AGPC Domain Check API vs Kickbox API

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

The verdict

Choose AGPC Domain Check API if its data fits your use case better; on access and reliability it's level with Kickbox API.
Choose Kickbox API if its data fits your use case better; on access and reliability it's level with AGPC Domain Check API.

	AGPC Domain Check API	Kickbox API
What it does	Check a domain's SPF, DKIM, DMARC and MX with a graded shareable report.	Email verification API. A free email API by Powered by Kickbox.
Provider	guild.tradeuniquecapital.com	Powered by Kickbox
API key	Not needed	Not needed
HTTPS	Yes	Yes
CORS (browser calls)	Yes	Yes
Status today	Last check failed	Online · 1026 ms
Uptime (30 days)	Down	Up
Developer rating	Not rated yet	Not rated yet
Price	Free / free tier	Free / free tier

Check a domain's SPF, DKIM, DMARC and MX with a graded shareable report.

Strengths

Email verification API. A free email API by Powered by Kickbox.

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.