LangSmith MCP Server
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- AlicenseNot gradedqualityCmaintenanceEnables AI agents to access observability and evaluation data, including run history, span traces, LLM-as-judge evaluation results, and regression reports.MIT

LangSmith MCP Serverofficial
AlicenseAqualityFmaintenanceEnables language models to access LangSmith observability platform features including fetching conversation history, managing prompts, retrieving traces and runs, working with datasets and examples, and analyzing experiments.1322,602 PyPI131MIT- AlicenseBqualityDmaintenanceQuery Langfuse traces, schema and datasets, scores and metrics, debug exceptions, analyze sessions, and manage prompts. Full observability toolkit for LLM applications.553MIT
- AlicenseNot gradedqualityDmaintenanceEnables LLM clients to query SQL databases via natural language with read-only, AST-validated, and capped queries, ensuring safety guarantees.2MIT
- AlicenseNot gradedqualityCmaintenanceEnables read-only access to SwanLab workspaces, projects, runs, and metrics through the Model Context Protocol.10MIT
- FlicenseNot gradedqualityCmaintenanceEnables running read-only SQL queries and exploring DuckDB databases through MCP tools like listing tables, describing schemas, and fetching paginated data.-
TDQS
Scored across 5 tools
Each tool targets a distinct resource and action: listing runs, reading a single run, generating a URL, listing children, and listing projects. There is no ambiguity or overlap between them.
All tools share a consistent 'ls_' prefix, but the verbs mix 'list', 'read', and 'get', creating a slight inconsistency. The pattern is still readable and predictable, but not as uniform as a pure verb_noun convention.
Five tools is a well-scoped set for exploring LangSmith runs and projects. Each tool serves a specific purpose without redundancy or bloat.
The set covers all essential read-only workflows for runs, children, and projects. Minor gaps exist, such as no direct project detail tool or search/filter beyond what's offered, but these are workarounds and not dead ends.