501(c)(3) verification API

A programmatic 501(c)(3) lookup endpoint by EIN — returns the nonprofit's name, address, NTEE classification code, ruling date, and tax-exempt status. Pulls from Every.org and ProPublica Nonprofit Explorer (with license). Critical for any third-party platform that needs to verify nonprofit status, list verified nonprofits, or auto-enrich donor data. Free for the first thousand calls per month.