omnischolar / openlibrary

v1.0.1 2026-11-13 14:57 UTC

Requires

• php: >=8.2
• omnisense/omnischolar: ^1.0
• symfony/http-client: ^6.4|^7.0|^8.0

Requires (Dev)

• phpunit/phpunit: ^11.0

MIT

• Marco Meyer

• ISBN
• books
• openlibrary
• publications
• scholarly
• covers
• omnischolar

Published on Packagist.org on 2026-11-14 02:14 UTC

README

Open Library for omnisense/omnischolar: an author's books, one record per edition - its ISBNs, publisher, date, cover - for the Merger to group the editions of each book; a book by ISBN or Open Library id; a search; an author's page. No key.

$openlibrary = (new OpenLibrarySourceFactory($http))->create(['mailto' => '[e-mail]']);
$editions = $openlibrary->works('Alain Aspect');          // every spelling of the name, every edition
$books = (new Merger())->merge($editions);                 // one record per book, its editions inside
$openlibrary->work('9780521004220');

omnischolar:
    sources:
        openlibrary:
            factory: openlibrary
            options:
                mailto: '[e-mail]'   # in the User-Agent, as Open Library asks
                editions: true                 # false: one record per work
                throttle: 0.4                  # seconds between two calls

See docs/.

Install

composer require omnischolar/openlibrary

It brings the family's core, omnisense/omnischolar, and omnisense/contracts with it. No account and no key; a mailto of yours, in the User-Agent as Open Library asks (policy.json). $http is HttpClient::create() in plain PHP.

Usage policy

Declared as data in policy.json (read at https://openlibrary.org/developers/api on 2026-11-10), and honoured on every request by the core: a limit reached waits when its window ends within max_wait seconds, else the request is not sent (Usage policies).

• Limits: 1 a second.
• Licence: not stated; commercial use: unknown.
• Credit: not required.
• Needs: nothing.
• With a User-Agent naming a contact (the factory's does when mailto is given): 3 a second (OpenLibrarySource::usagePolicy()).

Responsibility

This package is an independent, unofficial client: it is not affiliated with, endorsed by or sponsored by the Internet Archive (Open Library). It reaches their service on behalf of whoever runs it, and it does not redistribute their data beyond the short excerpts recorded as test fixtures. Its MIT licence covers this package's code only and grants no right to the service or to its data.

Whoever installs and runs this package is responsible for complying with the Internet Archive's terms (archive.org/about/terms), for obtaining whatever they require (an account, a key, a licence or subscription, an attribution or a citation, a rate limit to respect), and for any use made of what it returns. The authors publish it free of charge, make no commercial use of it, and accept no liability for how it is used (see LICENSE).

License: MIT since 2026-10-09; earlier versions remain published under LGPL-3.0-or-later.