expand.ai Documentation
Web data extraction API for AI and LLM applications
expand.ai is a high-performance web data platform built for the AI era. Extract clean content from any webpage, fetch batches of URLs at scale, or query structured web databases through a single API.
Why expand.ai?
Built from the ground up to power the next generation of AI agents and LLM applications.
Progressive Disclosure
Extract clean, structured markdown optimized for LLM context windows.
State JSON
Use selected page and network JSON evidence alongside Markdown.
Batched Fetch
Start captures for many URLs and poll paginated results.
Developer First
Simple API, comprehensive SDKs, and a powerful CLI.