Features
Cloud MCP hosting with auto-deploy from GitHub
mcp-use SDK for building MCP servers and apps
Cloud Inspector for real-time debugging across models
Cross-client testing against ChatGPT, Claude, Gemini, Copilot
Publishing checks for ChatGPT Apps Store and Claude Connectors
Auto-generated submission assets and marketplace checklists
Embeddable public chat surfaces
Analytics, session replay, and observability
Branch preview deployments with unique URLs per PR
Custom domain support with automatic SSL
Team management and organization workflows
Cold-start prevention on Hobby and above
Templates for common MCP frameworks and use cases
Usage-based pricing with monthly credit pool
Published as ChatGPT App and Claude Connector
Trace agent executions step by step
Monitor real-time dashboards with cost tracking
Online LLM-as-judge evals for quality scoring
Automated insights with unsupervised topic clustering
SmithDB purpose-built for agent traces
Sub-second query performance across millions of traces
Full-text search with inverted index
JSON key-path filtering and trajectory queries
Self-host SmithDB inside your VPC
LangSmith Engine for autonomous issue detection and fixes
Deploy and scale agents with LangSmith Deployment
Sandboxes for safe agent-generated code execution
Fleet agents for no-code agent creation
Supports Python, TypeScript, Go, Java SDKs
