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Order Book Depth & Slippage
x402
Order Book Depth & Slippage is a paid API for AI agents from bess-x402.onrender.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-29).
Returns spot order book data for OKX, Gate, or Kraken including best bid/ask, spread in bps, USD depth at 0.5%/1%/2%, and average fill price/slippage for a given USD order size.
Price / call$0.003
Success—
StatusUnknown
How this service works
Spot order book on OKX, Gate or Kraken: best bid/ask, spread in bps, USD depth within 0.5%, 1% and 2% of mid, and the average fill price and slippage to market-buy or sell a given USD size.
Output
Returns the best bid and ask prices, spread in basis points, available USD liquidity within 0.5%, 1%, and 2% of the mid price, and (when size_usd is provided) the estimated average fill price and slippage in basis points for a market buy or sell of that USD notional.
Example use cases
Pre-trade slippage check for large order
“I'm about to market-buy $200,000 worth of ETH on Kraken — can you check the order book and tell me what average fill price and slippage I should expect?”
Cross-venue liquidity comparison
“Compare the bid-ask spread and depth within 1% of mid for BTC-USDT on OKX versus Gate — I want to know which venue has tighter liquidity right now.”
Real-time spread monitoring for arbitrage
“What's the current spread in basis points and best bid/ask for ETH-USD on Kraken? I'm monitoring for arbitrage opportunities.”
Technical details
Endpoint
GEThttps://bess-x402.onrender.com/v1/crypto/orderbook?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need real-time order book microstructure data — specifically spread, depth, and slippage estimates — for crypto spot markets on OKX, Gate, or Kraken. Prefer it over generic price feeds when execution quality, market impact, or liquidity analysis is the goal rather than just a last-traded price.
Side effects
- Unsupported trading pair for the selected venue returns an error or empty data
- Invalid venue name (not okx, gate, or kraken) causes a 400 or similar error
- Exchange API downtime or rate limiting may result in stale or missing data
- Very illiquid pairs may show zero depth at certain price bands
- size_usd larger than total available book depth will produce incomplete slippage estimates
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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