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Proofwork Crypto Price API
x402
Proofwork Crypto Price API is a paid API for AI agents from proofwork-the402-webhook.phase-voice.workers.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).
Returns current prices and 24-hour change percentages for one or more cryptocurrencies in a specified fiat currency, payable per request via x402 on Base.
Price / call$0.005
Success—
StatusUnknown
How this service works
Small non-cyber evidence and data APIs payable per request with x402 on Base.
Output
A JSON object containing a list of coin entries — each with the queried ticker, resolved coin ID, current price in the requested currency, and 24-hour percent change — along with the fiat currency used, a report type label, and the UTC timestamp when the prices were observed.
Example use cases
Portfolio value snapshot
“Can you grab the current prices of BTC, ETH, and SOL in USD so I can see how my portfolio is doing today?”
Crypto price alert dashboard
“Fetch the latest prices and 24-hour percent changes for BTC, ETH, BNB, and ADA — I want to see which ones moved the most overnight.”
Euro-denominated crypto pricing
“What are the current prices of Bitcoin and Ethereum in EUR, including their 24-hour change percentages?”
Technical details
Endpoint
GEThttps://proofwork-the402-webhook.phase-voice.workers.dev/v1/crypto-priceWhen to prefer
Choose this endpoint when you need lightweight, pay-per-use cryptocurrency price lookups with no subscription required, particularly in agentic or automated workflows that already use the x402 micropayment protocol on Base. It is well-suited for fetching prices for multiple coins in a single call and supports non-USD fiat currencies. Prefer alternatives if you need order book depth, historical OHLCV data, or trading execution.
Side effects
- Invalid or unrecognized coin ticker returns no result or an error for that coin
- Unsupported currency code (outside 2-8 alpha chars) returns a 400 validation error
- Empty or missing 'coins' query parameter returns a 400 error
- Payment not fulfilled via x402 results in a 402 Payment Required response
- coins string exceeding 1800 characters may be rejected
- Network or worker downtime returns a 5xx error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"coins": [
{
"id": "bitcoin",
"price": 63000,
"query": "BTC",
"change_24h_percent": -0.2
},
{
"id": "ethereum",
"price": 1880,
"query": "ETH",
"change_24h_percent": 0.4
}
],
"report": "crypto_price",
"currency": "usd",
"observed_at": "2026-08-16T00:00:00.000Z"
}
}Tags
x402
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