langchain-ai/langchain-extract

Health v2 · maintenance only

Flags: archived

Adoption not part of the score

1193 stars · 120 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

A FastAPI-based web server that uses LLMs to extract structured information from text and files, with extractors defined via JSON Schema and stored in PostgreSQL. It is an archived example/reference implementation meant as a starting point for building custom extraction applications, not a maintained library.

Use cases

• extract structured data from text using llms
• build an llm-powered information extraction service
• parse entities from pdfs and html files
• define extraction schemas with json schema and few-shot examples
• self-host an extraction api with fastapi

When to choose

• you want a reference implementation to copy when building your own LLM extraction app
• you need a working example of FastAPI + LangChain extraction with a REST API

When to avoid

• you need a maintained, production-ready extraction library
• you expect stable APIs or bug fixes - the repo is archived and unmaintained
• you want to install it as a dependency rather than fork the code

Facets

service · maturity abandoned

llm-inference rag http-server api-framework nlp large-language-models data-science apis developer-tools python self-hosted llm-extraction fastapi langchain json-schema reference-implementation archived natural-language-processing web-server docker

Member repositories

For agents

markdown · JSON · MCP: product_card(name="langchain-ai/langchain-extract")