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Welcome to the Investigator API Guide

Your complete resource for tax research and data lookup integration

The Investigator API provides programmatic access to CCH SureTax tax research data — including product taxability, jurisdiction details, rate lookups, and regulatory content. Use this guide to get up and running quickly.

Quick Start Guide

Get your first API call running in minutes. Covers authentication, basic requests, and response handling.

API Reference

Full endpoint documentation with request/response schemas, field definitions, enumerations, and code samples.

Common Use Cases

14 real-world scenarios including SKU taxability analysis, jurisdiction lookups, regulatory research, PGPI mapping, rate change monitoring, saved search workflows, health monitoring, and audit compliance workflows.

Get Started with the Quick Start Guide