B+

npm:langchain-mcp

https://www.npmjs.com/package/langchain-mcp
88/100 · MCP Trust Grade · checked 3h ago · MCP 2.0.1

What it offers — 9 tools · Developer Tools

search_docs

Search documentation, references, and tutorials about LangChain, LangGraph, LangSmith, and DeepAgents.

search_langchain_code

Search LangChain source code. Returns relevant code snippets.

search_langgraph_code

Search LangGraph source code. Returns relevant code snippets.

search_deepagents_code

Search DeepAgents source code. Returns relevant code snippets.

langgraph_list_threads

List conversation threads from a local LangGraph dev server. Use this to find threads to debug. Requires a running LangGraph server (langgraph dev).

langgraph_get_thread

Get detailed information about a specific thread including its current values and metadata.

langgraph_get_thread_state

Get the current state/checkpoint of a thread, including state values, pending tasks, and next nodes.

langgraph_list_runs

List runs (executions) for a specific thread. Use this to find specific runs to inspect.

langgraph_get_run

Get detailed trace information for a specific run, including input, output, and execution details.

Spec / packaging20%100
Security (OWASP MCP)30%90
Maintenance / popularity20%83
Tool hygiene15%70
Transparency / provenance15%90

Findings

INFO Static analysis of npm package langchain-mcp@2.0.1 (stdio server — no remote endpoint). Reliability/behavioral signals require running it; not measured.
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We re-grade npm:langchain-mcp on a schedule and alert your Slack/webhook the moment its tools change or its grade drops — rug-pull insurance for the connection.

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MCP Trust report card — npm:langchain-mcp grade B+
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A live badge — it re-verifies itself and shows current stability. Static scorecards can't. Paste it in your README or site to show users you're independently audited.

MCP Trust Grade B+ · wmcp.sh
[![MCP Trust Grade B+](https://wmcp.sh/mcp/grade/npm%3Alangchain-mcp/badge.svg)](https://wmcp.sh/mcp/grade/npm%3Alangchain-mcp)
<a href="https://wmcp.sh/mcp/grade/npm%3Alangchain-mcp"><img src="https://wmcp.sh/mcp/grade/npm%3Alangchain-mcp/badge.svg" alt="MCP Trust Grade B+ · wmcp.sh"></a>

Agents: check this before connecting

Add the wmcp.sh trust oracle as an MCP server and call grade_mcp_server / check_mcp_drift in your agent's pre-connection gate:

https://wmcp.sh/mcp/trust
How this grade is computed. An open, independent rubric — Spec conformance (20%), Security mapped to the OWASP MCP Top 10 (30%), Reliability (20%), Tool hygiene (15%), Transparency (15%) — run by connecting to the server and inspecting its real MCP surface. The grade is free and identical whether or not the operator pays. v1 uses static + spec signals from a single connection; continuous uptime, real latency, and annotation-truthing (declared readOnly vs observed behavior) layer on via the wmcp.sh proxy.