Documentation Index
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Documentation
LangChain is the platform for agent engineering. AI teams at Clay, Rippling, Cloudflare, Workday, and more trust LangChain’s products to engineer reliable agents.LangSmith
LangSmith is a platform that helps AI teams use live production data for continuous testing and improvement. LangSmith provides:
Observability
See exactly how your agent thinks and acts with detailed tracing and aggregate trend metrics.
Engine (Beta)
Automatically detect and resolve recurring issues in your tracing projects.
Evaluation
Test and score agent behavior on production data or offline datasets to continuously improve performance.
Prompt Engineering
Iterate on prompts with version control, prompt optimization, and collaboration features.
Deployment
Ship your agent in one click, using scalable infrastructure built for long-running tasks.
LLM Gateway (Private beta)
Proxy LLM calls to enforce spend limits, redact sensitive data, and centrally manage provider credentials.
LangSmith meets the highest standards of data security and privacy with HIPAA, SOC 2 Type 2, and GDPR compliance. Meet with our team to learn more or visit our Trust Center.
LangSmith Fleet
Fleet
Create helpful AI agents without code. Start from a template, connect your accounts, and let the agent handle routine work while you stay in control.
Open source agent frameworks
- Python
- TypeScript
Deep Agents (Python)
Quickly build agents that can tackle any task.
LangChain (Python)
Customize the building blocks of your agents.
LangGraph (Python)
Control every step of your custom agent with low-level orchestration, memory, and human-in-the-loop support.
Get started
Build your first agent with LangChain
Sign up for LangSmith
Build an advanced agent with LangGraph
Enroll in LangChain Academy
Additional resources
Community forum
Ask questions, share solutions, and discuss best practices.
Community Slack
Connect with other builders and get quick help.
Support portal
Submit tickets and track support requests.
LangSmith status
Real-time status of LangSmith services and APIs.