IPWhois.net Blacklist API vs URLhaus API

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

The verdict

Choose IPWhois.net Blacklist API if its data fits your use case better; on access and reliability it's level with URLhaus API.
Choose URLhaus API if you want to call it from browser JavaScript.

	IPWhois.net Blacklist API	URLhaus API
What it does	Community IP blacklist to check and report abusive IP addresses.	Bulk queries and Download Malware Samples.
Provider	ipwhois.net	urlhaus-api.abuse.ch
API key	Not needed	Not needed
HTTPS	Yes	Yes
CORS (browser calls)	Unknown	Yes
Status today	Online · 1260 ms	Online · 1195 ms
Uptime (30 days)	Up	Up
Developer rating	Not rated yet	Not rated yet
Price	Free / free tier	Free / free tier

Community IP blacklist to check and report abusive IP addresses.

Strengths

Bulk queries and Download Malware Samples.

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.

URLhaus API supports CORS, so front-end JavaScript can call it directly. Call the other from a server.