> ## Documentation Index
> Fetch the complete documentation index at: https://docs.extend.ai/llms.txt
> Use this file to discover all available pages before exploring further.
>
> ## API version
> The current API version is `2026-02-09`, served at the site root (no version prefix in URLs).
> If this page URL contains `/2025-04-21/` or `/2024-12-23/`, you are reading an older API version.
> Prefer the current docs at https://docs.extend.ai/llms.txt unless the user explicitly needs that older version.
> Do not treat older-version pages as the source of truth for new integrations.

# Extraction

> Ship your document processing with Extend. Get started with our APIs, SDKs, and guides.

## Docs

- [Extraction Overview](https://docs.extend.ai/extraction/overview.md): Extract turns any document into structured JSON defined by a schema and backed by citations. Learn how it works, then run it in minutes.
- [Extraction Configuration](https://docs.extend.ai/extraction/configuration.md): Configure the Extract API: base processor, extraction rules, citations, large-array handling, chunking, and the underlying parse.
- [Extraction Response Format](https://docs.extend.ai/extraction/response-format.md): Understand the Extract response: top-level fields, the value and metadata objects, confidence scores, and source citations with page references and bounding boxes.
- [Field Names and Prompt Crafting](https://docs.extend.ai/extraction/best-practices/field-names-and-prompt-crafting.md): Complete guide to designing effective extractors, including schema definition, field configuration, and prompt engineering best practices.
- [Latency Optimization](https://docs.extend.ai/extraction/best-practices/latency-optimization.md): Quick guide to reducing extraction latency with the most impactful configuration changes.
- [Extraction Schema](https://docs.extend.ai/extraction/schema.md): Define your extractor’s output using JSON Schema, with examples and links to deeper docs.
- [Multifile Extraction](https://docs.extend.ai/extraction/multifile.md): Extract structured data from multiple documents in a single run using the package field.
- [Confidence Scores](https://docs.extend.ai/extraction/confidence-scores.md): How Extend scores its confidence in each extracted value, how to read those scores, and how to route on them.
- [Review Agent](https://docs.extend.ai/extraction/review-agent.md): The Review Agent analyzes extraction results to flag issues and produce an intelligent confidence score that improves on logprobs and OCR-based scores.
- [Operator](https://docs.extend.ai/extraction/operator.md): Agent-guided extraction for long, complex, table-heavy documents.