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PerCall Order Book Depth — Real-time Crypto Market Data
x402
PerCall Order Book Depth — Real-time Crypto Market Data is a paid API for AI agents from percall.kimi.pro, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-13).
Returns a live order book snapshot (top bids and asks with quantities) for a given crypto trading pair, paid per request via x402/USDC on Base.
Price / call$0.005
Success—
StatusUnknown
How this service works
PerCall is an x402 payment gateway selling live crypto market data to AI agents and developers. No accounts, no API keys: request, receive HTTP 402, pay in USDC on Base, get data.
Output
A JSON object containing the trading pair symbol, a timestamp, a lastUpdateId, and two arrays — bids and asks — each containing price-quantity pairs (as strings) representing the top levels of the live order book.
Example use cases
Arbitrage spread detection
“Check the current order book for ETHUSDT and tell me the best bid and best ask prices so I can see how wide the spread is.”
Algorithmic trading entry signal
“Before placing a buy order, fetch the live order book depth for SOLUSDT so I can see how much liquidity is sitting at the top of the book.”
Market impact estimation
“I want to sell 5 BTC — pull the current BTCUSDT order book so I can estimate how much my order would move the market.”
Technical details
Endpoint
GEThttps://percall.kimi.pro/api/x402/depth/%7Bsymbol%7DWhen to prefer
Choose this endpoint when you need real-time bid/ask depth data with no account setup or API key management — ideal for AI agents making one-off or infrequent queries where a subscription is overkill. Prefer this over exchange WebSocket APIs when you want pay-per-use pricing and don't need a persistent stream. Best for spot checks on liquidity, spread analysis, or pre-trade market impact estimation.
Side effects
- Invalid or unrecognized symbol (e.g. typo or delisted pair) returns an error
- HTTP 402 payment required if x402 payment flow is not completed
- Network or upstream Binance data unavailability may cause timeouts or stale data
- Symbol must match Binance naming convention exactly (e.g. BTCUSDT not BTC/USDT)
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"asks": [
[
"67432.20",
"0.318"
]
],
"bids": [
[
"67432.10",
"0.521"
]
],
"symbol": "BTCUSDT",
"timestamp": "2026-08-28T00:00:00.000Z",
"lastUpdateId": 741258963
}
}Tags
x402
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