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SperaxOS x402 Markets API
x402
SperaxOS x402 Markets API is a paid API for AI agents from chat.sperax.io, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).
Returns paginated cryptocurrency market data (price, volume, market cap, 24h change) for all coins, payable per-request via x402 USDC micropayment on Base.
Price / call$0.005
Success—
StatusUnknown
How this service works
AI-powered DeFi intelligence APIs payable via the x402 HTTP payment protocol. No API key required — pay per request with USDC on Base. Identity-only (SIWX) endpoints are free for wallets with an agentcash identity.
Output
An array of coin objects, each containing the CoinGecko coin ID, human-readable name, ticker symbol, current price in the requested currency, market capitalization, total 24-hour trading volume, and 24-hour price change percentage. Returned as a JSON array, paginated according to the page and per_page parameters.
Example use cases
DeFi portfolio market snapshot
“Give me a full market snapshot of the top 100 crypto assets priced in USD — I need the current price, market cap, and 24-hour change for each one so I can see how my DeFi holdings are tracking.”
Crypto market screener for trading bot
“Fetch the first page of crypto markets sorted by default, 100 results per page in USD — my trading bot needs to scan which coins moved more than 5% in the last 24 hours.”
Multi-page crypto data pipeline
“I need to pull all available cryptocurrency market data across multiple pages, 250 results per page, priced in EUR — start with page 1 and I'll keep requesting until I have everything.”
Technical details
Endpoint
GEThttps://chat.sperax.io/api/x402/marketsWhen to prefer
Choose this endpoint when you need broad cryptocurrency market data (prices, volumes, market caps) across many coins without pre-registering for an API key, and your agent can handle x402 micropayments in USDC on Base. Ideal for pay-as-you-go DeFi intelligence pipelines, trading bots, or portfolio dashboards that need fresh market data on demand. Prefer over traditional market data APIs when avoiding key management overhead or when operating within a Web3/agentic payment workflow.
Side effects
- 402 Payment Required if x402 USDC payment on Base is not attached or insufficient
- Invalid vs_currency value returns empty or error response
- per_page exceeding 250 may be rejected or clamped
- Invalid page number (e.g. page beyond available data) returns empty array
- Network timeout if Base payment settlement is delayed
- Wallet without agentcash identity may face restricted access on free-tier endpoints
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| page | integer | Page number |
| order | string | Sort order |
| per_page | integer | Results per page (default: 100, max: 250) |
| vs_currency | string | Target currency (default: usd) |
Output
Schema · Response
{
"type": "array",
"items": {
"type": "object",
"properties": {
"id": {
"type": "string",
"description": "CoinGecko coin ID"
},
"name": {
"type": "string",
"example": "Bitcoin"
},
"symbol": {
"type": "string",
"example": "btc"
},
"market_cap": {
"type": "number",
"example": 1300000000000
},
"total_volume": {
"type": "number",
"example": 30000000000
},
"current_price": {
"type": "number",
"example": 67000
},
"price_change_percentage_24h": {
"type": "number",
"example": 2.5
}
}
}
}Tags
x402
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