Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
/plugin marketplace add langchain-ai/langchain-pluginsnpx agentmods add plugins/langchain-ai/langchain-plugins/marketplacegit clone --depth 1 https://github.com/langchain-ai/langchain-pluginsGrade A, and why
langchain-plugins marketplace scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 3d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
{
"$schema": "https://json.schemastore.org/claude-code-marketplace.json",
"name": "langchain-plugins",
"owner": {
"name": "LangChain",
"email": "[email protected]"
},
"description": "LangChain ecosystem plugins for deepagents-code (dcode), Claude Code, and OpenAI Codex.",
"plugins": [
{
"name": "langchain-skills",
"source": {
"source": "url",
"url": "https://github.com/langchain-ai/langchain-skills.git",
"ref": "main"
},
"description": "Agent skills for building with LangChain, LangGraph, and Deep Agents (mirrored from langchain-ai/langchain-skills).",
"author": { "name": "LangChain" }
},
{
"name": "langsmith-skills",
"source": {
"source": "url",
"url": "https://github.com/langchain-ai/langsmith-skills.git",
"ref": "main"
},
"description": "Agent skills for tracing, datasets, and evaluation with LangSmith (mirrored from langchain-ai/langsmith-skills).",
"author": { "name": "LangChain" }
},
{
"name": "langchain-mcp",
"source": "./plugins/langchain-mcp",
"description": "LangChain Docs and Reference MCP servers for live documentation and API lookups.",
"author": { "name": "LangChain" }
},
{
"name": "langsmith-mcp",
"source": "./plugins/langsmith-mcp",
"description": "LangSmith remote MCP server (OAuth) for querying traces, datasets, prompts, and experiments.",
"author": { "name": "LangChain" }
}
]
}
The plugins it lists here
This marketplace lists 1 plugin kept in the same repository. Each has its own page, its own measurements and its own install command.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 3d ago First seen · 44 lines scan A 810f9f8b2629
langchain-plugins marketplace is a plugin published in the GitHub repository langchain-ai/langchain-plugins (7 stars, last pushed 1mo ago), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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