# agenttoll.dev ISBN Book Lookup

> agenttoll.dev ISBN Book Lookup is a paid API for AI agents from agenttoll.dev, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).

Looks up book metadata and bibliographic information by ISBN-10 or ISBN-13 identifier

## Facts

- Endpoint: POST https://agenttoll.dev/paid/academic/isbn
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agenttoll-dev-isbn-book-lookup-3b39b674
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_kmn5z4V9SsWLroEWyhXbf

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 agenttoll-dev-isbn-book-lookup-3b39b674 -d '<json body>'
```

Example prompt: Can you look up the book details for ISBN 978-0-262-03384-8? I need the title, author, and publisher.

## When to prefer this

Use this endpoint when you need to resolve an ISBN to structured book metadata programmatically, especially in academic, research, or library contexts. Prefer this over web scraping or manual lookup when you need consistent structured output and are processing ISBNs at scale or within an automated agent workflow. It is a pay-per-call endpoint ($0.02 USDC) suited for on-demand lookups rather than bulk cataloging.

## Known failure modes

- ISBN not found in database — returns empty or error response
- Malformed ISBN string (wrong length, invalid check digit) — validation error
- ISBN exists but metadata is sparse or incomplete
- Network timeout or service unavailability
- Payment failure via x402 protocol before request is processed

## How this service works

108+ receipt-backed x402 work products for AI agents. Clear prices, spend caps, buyer metadata, and structured results over Base USDC.

## Output

Returns a JSON object containing bibliographic metadata for the book identified by the provided ISBN, typically including title, author(s), publisher, publication date, edition, and other available catalog information.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "isbn": {
   "type": "string",
   "description": "string ISBN-10 or ISBN-13"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agenttoll-dev-isbn-book-lookup-3b39b674/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agenttoll.dev](https://www.zero.xyz/host/agenttoll.dev/llms.txt)