# Book Pricer

> Book Pricer is a paid API for AI agents from book-pricer.hungatea.workers.dev, paid per call via x402, $0.06/call, status unknown (last checked 2026-09-14).

Returns lowest Amazon and AbeBooks prices by condition (new, like new, very good, good) for a book identified by ISBN or keyword query

## Facts

- Endpoint: GET https://book-pricer.hungatea.workers.dev/api/search
- Price: $0.06/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/book-pricer-b1b381f4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_2yJjo9aMMBIRghP6uuHcM

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 book-pricer-b1b381f4
```

Example prompt: Can you find me the lowest prices for ISBN 9780140449136 across Amazon and AbeBooks, broken down by condition — new, like new, very good, and good?

## When to prefer this

Use this endpoint when you need real-time price comparisons across Amazon and AbeBooks for a specific book, especially when condition-based pricing (new vs used) matters. It is ideal for agents helping users find the cheapest copy of a book, comparing textbook prices, or evaluating whether a used copy is worth the savings. Prefer this over general product search APIs when the domain is specifically books and you want multi-condition pricing from both major used/new book marketplaces in a single call.

## Known failure modes

- ISBN not found on either platform — returns empty or null price fields
- Keyword query too broad — may return unrelated editions or no results
- Network timeout from upstream Amazon/AbeBooks scraping
- Invalid ISBN format — query may return keyword-style results instead of exact edition
- Book out of stock on one or both platforms — partial results returned

## How this service works

Book price search: lowest Amazon + AbeBooks prices by condition (new/like new/very good/good) for an ISBN or keyword query. Same JSON as the Book Pricer app.

## Output

A JSON object matching the Book Pricer app format, containing lowest prices from Amazon and AbeBooks for each available condition (new, like new, very good, good), potentially covering up to 10 editions when a keyword query is used instead of a specific ISBN.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "q"
     ],
     "properties": {
      "q": {
       "type": "string",
       "description": "ISBN (10 or 13 digits) for exact-edition pricing, or title/author keywords for up to 10 editions"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/book-pricer-b1b381f4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from book-pricer.hungatea.workers.dev](https://www.zero.xyz/host/book-pricer.hungatea.workers.dev/llms.txt)