KontragentPro
Business
Russian company data from state registers by INN or OGRN: profile, finances, timeline
No keyCORSHTTPS
Free Business APIs
Company records, invoicing, CRM, analytics and productivity services.
46 listed · 16 need no key · 12 work in the browser
Legal Sandbox Georgia
Business
Find verified legal specialists in Georgia from natural-language queries
No keyCORSHTTPS
Pick an Agency
Business
Search 47,000+ marketing agencies by service, location and rating
No keyCORSHTTPS
Auregistre
Business
French company history since 2008 from the BODACC gazette, no key required
No keyHTTPS
Domainsdb.info
Business
Registered Domain Names Search
No keyHTTPS
Favicon.im
Business
Instantly fetch and display the favicon for any website
No keyHTTPS
Markbase
Business
Search 14M+ USPTO trademarks with fuzzy search and autocomplete
No keyHTTPS
markerapi
Business
Trademark Search
No key
Mydentify
Business
The Mydentify Public API allows users to access product directories and weekly leaderboard data. It enables the creation of product listings and supports requests without an API key, making it user-friendly for developers.
No keyHTTPS
SCALA Score
Business
Search 250M+ company records across 50+ countries with revenue, employees, and credit scores
No keyHTTPS
Tenders in Hungary
Business
Get data for procurements in Hungary in JSON format
No keyHTTPS
Tenders in Poland
Business
Get data for procurements in Poland in JSON format
No keyHTTPS
Tenders in Romania
Business
Get data for procurements in Romania in JSON format
No keyHTTPS
Tenders in Spain
Business
Get data for procurements in Spain in JSON format
No keyHTTPS
Tenders in Ukraine
Business
Get data for procurements in Ukraine in JSON format
No keyHTTPS
TradeDataHub
Business
U.S. contractor datasets with a free discovery API for coverage, pricing and masked previews
No keyHTTPS
Apache Superset
Business
API to manage your BI dashboards and data sources on Superset
API keyCORSHTTPS
biz collect
Business
Business contact data from a location and keywords, including emails
API keyCORSHTTPS
Charity Search
Business
Non-profit charity data
API keyCORS
GlobalEntity
Business
Official company data from 56 European business registers as normalized JSON
API keyCORSHTTPS
Instatus
Business
Post to and update maintenance and incidents on your status page through an HTTP REST API
API keyCORSHTTPS
InvoiceIn
Business
Parse and validate received e-invoices: XRechnung, ZUGFeRD, Peppol, FatturaPA, KSeF
API keyCORSHTTPS
Invovate
Business
Generate PDF, JSON & UBL invoices in 11 languages from one JSON POST
API keyCORSHTTPS
Katalis UK Company Enrichment
Business
Verified UK company profiles with an AI summary and accuracy score, from Companies House data
API keyCORSHTTPS
All 46 Business APIs
- KontragentPro
- Legal Sandbox Georgia
- Pick an Agency
- Auregistre
- Domainsdb.info
- Favicon.im
- Markbase
- markerapi
- Mydentify
- SCALA Score
- Tenders in Hungary
- Tenders in Poland
- Tenders in Romania
- Tenders in Spain
- Tenders in Ukraine
- TradeDataHub
- Apache Superset
- biz collect
- Charity Search
- GlobalEntity
- Instatus
- InvoiceIn
- Invovate
- Katalis UK Company Enrichment
- Meirra
- Clearbit Logo
- Clientsbee
- Freelancer
- Funding Signals
- Gmail
- Google Analytics
- LogoKit
- MailboxValidator
- Mailchimp
- mailgun
- mailjet
- ORB Intelligence
- Redash
- Signaliz
- Smartsheet
- Square
- SwiftKanban
- Tomba email finder
- Tomba Email finder
- Trello
- Village
Free Business APIs — common questions
Counts and timings below come from our own scheduled checks of this category.
How many free business APIs are there?
We track 46 in this category, of which 36 responded at our last check. 16 of them need no API key.
Which business APIs work without an API key?
16 of the 46 entries here need no credential. Filter this page by "no key" to see them, or browse the no-key collection for every keyless API across all categories.
Can I use these business APIs in a browser app?
3 entries in this category need no key and return CORS headers, which is the combination that lets you call them straight from client-side JavaScript. The rest need a server or a proxy in between.
Which is the fastest free business API?
Of the keyless options that responded at our last check, Auregistre was quickest at a median 426 ms. Speed is only one factor — coverage and licensing usually matter more — but it is measured here rather than claimed.
How do you know these APIs still work?
We call every listing on a schedule and record the status code, response time and whether CORS headers came back. Those results drive the badges on this page. Across the whole catalogue, 487 of 2,712 entries were not responding at the last full run, which is the sort of thing an unchecked list never tells you.