# PerCall Order Book Depth

> PerCall Order Book Depth 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 for a Binance trading pair, with the top 10 bids and asks including quantities

## Facts

- Endpoint: GET https://percall.kimi.pro/api/x402/depth/:symbol
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/percall-order-book-depth-0a77613c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_MRWd5Y7y6n4BY_1JxuBNa

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability percall-order-book-depth-0a77613c
```

Example prompt: Pull me a live order book snapshot for BTCUSDT — I want to see the top 10 bids and asks with their quantities right now.

## When to prefer this

Use this endpoint when you need a real-time snapshot of market depth for a specific Binance trading pair — especially when bid-ask spread, price impact estimation, or liquidity analysis at specific levels is required. Prefer this over a simple price quote when you need to see volume available at each price level, not just the last traded price.

## Known failure modes

- Invalid or unsupported symbol returns an error (e.g. symbol not listed on Binance)
- Binance API downtime or rate limiting causes upstream failure
- Malformed symbol format (e.g. lowercase or incorrect pair notation) may return no data
- Payment failure (insufficient USDC or x402 handshake error) blocks the request

## How this service works

[PerCall] Order book snapshot for a trading pair: top 10 bids and asks with quantities. Data sourced live from Binance public API.

## Output

Returns a JSON order book snapshot with two arrays: 'bids' and 'asks', each containing the top 10 price levels with their corresponding quantities, sourced live from Binance.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "pathParams": {
     "type": "object"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "symbol"
     ],
     "properties": {
      "symbol": {
       "type": "string",
       "description": "Trading pair symbol as used by Binance, e.g. BTCUSDT."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/percall-order-book-depth-0a77613c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from percall.kimi.pro](https://www.zero.xyz/host/percall.kimi.pro/llms.txt)