This is the official Java driver for Factual's API:

Driver Documentation

• Getting Started
• Debugging and Support

Querying Factual Data

• Get a Single Row
• Query Filters
• Field Selection
• Row Filters
• Geo Filters
• Paging: Limit and Offset
• Sorting Results
• Improving Search Results

Other APIs

• Crosswalk API
• Match API and Resolve API

Supporting Calls & Services

• Facets Call
• Schema Call

Using Specific Datasets

• World Geographies
• Global Products
• Products Crosswalk

Other Items & Miscellany

• Raw Requests
• Set Request Timeout

API Documentation

• Factual REST API Documentation
• Factual Support