What are business APIs?

Business APIs provide programmatic access to company information, corporate registries, VAT numbers, business entity lookups, and commercial data for due diligence and B2B applications.

Can I look up a company by registration number through an API?

Yes. APIs like Companies House (UK) and OpenCorporates allow you to query companies by registration number and retrieve details like directors, filing history, and registered address.

What can I build with a business data API?

You can build KYB (Know Your Business) verification tools, CRM enrichment pipelines, competitor research dashboards, and supplier due diligence platforms using the APIs in this directory.

Business APIs

Business data and services

23 APIs in this category

Showing 23 of 23 APIs

Apache Superset

API to manage BI dashboards, charts, and data sources in Superset

Auth: apiKey HTTPS CORS: Yes

Charity Search

Non-profit and charity organization data lookup API

Auth: apiKey HTTPS CORS: Unknown

Clearbit Logo

Retrieve company logos and branding information by domain

Auth: apiKey HTTPS CORS: Unknown

Domainsdb.info

Search registered domain names and WHOIS information

Auth: No HTTPS CORS: No

Freelancer

API for hiring freelancers, posting projects, and managing jobs

Auth: OAuth HTTPS CORS: Unknown

Gmail

RESTful access to Gmail inbox, threads, and message management

Auth: OAuth HTTPS CORS: Unknown

Google Analytics

Collect, configure, and analyze analytics data for websites and apps

Auth: OAuth HTTPS CORS: Unknown

Instatus

Update and manage incidents and maintenance messages on your status page

Auth: apiKey HTTPS CORS: Unknown

Mailchimp

Send email marketing campaigns and manage contacts

Auth: apiKey HTTPS CORS: Unknown

Mailjet

Send marketing and transactional emails using MJML or HTML templates

Auth: apiKey HTTPS CORS: Unknown

Markerapi

Trademark search and lookup API

Auth: No HTTPS CORS: Unknown

ORB Intelligence

Company lookup API for business and industry information

Auth: apiKey HTTPS CORS: Unknown

Redash

Access queries, dashboards, and data visualizations from Redash

Auth: apiKey HTTPS CORS: Yes

Smartsheet

Programmatic access to Smartsheet data, sheets, and account info

Auth: OAuth HTTPS CORS: No

Square

Payments API for processing transactions, refunds, and customer checkout

Auth: OAuth HTTPS CORS: Unknown

SwiftKanban

Kanban project management API to visualize and improve workflows

Auth: apiKey HTTPS CORS: Unknown

Tenders in Hungary

Retrieve procurement data for Hungary in JSON format

Auth: No HTTPS CORS: Unknown

Tenders in Poland

Retrieve procurement data for Poland in JSON format

Auth: No HTTPS CORS: Unknown

Tenders in Romania

Retrieve procurement data for Romania in JSON format

Auth: No HTTPS CORS: Unknown

Tenders in Spain

Retrieve procurement data for Spain in JSON format

Auth: No HTTPS CORS: Unknown

Tenders in Ukraine

Retrieve procurement data for Ukraine in JSON format

Auth: No HTTPS CORS: Unknown

Tomba Email Finder

Find and verify professional emails for B2B marketing and outreach

Auth: apiKey HTTPS CORS: Yes

Trello

Manage boards, lists, and cards to organize projects and tasks

Auth: OAuth HTTPS CORS: Unknown

API	Description	Auth	HTTPS	CORS
Apache Superset	API to manage BI dashboards, charts, and data sources in Superset	apiKey	✓	✓
Charity Search	Non-profit and charity organization data lookup API	apiKey	✗	?
Clearbit Logo	Retrieve company logos and branding information by domain	apiKey	✓	?
Domainsdb.info	Search registered domain names and WHOIS information	No	✓	✗
Freelancer	API for hiring freelancers, posting projects, and managing jobs	OAuth	✓	?
Gmail	RESTful access to Gmail inbox, threads, and message management	OAuth	✓	?
Google Analytics	Collect, configure, and analyze analytics data for websites and apps	OAuth	✓	?
Instatus	Update and manage incidents and maintenance messages on your status page	apiKey	✓	?
Mailchimp	Send email marketing campaigns and manage contacts	apiKey	✓	?
Mailjet	Send marketing and transactional emails using MJML or HTML templates	apiKey	✓	?
Markerapi	Trademark search and lookup API	No	✗	?
ORB Intelligence	Company lookup API for business and industry information	apiKey	✓	?
Redash	Access queries, dashboards, and data visualizations from Redash	apiKey	✓	✓
Smartsheet	Programmatic access to Smartsheet data, sheets, and account info	OAuth	✓	✗
Square	Payments API for processing transactions, refunds, and customer checkout	OAuth	✓	?
SwiftKanban	Kanban project management API to visualize and improve workflows	apiKey	✓	?
Tenders in Hungary	Retrieve procurement data for Hungary in JSON format	No	✓	?
Tenders in Poland	Retrieve procurement data for Poland in JSON format	No	✓	?
Tenders in Romania	Retrieve procurement data for Romania in JSON format	No	✓	?
Tenders in Spain	Retrieve procurement data for Spain in JSON format	No	✓	?
Tenders in Ukraine	Retrieve procurement data for Ukraine in JSON format	No	✓	?
Tomba Email Finder	Find and verify professional emails for B2B marketing and outreach	apiKey	✓	✓
Trello	Manage boards, lists, and cards to organize projects and tasks	OAuth	✓	?

Best Business APIs for Developers

A business API allows developers to access company profiles, corporate registry data, VAT validation, and business entity information programmatically. These APIs power KYB verification, CRM enrichment, and B2B data pipelines.

CodeHelper's curated business API collection includes APIs covering company lookups, corporate registries, business validation, and commercial data services.

What to look for in a business API

Data freshness: Corporate registry data changes frequently; prefer APIs that synchronize with official sources regularly.
Global coverage: For international B2B apps, choose APIs that cover multiple jurisdictions and countries.
VAT validation: EU VAT number validation is critical for e-commerce businesses serving European customers.

How to use this API directory

Browse the curated list of APIs below.
Click any API to visit its documentation.
Check the Auth column to understand what credentials you need.

Whether you are building a KYB verification tool or a B2B data enrichment service, this free curated API directory saves you hours of research.

Business APIs

Apache Superset

Charity Search

Clearbit Logo

Domainsdb.info

Freelancer

Gmail

Google Analytics

Instatus

Mailchimp

Mailjet

Markerapi

ORB Intelligence

Redash

Smartsheet

Square

SwiftKanban

Tenders in Hungary

Tenders in Poland

Tenders in Romania

Tenders in Spain

Tenders in Ukraine

Tomba Email Finder

Trello

Best Business APIs for Developers

What to look for in a business API

How to use this API directory

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