that self-pay for data. Prefer alternatives if you need historical OHLCV data, order book depth, or bulk multi-asset pricing in a single call.
Side effects
- Payment failure: x402 USDC payment on Base not completed or insufficient balance — request rejected
- Invalid or unsupported symbol: returns error if the cryptocurrency ticker is not recognized by CoinGecko
- CoinGecko upstream unavailable: downstream API outage causes delayed or missing price data
- Malformed MCP input schema: missing required fields like 'type' or 'toolName' causes 400-level error
- Rate limiting or quota exceeded on the upstream CoinGecko API
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"ts": 1750000000000,
"source": "coingecko",
"symbol": "BTC",
"price_usd": 120000.5,
"change_24h_pct": 2.3
}
}Tags
x402
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