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Financial Data x402 – Crypto Pair Price
x402
Financial Data x402 – Crypto Pair Price is a paid API for AI agents from x402financialdata.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-08).
Returns the current cross-rate price and 24-hour USD change percentages for any cryptocurrency pair (e.g. BTC/ETH), sourced from CoinGecko, via a pay-per-call x402 micropayment.
Price / call$0.01
Success—
StatusUnknown
How this service works
Pay-per-call stock, macro, on-chain, and crypto data over the x402 protocol. USDC on Base or Solana, no API keys, no subscriptions.
Output
A JSON object containing the cross-rate price of the base/quote pair (e.g. BTC/ETH = 33.75), the as-of timestamp, the 24-hour percentage price change in USD for both the base and quote coins separately, CoinGecko IDs and market cap ranks for both coins, and the data source. Note: a combined pair 24h-change is intentionally omitted to avoid inaccuracy from two independently cached legs.
Example use cases
Live cross-rate for trading decision
“What is the current SOL/BTC price right now, and how has each coin changed in USD over the last 24 hours? I want to know if SOL has outperformed BTC today.”
Portfolio rebalancing reference price
“I'm rebalancing my portfolio — can you pull the live ETH/BNB exchange rate and the 24h USD performance for both coins so I can decide which one to trim?”
Crypto pair price alert check
“Check the current price of AVAX quoted in ETH and tell me what each coin's 24-hour USD change percentage is — I want to see if the ratio has shifted meaningfully today.”
Technical details
Endpoint
GEThttps://x402financialdata.com/crypto-pair/%7Bbase%7D/%7Bquote%7DWhen to prefer
Choose this endpoint when you need a real-time cryptocurrency cross-rate price (non-USD quote) without committing to an API key or subscription — ideal for AI agents that call price data infrequently or across many pairs, paying $0.01 USDC per call via x402. Prefer this over CoinGecko direct if you want trustless micropayment access on Base or Solana. Not ideal for high-frequency trading requiring millisecond latency or bulk batch pricing.
Side effects
- Unknown or unsupported cryptocurrency symbol returns an error or empty result
- Payment failure via x402 (insufficient USDC balance or unsupported chain) blocks the request
- CoinGecko data staleness if the cache window has not refreshed yet (check as_of timestamp)
- Malformed URL path parameters (e.g. spaces or lowercase variants) may return 4xx errors
- Rate limiting or service unavailability on the upstream CoinGecko feed
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"base": "BTC",
"note": "No combined ratio 24h-change is provided -- combining two independently-cached USD legs into a synthetic ratio change was unreliable and dropped rather than shipped inaccurate. Use base_change_24h_pct_usd/quote_change_24h_pct_usd instead.",
"pair": "BTC/ETH",
"as_of": "2026-07-31T03:43:30.000Z",
"price": 33.7577077484,
"quote": "ETH",
"source": "coingecko",
"base_info": {
"name": "Bitcoin",
"coingecko_id": "bitcoin",
"market_cap_rank": 1
},
"quote_info": {
"name": "Ethereum",
"coingecko_id": "ethereum",
"market_cap_rank": 2
},
"base_change_24h_pct_usd": 0.32,
"quote_change_24h_pct_usd": -0.6
}
}Tags
x402
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