Kickbox API vs MailSenpai DNS Check API

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

The verdict

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

	Kickbox API	MailSenpai DNS Check API
What it does	Email verification API. A free email API by Powered by Kickbox.	Check a domain's SPF, DKIM, DMARC and MX records and get what to fix, with the values to publish.
Provider	Powered by Kickbox	MailSenpai
API key	Not needed	Not needed
HTTPS	Yes	Yes
CORS (browser calls)	Yes	Yes
Status today	Online · 1026 ms	Online · 805 ms
Uptime (30 days)	Up	Up
Developer rating	Not rated yet	Not rated yet
Price	Free / free tier	Free / free tier

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

Strengths

Check a domain's SPF, DKIM, DMARC and MX records and get what to fix, with the values to publish.

Free JSON API that checks a domain's SPF, DKIM, DMARC and MX records and returns what to fix, with the values to publish. No key, CORS enabled.

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.