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Saylor Innovations Crypto Order Book Depth & Slippage
x402
Saylor Innovations Crypto Order Book Depth & Slippage is a paid API for AI agents from saylorinnovations.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-16).
Returns slippage cost, spread, average fill price, and best venue to buy or sell a crypto asset for a given USD trade size across Coinbase, Kraken, Bitstamp, and Gemini order books.
Price / call$0.01
Success—
StatusUnknown
How this service works
Crypto slippage - what a USD trade size costs on the Coinbase, Kraken, Bitstamp and Gemini order books, with spread, average fill price, slippage percent and best venue to buy or sell
Output
A JSON object containing, for each responding exchange, the best bid, best ask, spread percent, number of order book levels fetched, and buy/sell sub-objects with average fill price and slippage percent. Also includes top-level fields for the best venue to buy, best venue to sell, total venues responding, trade size in USD, the coin symbol, and a timestamp of when the check was run.
Example use cases
Pre-trade slippage check for large BTC buy
“I'm about to buy $500,000 of BTC — can you check slippage and average fill price across Coinbase, Kraken, Bitstamp and Gemini, and tell me which exchange to use?”
Best venue to liquidate SOL position
“I need to sell $200,000 worth of SOL. Which exchange — Coinbase, Kraken, Bitstamp, or Gemini — will give me the least slippage and the best average sell price right now?”
Spread monitoring for algo trading setup
“Pull the current bid-ask spread and order book depth for ETH across all four major exchanges for a $50,000 trade size so I can decide where to route my orders.”
Technical details
Endpoint
GEThttps://saylorinnovations.com/api/crypto/orderbook/depth?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need real-time, multi-exchange order book slippage and execution cost analysis for a specific USD trade size. It is ideal for pre-trade routing decisions, comparing execution quality across Coinbase, Kraken, Bitstamp, and Gemini simultaneously, or any workflow where minimizing market impact of a large crypto trade matters. Prefer it over single-exchange ticker APIs when cross-venue comparison and slippage quantification are the goal.
Side effects
- Exchange API unavailable — that venue is excluded from results and venues_responding count drops
- Invalid coin symbol — endpoint may return empty venues or an error
- Trade size outside 100–10,000,000 USD range — may return an error or unexpected result
- Insufficient order book depth for requested trade size — slippage figures may be null or incomplete
- Network timeout fetching live order book data — checked_at may reflect stale or partial data
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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