Penguin Publishing API vs Quran API

Two free Books APIs compared on access, reliability and developer ratings, using data from our daily health checks.

The verdict

Choose Penguin Publishing API if its data fits your use case better; on access and reliability it's level with Quran API.
Choose Quran API if its data fits your use case better; on access and reliability it's level with Penguin Publishing API.

	Penguin Publishing API	Quran API
What it does	Books, book covers and related data.	RESTful Quran API with multiple languages.
Provider	penguinrandomhouse.biz	API
API key	Not needed	Not needed
HTTPS	Yes	Yes
CORS (browser calls)	Yes	Yes
Status today	Online · 2410 ms	Online · 2855 ms
Uptime (30 days)	Up	Up
Developer rating	Not rated yet	Not rated yet
Price	Free / free tier	Free / free tier

Books, book covers and related data.

Strengths

RESTful Quran API with multiple languages.

API documentation for OpenAPI versions 2.0/3.0/3.1

Strengths

Prototyping or a tutorial? Pick the one that needs no API key (both qualify).
Calling from a web page? You need CORS. Otherwise route requests through your own server or a serverless function.
Going to production? Favour HTTPS, a strong uptime record and a provider with clear rate limits and terms. Check each API's docs before you commit.
Still unsure? Both are free to try: send one request to each and compare the data you get back.

Neither needs an API key; you can call both straight away.