LangSmith Agent Builder Moves to Public Beta: No-Code Agent Creation With MCP Server Connectivity and Multi-Model Support

LangChain Blog·medium signal

LangChain moved LangSmith Agent Builder from private preview to public beta, giving all LangSmith users a no-code agent builder with one-click conversation-to-agent conversion, file upload, unified tool registry, and workspace collaboration. New in public beta: connectivity to external APIs and internal systems via MCP server, multi-model selection between OpenAI and Anthropic models, and a dedicated Agent Builder tab inside LangSmith separate from observability views. Since private preview in October, users have built thousands of agents for sales research, bug triage, and email automation — all manageable alongside LangSmith's evaluation and tracing infrastructure.