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Crypto Order Book Depth API
x402
Crypto Order Book Depth API is a paid API for AI agents from api.webbersites.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).
Returns live bid/ask ladder with analytics (mid, spread, slippage estimates) for crypto pairs normalized across Coinbase, Binance.US, and Kraken
Price / call$0.05
Success—
StatusUnknown
How this service works
L2 ORDER-BOOK DEPTH — the live bid/ask ladder for any crypto pair, normalized across Coinbase, Binance.US and Kraken (auto-fallback, or pick a source). Returns bids/asks to your depth plus the analytics that matter: mid, spread (absolute + bps), book liquidity per side, and slippage estimates for $1k/$10k/$100k market orders both directions. Deterministic, no keys, ~1.5s cache. ?pair=BTC-USD&depth=50&source=auto
Output
Returns a structured object with full bids/asks arrays at the requested depth, best bid/ask objects, mid price, absolute spread and spread in basis points, per-side liquidity in quote currency, and slippage estimates for $1k/$10k/$100k market orders in both directions, sourced from whichever exchange was selected or auto-selected.
Example use cases
Example prompt
“Pull the live order book for BTC-USD with 50 levels per side using auto source selection, and tell me the current spread in basis points plus how much slippage I'd face on a $10k market buy.”
Technical details
Endpoint
GEThttps://api.webbersites.com/api/orderbookWhen to prefer
Choose this endpoint when you need normalized, cross-exchange order book data for crypto pairs with built-in analytics like spread, slippage estimates, and liquidity depth — especially when you want auto-fallback across Coinbase, Binance.US, and Kraken without managing multiple exchange connections yourself. Ideal for trading bots, pre-trade analysis, and market microstructure queries.
Side effects
- Invalid pair format (not BASE-QUOTE style) returns an error
- Depth out of range (outside 1-200) may return default or error
- All three exchange sources unavailable causes fetch failure
- Unknown source parameter value returns an error
- Network timeout from upstream exchange causes stale or empty response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"mid": 62655.35,
"asks": [
[
62655.35,
0.4
]
],
"bids": [
[
62655.34,
1.25
]
],
"pair": "BTC-USD",
"source": "coinbase",
"spread": 0.01,
"best_ask": {
"size": 0.4,
"price": 62655.35
},
"best_bid": {
"size": 1.25,
"price": 62655.34
},
"slippage": {
"buy": [
{
"fillable": true,
"notional": 100000,
"avg_price": 62658.15,
"filled_base": 1.596,
"vs_best_bps": 0.45
}
],
"sell": [
"…"
]
},
"spread_bps": 0.002,
"liquidity_quote": {
"asks": 764210.9,
"bids": 812443.1
}
}
}Tags
x402
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