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LangSmith
Query LangSmith traces and datasets.
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About
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LangSmith is a Model Context Protocol server in the Analytics & Monitoring category. It lets AI assistants that speak MCP call its tools and read its resources over STDIO.
Example tools
Illustrative tool names — the actual tool set is defined by the server at runtime.
list_resources
Enumerate resources exposed by this MCP
get_resource
Fetch a resource by ID
invoke
Invoke the primary action of this MCP
Screenshots
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Frequently Asked Questions
Common questions about LangSmith.
- What is the LangSmith MCP server?
- The LangSmith MCP server enables agents to query LangSmith traces and datasets. It is categorized under Analytics & Monitoring and provided by the community.
- How do I configure LangSmith in an MCP client?
- Configuration typically involves installing the MCP server and providing the necessary API key within your client. Specific steps depend on the client application you are using, such as Claude Desktop or Cursor.
- Does the LangSmith MCP server require authentication?
- Yes, the LangSmith MCP server requires an API key for authentication. This key grants access to your LangSmith data and services.
- What capabilities does the LangSmith MCP offer?
- The LangSmith MCP provides access to LangSmith traces and datasets, allowing for observability and analysis of large language model (LLM) operations. It is tagged with langsmith, langchain, and observability.
- What are the costs associated with using the LangSmith MCP server?
- The LangSmith MCP server itself is provided by the community, implying no direct cost for the server software. However, costs may be incurred through your usage of the underlying LangSmith service, which depends on your LangSmith plan.
- Are there any known limitations or prerequisites for the LangSmith MCP?
- A primary prerequisite is an existing LangSmith account and a valid API key. The server exposes a 'stdio' transport, which may have implications for integration depending on your client's capabilities.
Install LangSmith
Claude Desktop
Add this to claude_desktop_config.json.
{
"mcpServers": {
"langsmith": {
"command": "npx",
"args": [
"-y",
"@modelcontextprotocol/server-langsmith"
]
}
}
}Cursor
Add this to ~/.cursor/mcp.json.
{
"mcpServers": {
"langsmith": {
"command": "npx",
"args": [
"-y",
"@modelcontextprotocol/server-langsmith"
]
}
}
}VS Code
Add this to your workspace settings.json.
{
"mcp.servers": {
"langsmith": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"@modelcontextprotocol/server-langsmith"
]
}
}
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