Domainsdb.info API vs KontragentPro API

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

The verdict

Choose Domainsdb.info API if its data fits your use case better; on access and reliability it's level with KontragentPro API.
Choose KontragentPro API if you want to call it from browser JavaScript, faster responses.

	Domainsdb.info API	KontragentPro API
What it does	Access our comprehensive domain database through a powerful API.	Russian company data from state registers by INN or OGRN: profile, finances, timeline.
Provider	DomainsDB API	KontragentPro API v2
API key	Not needed	Not needed
HTTPS	Yes	Yes
CORS (browser calls)	No	Yes
Status today	Online · 1343 ms	Online · 719 ms
Uptime (30 days)	Up	Up
Developer rating	Not rated yet	Not rated yet
Price	Free / free tier	Free / free tier

Access our comprehensive domain database through a powerful API.

Strengths

Russian company data from state registers by INN or OGRN: profile, finances, timeline.

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.

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