Langsmith Mcp Server Js

Fetch prompts from LangSmith with optional filtering. Args: is_public (str): Filter by prompt visibility - "true" for public prompts, "false" for private prompts (default: "false") limit (int): Maximum number of prompts to return (default: 20) Returns: Dict with prompts and metadata

Get a specific prompt by its exact name. Args: prompt_name (str): The exact name of the prompt to retrieve Returns: Dict containing the prompt details and template, or an error message

Call this tool when you need to understand how to create and push prompts to LangSmith. This is a documentation-only tool that explains how to: - Create prompts using LangChain's prompt templates - Push prompts to LangSmith for version control and management - Handle prompt creation vs. version updates Use the LangSmith Client's push_prompt() method. See LangSmith documentation for details.

Retrieve one page of message history for a specific conversation thread. Uses char-based pagination: pages are built by character budget (max_chars_per_page). Long strings are truncated to preview_chars. Supply page_number (1-based) on every call; use the returned total_pages to request further pages. Args: thread_id (str): The unique ID of the thread to fetch history for project_name (str): The name of the project containing the thread page_number (int): 1-based page index (required) max_chars_per_page (int): Max character count per page, capped at 30000 (default: 25000) preview_chars (int): Truncate long strings to this length (default: 150) Returns: Dict with result (list of messages), page_number, total_pages, etc.

Fetch LangSmith runs from one or more projects with flexible filters and automatic pagination. All results are paginated by character budget to keep responses manageable. Use page_number and total_pages from the response to iterate through multiple pages. Args: project_name (str): The project name. For multiple projects, use JSON array string. limit (int): Max runs to fetch from LangSmith API (capped at 100). These runs are then paginated by character budget into pages. page_number (int): 1-based page index. Use with total_pages from response to iterate through pages. trace_id (str, optional): Return only runs that belong to this trace. run_type (str, optional): Filter by type: "llm", "chain", "tool", "retriever". error (str, optional): "true" for errored runs, "false" for successful. is_root (str, optional): "true" for only top-level traces. filter (str, optional): Filter Query Language (FQL) expression. trace_filter (str, optional): Filter applied to the root run. tree_filter (str, optional): Filter applied to any run in the trace tree. order_by (str, optional): Sort field; prefix with "-" for descending. Default "-start_time". reference_example_id (str, optional): Filter runs by reference example ID. max_chars_per_page (int): Max chars per page, capped at 30000. Default 25000. preview_chars (int): Truncate long strings to this length. Default 150.