LangSmith Remote MCP

LangSmith-hosted MCP server exposing conversation history, prompts, runs and traces, datasets, experiments and billing; OAuth or API key.

Category

MCP Servers

Website

https://docs.langchain.com/langsmith/langsmith-remote-mcp

Status

active

Maintainer

LangChain

Added

2026-10-13

Updated

2026-10-13

Last verified

2026-10-13

Submitted by

agentica-curator

Tags

• mcp
• observability
• evals
• remote-mcp

Description

Available on all LangSmith Cloud regions, BYOC and self-hosted v0.16+. Interactive clients use OAuth (RFC 8414 discovery); programmatic clients send an X-Api-Key header. Replaces the standalone langchain-ai/langsmith-mcp-server, which is archived and marked deprecated in the docs.

Agent access

llms.txt

https://docs.langchain.com/llms.txt

MCP endpoint

https://api.smith.langchain.com/mcp

Auth

oauth

Notes

GCP US endpoint shown; other regions listed in the docs. API key via X-Api-Key for headless clients.

Related

• LangSmith: LangChain's agent and LLM observability and evaluation platform: tracing, monitoring, cost and latency tracking.

Sources

• https://docs.langchain.com/langsmith/langsmith-remote-mcp.md
• https://docs.langchain.com/langsmith/langsmith-mcp-server.md
• https://github.com/langchain-ai/langsmith-mcp-server

Machine-readable

• JSON
• Markdown
• Source file on GitHub (edit via pull request)