Best Business APIs in 2026

The top 15 of 44 free Business APIs, ranked by how easy they are to start with (API key, HTTPS, CORS), how reliable they are in our daily health checks, and what developers rate them. Legal Sandbox Georgia API takes the top spot.

Last tested Oct 24, 2026 · Rankings update daily

1
Legal Sandbox Georgia API
Online · 563 ms
Find verified legal specialists in Georgia from natural-language queries.
- No API key needed
- Returns JSON at its URL
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
2
Verif Entreprise FR API
Online · 699 ms
French company checks by SIREN: status, insolvency (BODACC), VAT (VIES); free preview.
- No API key needed
- Returns JSON at its URL
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
3
KontragentPro API
Online · 719 ms
Russian company data from state registers by INN or OGRN: profile, finances, timeline.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
4T
TradeDataHub API
Online · 1008 ms
U.S. contractor datasets with a free discovery API for coverage, pricing and masked previews.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
5
Tomba email finder API
Online · 532 ms
Email Finder for B2B sales and email marketing and email verifier.
- Callable from the browser (CORS)
- HTTPS
apiKeyHTTPSCORS
6
UGC VZ API
Online · 602 ms
Directory of DACH user-generated-content creators with topics, cities, rates and contact requests.
- No API key needed
- HTTPS
No authHTTPSNo CORS
7I
InvoiceIn API
Online · 988 ms
Parse and validate received e-invoices: XRechnung, ZUGFeRD, Peppol, FatturaPA, KSeF.
- Callable from the browser (CORS)
- HTTPS
apiKeyHTTPSCORS
8
Domainsdb.info API
Online · 1343 ms
Access our comprehensive domain database through a powerful API.
- No API key needed
- HTTPS
No authHTTPSNo CORS
9
EuroValidate API
Online · 1433 ms
EU VAT (VIES), IBAN and EORI validation with company name & address lookup.
- Callable from the browser (CORS)
- HTTPS
apiKeyHTTPSCORS
10
GlobalEntity API
Online · 1254 ms
Official company data from 56 European business registers as normalized JSON.
- Callable from the browser (CORS)
- HTTPS
apiKeyHTTPSCORS
11
Meirra API
Online · 1634 ms
SEO monitoring, email verification, lead generation, and marketing analytics.
- Callable from the browser (CORS)
- HTTPS
apiKeyHTTPSCORS
12
Village API
Online · 1416 ms
Person and company enrichment plus warm introduction paths through your network.
- Callable from the browser (CORS)
- HTTPS
apiKeyHTTPSCORS
13
Instatus API
Online · 986 ms
Post to and update maintenance and incidents on your status page through an HTTP REST API.
- HTTPS
apiKeyHTTPSCORS ?
14
RankFabrik Places API
Online · 568 ms
Search businesses and points of interest by city, deduplicated with a coverage report.
- HTTPS
apiKeyHTTPSCORS ?
15
Redash API
Online · 1514 ms
Access your queries and dashboards on Redash.
- Callable from the browser (CORS)
- HTTPS
apiKeyHTTPSCORS

Business APIs compared

Top Business APIs compared
API	API key	HTTPS	CORS	Uptime	Response	Rating
Legal Sandbox Georgia	No	Yes	Yes	Up	563 ms	Not rated
Verif Entreprise FR	No	Yes	Yes	Up	699 ms	Not rated
KontragentPro	No	Yes	Yes	Up	719 ms	Not rated
TradeDataHub	No	Yes	Yes	Up	1008 ms	Not rated
Tomba email finder	Required	Yes	Yes	Up	532 ms	Not rated
UGC VZ	No	Yes	No	Up	602 ms	Not rated
InvoiceIn	Required	Yes	Yes	Up	988 ms	Not rated
Domainsdb.info	No	Yes	No	Up	1343 ms	Not rated
EuroValidate	Required	Yes	Yes	Up	1433 ms	Not rated
GlobalEntity	Required	Yes	Yes	Up	1254 ms	Not rated

More Business APIs

Best Business API FAQ

What is the best free Business API in 2026?

Based on access, reliability and developer ratings, the top free Business APIs right now are Legal Sandbox Georgia API, Verif Entreprise FR API and KontragentPro API. Legal Sandbox Georgia API ranks first. Rankings update daily from health checks of all 44 Business APIs in the directory.

What is the best Business API without an API key?

Legal Sandbox Georgia API, Verif Entreprise FR API and KontragentPro API need no API key, so you can call them without signing up. 13 of the 44 ranked Business APIs are keyless.

Which Business API works from the browser?

Legal Sandbox Georgia API, Verif Entreprise FR API and KontragentPro API support CORS over HTTPS, so front-end JavaScript can call them directly without a proxy.

How are these APIs ranked?

Each API gets a score from: no API key (+), HTTPS (+), CORS support (+), 30-day uptime and response time from our daily health checks, and ratings from developers on this site. APIs that failed three checks in a row are left out until they recover.