# fastapi.online — Kraken Order Book Lookup

> fastapi.online — Kraken Order Book Lookup is a paid API for AI agents from api.fastapi.online, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).

Fetches the current order book (bids and asks) for a specified Kraken trading pair

## Facts

- Endpoint: POST https://api.fastapi.online/kraken-orderbook
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/fastapi-online-kraken-order-book-lookup-91ebb3df
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_OQOrjLvv8fd1I4XmXE_xC

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 fastapi-online-kraken-order-book-lookup-91ebb3df -d '<json body>'
```

Example prompt: Pull the current Kraken order book for the XBT/USD pair so I can see the top bids and asks.

## When to prefer this

Use this endpoint when you need real-time order book data from the Kraken exchange specifically, especially when you want to analyze bid-ask spread, market depth, or available liquidity at specific price levels for a crypto trading pair. Prefer over generic market data APIs if you specifically need Kraken's order book structure.

## Known failure modes

- Invalid or unsupported trading pair symbol returns an error
- Network or service unavailability returns a 5xx error
- Payment failure (insufficient funds or x402 protocol issue) blocks the request
- Empty or stale order book if the pair has low liquidity

## How this service works

Chat, embeddings, OCR, speech-to-text, image editing, image understanding (captioning/Q&amp;A), text-to-speech, translation, writing tools, classification tools, developer tools, local utilities, format/checksum validators, encoding &amp; crypto utilities, date/time calculators, geo/coordinate math, math &amp; finance calculators, novelty tools, and business/social writing generators — 179 endpoints in all, across multiple specialized self-hosted models. Pay per call with crypto — no signup — or get an API key.

## Output

Returns the live order book for the specified Kraken trading pair, including lists of bids and asks with price levels and available quantities at each level.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "pair": {
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/fastapi-online-kraken-order-book-lookup-91ebb3df/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.fastapi.online](https://www.zero.xyz/host/api.fastapi.online/llms.txt)