Launch Library 2 API vs MathJS API

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

The verdict

Choose Launch Library 2 API if its data fits your use case better; on access and reliability it's level with MathJS API.
Choose MathJS API if its data fits your use case better; on access and reliability it's level with Launch Library 2 API.

	Launch Library 2 API	MathJS API
What it does	Spaceflight launches and events database.	Evaluate math expressions via GET or POST as JSON.
Provider	TheSpaceDevs	math.js web service
API key	Not needed	Not needed
HTTPS	Yes	Yes
CORS (browser calls)	Yes	Yes
Status today	Online · 876 ms	Online · 934 ms
Uptime (30 days)	Up	Up
Developer rating	Not rated yet	Not rated yet
Price	Free / free tier	Free / free tier

Spaceflight launches and events database.

A group of space enthusiast developers working on services to improve accessibility of spaceflight information.

Strengths

Evaluate math expressions via GET or POST as JSON.

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.