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Usenami Orderbook Depth Quote — Single Venue/Symbol
x402
Usenami Orderbook Depth Quote — Single Venue/Symbol is a paid API for AI agents from api.usenami.io, paid per call via x402, $0.002/call, status down (last checked 2026-10-17).
Returns best bid/ask, per-side depth, and estimated slippage in basis points over mid for a specific crypto perpetual on a named exchange venue.
Price / call$0.002
Success—
StatusDown
How this service works
Depth quote for one crypto perp on ONE named venue: best bid/ask, depth per side, and est_slippage_for_size_usd_bps — the cost of filling size_usd here, in BASIS POINTS over the mid, not dollars. On a book deep enough to fill at the touch it equals half the spread and is the same for $1K/$5K/$10K; on a thinner book it grows with size. Equal values across sizes mean the book covers you, not that size_usd was ignored. All venues: /v1/orderbook/multi-venue-slippage. $10K cap per DIS-022.
Output
Returns the best bid and ask prices, available liquidity depth per side of the book, and est_slippage_for_size_usd_bps — a pre-computed estimate of fill cost in basis points over the mid price. On deep books this equals roughly half the spread regardless of size; on thin books it increases with order size. Capped at $10K notional per call (DIS-022).
Example use cases
Pre-trade slippage check before execution
“Before I place a $10K buy on ETH-PERP on Bybit, can you tell me how deep the book is and how many basis points of slippage I should expect over the mid?”
Assess liquidity on a thin DEX venue
“How liquid is the SOL-PERP market on Hyperliquid right now — give me the best bid/ask and the estimated slippage cost in bps to fill $1,000 notional.”
Monitor execution cost for algorithmic trading
“I need to know the current orderbook depth and basis-point slippage estimate for AVAX-PERP on OKX — I'm deciding whether the spread is tight enough to trade here.”
Technical details
Endpoint
GEThttps://api.usenami.io/v1/orderbook/depth/:venue/:symbol?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need slippage cost in basis points and depth data for a single specific venue and symbol pair — ideal for pre-trade analysis, execution cost modeling, or deciding whether a particular venue is liquid enough. Use /v1/orderbook/multi-venue-slippage instead when you want to compare slippage across all venues simultaneously. Use the top-of-book endpoint if you only need best bid/ask without depth or slippage estimates.
Side effects
- Unknown venue name returns 404 or error — must use exact venue identifiers from supported venue list
- Unsupported symbol returns empty or error response
- Book is temporarily unavailable for a venue, returning stale or null data
- size_usd above $10K cap may be rejected or clamped per DIS-022
- Network latency may cause slightly stale snapshot data in fast-moving markets
Tags
x402
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