API Terms/Data & Enrichment/ISBNdb API

ISBNdb API

isbndb.com

Provides programmatic access to book metadata (searchable by ISBN, title, author, or publisher) from a database of over 111 million books.

The ISBNdb API API uses API key authentication; has paid pricing. Verified 2026-07-26 with per-field source links.

Data & Enrichment Verified 2026-07-26 low confidence

Base URL

https://api2.isbndb.com

Auth

API key

Free tier

not documented null

no source

Pricing model

paid

Pricing

not documented null

no source

Rate limits

not documented null

no source

OpenAPI spec

not documented null

no source

MCP server

not documented null

no source

Why trust this

▸Every field links to the exact page that states it.
▸Re-checked on a schedule — last verified 2026-07-26.
▸Honest nulls: "not documented" is data, never a guess.

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Machine-readable

# this record as JSON GET https://apiterms.com/api/isbndb.com/record.json