OpenCorporates

OpenCorporates is the world's largest open database of companies, providing a REST API for searching and retrieving company registration data, officer information, and corporate filings globally across more than 140 jurisdictions.

API

The OpenCorporates API (v0.4.8) provides programmatic access to company registration data. Authentication is via API token passed as a query parameter (api_token).

Base URL: https://api.opencorporates.com/v0.4

Key Endpoints

• GET /companies/search - Search companies by name
• GET /companies/:jurisdiction_code/:company_number - Retrieve company details
• GET /companies/:jurisdiction_code/:company_number/filings - Retrieve statutory filings
• GET /officers/search - Search officers and directors
• GET /officers/:id - Retrieve individual officer details
• GET /jurisdictions - List available jurisdictions
• GET /account_status - Check API usage and remaining quota

Authentication

API token via query parameter: ?api_token=YOUR_TOKEN

Obtain a token at: https://opencorporates.com/api_accounts/new

Plans

Plan	Annual Cost	Monthly Calls	Daily Limit
Free	£0	200	50
Essentials	£2,250	500	200
Starter	£6,600	2,500	500
Basic	£12,000	5,000	1,000
Enterprise	Custom	Custom	Custom

Public benefit access is available for qualifying journalists, NGOs, universities, and anti-corruption research organizations.

Links

• Website: https://opencorporates.com
• API Documentation: https://api.opencorporates.com/documentation/API-Reference
• Pricing: https://opencorporates.com/pricing/
• Status: https://status.opencorporates.com/
• Blog: https://blog.opencorporates.com
• GitHub: https://github.com/openc
• LinkedIn: https://www.linkedin.com/company/opencorporates
• X: https://twitter.com/opencorporates