# langchain-ai/langchain-extract

🦜⛏️ Did you say you like data?

Repository: https://github.com/langchain-ai/langchain-extract
Canonical: https://ross.abutalabs.com/products/langchain-extract
Language: Rich Text Format
License: MIT
License Family: permissive
Topics: extraction, extraction-data, fastapi, langchain, langchain-python, llm, llms
Archived: true
Last push: 2026-02-10T00:52:28+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 66, release rhythm 8, longevity 65
- inputs: {"age_days": 916, "days_push": 205, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: archived
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1193, forks 120 (observed 2026-08-28T04:03:56.488565+00:00)

## What it is
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
- artifact type: service
- maturity: abandoned
- function: llm-inference, rag, http-server, api-framework, nlp
- domain: large-language-models, data-science, apis, developer-tools
- platform: python, self-hosted
- tags: llm-extraction, fastapi, langchain, json-schema, reference-implementation, archived, natural-language-processing, web-server, docker

## Member repositories
- langchain-ai/langchain-extract (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:56.488565+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T06:22:14.255053+00:00, confidence not recorded.
  - readme: https://github.com/langchain-ai/langchain-extract (fetched 2026-08-28T04:03:56.488565+00:00, sha 7e69881d0e49)
- Data as of 2026-08-30T08:39:29.467469+00:00.