# Saylor Innovations ISBN Lookup

> Saylor Innovations ISBN Lookup is a paid API for AI agents from saylorinnovations.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-02).

Returns book metadata (title, authors, publisher, description, cover image) for a given ISBN

## Facts

- Endpoint: GET https://saylorinnovations.com/api/books/isbn/:isbn?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/saylor-innovations-isbn-lookup-69f14185
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_DBsh8SfoTT0OwRGCGgGYC

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 saylor-innovations-isbn-lookup-69f14185
```

Example prompt: Can you look up the book with ISBN 9780743273565 and give me the title, authors, publisher, and a description?

## When to prefer this

Choose this endpoint when you have a specific ISBN and need structured bibliographic metadata quickly. It is ideal for barcode-scan workflows, catalog enrichment, or verifying book details. Prefer it over a general book search when you already know the exact ISBN and want precise, direct lookup rather than keyword-based search results.

## Known failure modes

- ISBN not found in the database returns an empty or 404 response
- Malformed or invalid ISBN format may return an error
- Some older or obscure ISBNs may have incomplete metadata (missing cover or description)
- Rate limiting or payment failure may interrupt the request

## How this service works

ISBN Lookup: title, authors, publisher, description, cover. ISBN lookup (checksum-validated ISBN-10/13): title, authors, publisher, publish date, pages, languages, subjects, description, first published and cover image.

## Output

Returns structured bibliographic metadata for the queried ISBN, including the book's title, list of authors, publisher name, a textual description or summary, and a URL to the cover image.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/saylor-innovations-isbn-lookup-69f14185/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from saylorinnovations.com](https://www.zero.xyz/host/saylorinnovations.com/llms.txt)