langchain is by langchain-ai — not by us.
We indexed this project so people can find it. We are not selling it, we host no copy of the code, and we are not affiliated with or endorsed by its authors — get it from them.
Indexed Aug 3, 2026 · 143,299 stars at index time. Maintainers: claiming verifies your identity and unlocks a higher assurance tier. Removal requests are honored.
AI agent · for humans & their agents
langchain
unclaimed listingactively maintainedFreeMIT
The agent engineering platform.
by Open Source Community · New publisher
Every claim on this page is refundable if it is untrue — refund policy.
langchain-ai/langchain is an open-source project by langchain-ai: The agent engineering platform.. Indexed here so it can be found — not resold.
It is free. Get it from the upstream repository: https://github.com/langchain-ai/langchain
From the project's own README (excerpt, reproduced for discovery under its MIT license):
The agent engineering platform.
LangChain is a framework for building agents and LLM-powered applications. It helps you chain together interoperable components and third-party integrations to simplify AI application development — all while future-proofing decisions as the underlying technology evolves.
> Just getting started? Check out Deep Agents — a higher-level package built on LangChain for agents that have built-in capabilites for common usage patterns such as planning, subagents, file system usage, and more.
Quickstart
If you're looking for more advanced customization or agent orchestration, check out LangGraph, our framework for building controllable agent workflows.
For an equivalent JS/TS library, check out LangChain.js.
> For developing, debugging, and deploying AI agents and LLM applications, see LangSmith.
LangChain ecosystem
While the LangChain framework can be used standalone, it also integrates seamlessly with any LangChain product, giving developers a full suite of tools when building LLM applications. • Deep Agents — Build agents that can plan, use subagents, and leverage file systems for complex tasks • LangGraph — Build agents that can reliably handle complex tasks with our low-level agent orchestration framework • Integrations — Chat & embedding models, tools & toolkits, and more • LangSmith — Agent evals, observability, and debugging for LLM apps • LangSmith Deployment — Deploy and scale agents with a purpose-built platform for long-running, stateful workflows
Why use LangChain?
LangChain helps developers build applications powered by LLMs through a standard interface for models, embeddings, vector stores, and more. • Real-time data augmentation — Easily connect LLMs to diverse data sources and external/internal…
Preview
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01Capabilities
Does
- + Workflow builder
- + LLM output parsing
- + Agent tool-call orchestration
Doesn’t
- No exclusions declared
02Requirements & stack
Depends on
No declared dependencies
Credentials needed
None declared
Stack
03Community
No endorsements yetNo verified confirmations yet — be the first.
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Issues 0
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04Trust Passport
Full passport →0/0 automated components pass. An automated score is never a security guarantee.
This listing is unclaimed, so publisher identity cannot be verified and it stays below the “verified” tier by design — that is a statement about the listing, not about the project’s quality. Our automated scans still ran; a maintainer who claims it unlocks identity verification.
- publisher identity Publisher status verified; 0 verification(s) on file
- malicious pattern scan No known malicious-behavior patterns across listing text only — no source artifact published
- capability contract All 0 observed capability reference(s) match the declared manifest
- agent safety scan No tool-poisoning or injection patterns in agent-readable content (agent-facing product)
- provenance No release signature or provenance attestation
- behavioral sandbox Not performed in this environment — requires the production isolated runner (docs/sandbox-requirements.md). No untrusted code is ever executed on the application host.
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05Versions
Full history →| Version | Channel | Released | Notes |
|---|---|---|---|
| 0.0.0 | stable | Aug 3, 2026 | Indexed listing — see the upstream repository for real release history. |