# Usenami Aggregate Depth Quote — Single Venue Crypto Perpetual

> Usenami Aggregate Depth Quote — Single Venue Crypto Perpetual is a paid API for AI agents from api.usenami.io, paid per call via x402, $0.01/call, status down (last checked 2026-10-18).

Returns best bid/ask plus precomputed slippage estimates at $1K, $5K, and $10K notional for a single crypto perpetual on a specified venue, giving execution-realistic cost insight beyond the top of book.

## Facts

- Endpoint: GET https://api.usenami.io/v1/orderbook/depth/aggregate/:venue/:symbol?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: down
- Last checked: 2026-10-18
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/usenami-aggregate-depth-quote-single-venue-crypto-perpetual-636bb9ac
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_AkigynQEtpdvmtZHNYGH3

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 usenami-aggregate-depth-quote-single-venue-crypto-perpetual-636bb9ac
```

Example prompt: What's the actual execution cost — best bid/ask plus slippage at $1K, $5K, and $10K — for BTC-PERP on Bybit right now?

## When to prefer this

Choose this endpoint when you need execution-realistic cost data for a single specific venue rather than a cross-venue consolidated view. It is ideal for pre-trade analysis, algo signal ingestion, or venue comparison workflows where per-venue slippage at multiple notional tiers matters more than just the top-of-book spread. Prefer the single-venue aggregate depth endpoint over the top-of-book-only endpoint when market impact and slippage are relevant to the decision.

## Known failure modes

- Unknown or unsupported venue returns 404 or empty result
- Symbol not tracked returns error or null data
- Order book data temporarily unavailable returns stale or error response
- Exceeding $10K notional cap returns an error per DIS-022 policy
- Authentication or payment failure (x402) returns 402 Payment Required

## How this service works

Sized-depth quote for one crypto perpetual on one venue: best bid/ask plus precomputed slippage at $1K/$5K/$10K notional — what your order actually costs, not just the top of book. $10K cap protects execution edge per DIS-022.

## Output

Returns the best bid and best ask prices for the specified perpetual on the given venue, plus precomputed estimated slippage at three notional tiers ($1K, $5K, $10K), reflecting what an order would actually cost to execute given current order book depth. Capped at $10K notional per the DIS-022 execution-edge protection policy.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/usenami-aggregate-depth-quote-single-venue-crypto-perpetual-636bb9ac/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.usenami.io](https://www.zero.xyz/host/api.usenami.io/llms.txt)