PTD Business Data Services

Property Tax Detective — Business-facing REST API providing property tax analysis, appeal management, user accounts, ordering, and county data services.

Browse API Documentation »

API Reference

Browse all available endpoints, request/response models, and HTTP methods exposed by this service.

View Help »

Counties Supported

Cook, Lake, DuPage, Kane, McHenry, and Will counties in Illinois.

Authentication

All endpoints require a valid OAuth 2.0 bearer token issued by the PTD Auth Data Service.