BizAPI Business Intelligence API

Real-time REST API from the NAICS Association that returns firmographic data on over 220 million US and international business locations. Provides DUNS numbers, SIC codes, NAICS codes, company details, contact information, sales volume, employee counts, and corporate hierarchy. Supports both live production and test (sandbox) endpoints. Rate limited to 3 requests per rolling second. Authentication via HTTP Basic with credentials provided at account activation.