KontragentPro
Business
Russian company data from state registers by INN or OGRN: profile, finances, timeline
No keyCORSHTTPS
Markbase
Search 14M+ USPTO trademarks with fuzzy search and autocomplete
Verified 4 days ago: 100% uptime
API key
Not required
HTTPS
Supported
Browser calls
No, needs a proxy
Status
Live · 100/100
What our checks found
- Health score
- 100/100
- Reliability
- 100%
- Average latency
- 656ms
Last checked 2026-09-18. Measured independently, not self-reported by the provider.
How to call it
A starting template for Markbase. Replace ENDPOINT with the path from the official documentation, which we link above rather than guess at.
# No authentication required.
curl -s "https://markbase.co/ENDPOINT" \
-H "Accept: application/json"This API does not send CORS headers, so a browser will block a direct call from your front end. Call it from your server, or put a small proxy in front of it.
Where this listing comes from
Aggregated from one public source (public-api-lists), then normalised and checked by us. If something here is wrong, tell us and we will correct it.
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Markbase — common questions
Answered from what our own scheduled checks found, not from the provider's marketing.
Is Markbase free to use?
Markbase is listed in our free catalogue and required no credential when we called it. It needs no authentication at all, so you can send a request without signing up. Free tiers can still carry rate limits or non-commercial terms, so check the provider's own terms before shipping.
Does Markbase need an API key?
No. We called Markbase on 2026-09-18 with no key, no token and no Authorization header, and it responded. That is what puts it in our no-key collection.
Can I call Markbase from browser JavaScript?
Not directly. Markbase did not return CORS headers when we checked, so the browser will block your page from reading the response even though the request itself succeeds. Call it from a server, or put a small proxy in front of it.
Is Markbase still working?
Yes, as of 2026-09-18. Our automated check reached Markbase and recorded a 100% reliability score with a median response time of 656 ms. We re-check on a schedule, and this page updates with the result.
Is Markbase available over HTTPS?
Yes. Markbase serves over HTTPS, so you can call it from a secure page without triggering a mixed-content block.