Deep Research MCP Server

The Deep Research MCP Server is a Model Context Protocol (MCP) compliant server designed to perform comprehensive web research. It leverages Tavily's powerful Search and new Crawl APIs to gather extensive, up-to-date information on a given topic. The server then aggregates this data along with documentation generation instructions into a structured JSON output, perfectly tailored for Large Language Models (LLMs) to create detailed and high-quality markdown documents.

Features

• Multi-Step Research: Combines Tavily's AI-powered web search with deep content crawling for thorough information gathering.
• Structured JSON Output: Provides well-organized data (original query, search summary, detailed findings per source, and documentation instructions) optimized for LLM consumption.
• Configurable Documentation Prompt: Includes a comprehensive default prompt for generating high-quality technical documentation. This prompt can be:
  • Overridden by setting the DOCUMENTATION_PROMPT environment variable.
  • Further overridden by passing a documentation_prompt argument directly to the tool.
• Configurable Output Path: Specify where research documents and images should be saved through:
  • Environment variable configuration
  • JSON configuration
  • Direct parameter in tool calls
• Granular Control: Offers a wide range of parameters to fine-tune both the search and crawl processes.
• MCP Compliant: Designed to integrate seamlessly into MCP-based AI agent ecosystems.

Prerequisites

• Node.js (version 18.x or later recommended)
• npm (comes with Node.js) or Yarn

Installation

Option 1: Using with NPX (Recommended for quick use)

You can run the server directly using npx without a global installation:

Option 2: Global Installation (Optional)

Then you can run it using:

Option 3: Local Project Integration or Development

1. Clone the repository (if you want to modify or contribute):
   git clone [https://github.com/your-username/deep-research-mcp.git](https://github.com/your-username/deep-research-mcp.git) cd deep-research-mcp
2. Install dependencies:
   npm install

Configuration

The server requires a Tavily API key and can optionally accept a custom documentation prompt.

1. Tavily API Key (Required)

Set the TAVILY_API_KEY environment variable to your Tavily API key.

Methods:

• .env file: Create a .env file in the project root (if running locally for development):
  TAVILY_API_KEY="tvly-YOUR_ACTUAL_API_KEY"
• Directly in command line:
  TAVILY_API_KEY="tvly-YOUR_ACTUAL_API_KEY" npx @pinkpixel/deep-research-mcp
• System Environment Variable: Set it in your operating system's environment variables.

2. Custom Documentation Prompt (Optional)

You can override the default comprehensive documentation prompt by setting the DOCUMENTATION_PROMPT environment variable.

Methods (in order of precedence):

1. Tool Argument: The documentation_prompt parameter passed when calling the deep-research-tool takes highest precedence
2. Environment Variable: If no parameter is provided in the tool call, the system checks for a DOCUMENTATION_PROMPT environment variable
3. Default Value: If neither of the above are set, the comprehensive built-in default prompt is used

Setting via .env file:

Or directly in command line:

3. Output Path Configuration (Optional)

You can specify where research documents and images should be saved. If not configured, a default path in the user's Documents folder with a timestamp will be used.

Methods (in order of precedence):

1. Tool Argument: The output_path parameter passed when calling the deep-research-tool takes highest precedence
2. Environment Variable: If no parameter is provided in the tool call, the system checks for a RESEARCH_OUTPUT_PATH environment variable
3. Default Path: If neither of the above are set, a timestamped subfolder in the user's Documents folder is used: ~/Documents/research/YYYY-MM-DDTHH-MM-SS/

Setting via .env file:

Or directly in command line:

Running the Server

• Development (with auto-reload): If you've cloned the repository and are in the project directory:
  npm run dev
  This uses nodemon and ts-node to watch for changes and restart the server.
• Production/Standalone: First, build the TypeScript code:
  npm run build
  Then, start the server:
  npm start
• With NPX or Global Install: (Ensure environment variables are set as described in Configuration)
  npx @pinkpixel/deep-research-mcp
  or if globally installed:
  deep-research-mcp

The server will listen for MCP requests on stdio.

How It Works

1. An LLM or AI agent makes a CallToolRequest to this MCP server, specifying the deep-research-tool and providing a query and other optional parameters.
2. The deep-research-tool first performs a Tavily Search to find relevant web sources.
3. It then uses Tavily Crawl to extract detailed content from each of these sources.
4. All gathered information (search snippets, crawled content, image URLs) is aggregated.
5. The chosen documentation prompt (default, ENV, or tool argument) is included.
6. The server returns a single JSON string containing all this structured data.
7. The calling LLM/agent uses this JSON output, guided by the documentation_instructions, to generate a comprehensive markdown document.

Using the deep-research-tool

This is the primary tool exposed by the server.

Output Structure

The tool returns a JSON string with the following structure:

Input Parameters

The deep-research-tool accepts the following parameters in its arguments object:

General Parameters

• query (string, required): The main research topic or question.
• documentation_prompt (string, optional): Custom prompt for LLM documentation generation.
  • Description: If provided, this prompt will be used by the LLM. It overrides both the DOCUMENTATION_PROMPT environment variable and the server's built-in default prompt. If not provided here, the server checks the environment variable, then falls back to the default.
• output_path (string, optional): Path where generated research documents and images should be saved.
  • Description: If provided, this path will be used for saving research outputs. It overrides the RESEARCH_OUTPUT_PATH environment variable. If neither is set, a timestamped folder in the user's Documents directory will be used.

Search Parameters (for Tavily Search API)

• search_depth (string, optional, default: "advanced"): Depth of the initial Tavily search.
  • Options: "basic", "advanced". Advanced search is tailored for more relevant sources.
• topic (string, optional, default: "general"): Category for the Tavily search.
  • Options: "general", "news".
• days (number, optional): For topic: "news", the number of days back from the current date to include search results.
• time_range (string, optional): Time range for search results (e.g., "d" for day, "w" for week, "m" for month, "y" for year).
• max_search_results (number, optional, default: 7): Maximum number of search results to retrieve and consider for crawling (1-20).
• chunks_per_source (number, optional, default: 3): For search_depth: "advanced", the number of content chunks to retrieve from each source (1-3).
• include_search_images (boolean, optional, default: false): Include a list of query-related image URLs from the initial search.
• include_search_image_descriptions (boolean, optional, default: false): Include image descriptions along with URLs from the initial search.
• include_answer (boolean or string, optional, default: false): Include an LLM-generated answer from Tavily based on search results.
  • Options: true (implies "basic"), false, "basic", "advanced".
• include_raw_content_search (boolean, optional, default: false): Include the cleaned and parsed HTML content of each initial search result.
• include_domains_search (array of strings, optional, default: []): A list of domains to specifically include in the search results.
• exclude_domains_search (array of strings, optional, default: []): A list of domains to specifically exclude from the search results.
• search_timeout (number, optional, default: 60): Timeout in seconds for Tavily search requests.

Crawl Parameters (for Tavily Crawl API - applied to each URL from search)

• crawl_max_depth (number, optional, default: 1): Max depth of the crawl from the base URL. 0 means only the base URL, 1 means the base URL and links found on it, etc.
• crawl_max_breadth (number, optional, default: 5): Max number of links to follow per level of the crawl tree (i.e., per page).
• crawl_limit (number, optional, default: 10): Total number of links the crawler will process starting from a single root URL before stopping.
• crawl_instructions (string, optional): Natural language instructions for the crawler for how to approach crawling the site.
• crawl_select_paths (array of strings, optional, default: []): Regex patterns to select only URLs with specific path patterns for crawling (e.g., "/docs/.*").
• crawl_select_domains (array of strings, optional, default: []): Regex patterns to restrict crawling to specific domains or subdomains (e.g., "^docs\\.example\\.com$"). If crawl_allow_external is false (default) and this is empty, crawling is focused on the domain of the URL being crawled. This overrides that focus.
• crawl_exclude_paths (array of strings, optional, default: []): Regex patterns to exclude URLs with specific path patterns from crawling.
• crawl_exclude_domains (array of strings, optional, default: []): Regex patterns to exclude specific domains or subdomains from crawling.
• crawl_allow_external (boolean, optional, default: false): Whether to allow the crawler to follow links to external domains.
• crawl_include_images (boolean, optional, default: true): Whether to extract image URLs from the crawled pages.
• crawl_categories (array of strings, optional, default: []): Filter URLs for crawling using predefined categories (e.g., "Blog", "Documentation", "Careers"). Refer to Tavily Crawl API for all options.
• crawl_extract_depth (string, optional, default: "advanced"): Depth of content extraction during crawl.
  • Options: "basic", "advanced". Advanced retrieves more data (tables, embedded content) but may have higher latency.
• crawl_timeout (number, optional, default: 180): Timeout in seconds for each Tavily Crawl request.

Understanding Documentation Prompt Precedence

The documentation_prompt is an essential part of this tool as it guides the LLM in how to format and structure the research findings. The system uses this precedence to determine which prompt to use:

1. If the LLM/agent provides a documentation_prompt parameter in the tool call:
   • This takes highest precedence and will be used regardless of other settings
   • This allows end users to customize documentation format through natural language requests to the LLM
2. If no parameter is provided in the tool call, but the DOCUMENTATION_PROMPT environment variable is set:
   • The environment variable value will be used
   • This is useful for system administrators or developers to set a consistent prompt across all tool calls
3. If neither of the above are set:
   • The comprehensive built-in default prompt is used
   • This default prompt is designed to produce high-quality technical documentation

This flexibility allows:

• End users to customize documentation through natural language requests to the LLM
• Developers to set system-wide defaults
• A fallback to well-designed defaults if no customization is provided

Working with Output Paths

The output_path parameter determines where research documents and images will be saved. This is especially important when the LLM needs to:

1. Save generated markdown documents
2. Download and save images from the research
3. Create supplementary files or resources

The system follows this precedence to determine the output path:

1. If the LLM/agent provides an output_path parameter in the tool call:
   • This takes highest precedence
   • Allows end users to specify a custom save location through natural language requests
2. If no parameter is provided, but the RESEARCH_OUTPUT_PATH environment variable is set:
   • The environment variable value will be used
   • Good for system-wide configuration
3. If neither of the above are set:
   • A default path with timestamp is used: ~/Documents/research/YYYY-MM-DDTHH-MM-SS/
   • This prevents overwriting previous research results

The LLM receives the final resolved output path in the tool's response JSON as the output_path field, so it always knows where to save generated content.

Note for LLMs: When processing the tool results, check the output_path field to determine where to save any files you generate. This path is guaranteed to be present in the response.

Instructions for the LLM

As an LLM using the output of the deep-research-tool, your primary goal is to generate a comprehensive, accurate, and well-structured markdown document that addresses the original_query.

Key Steps:

1. Parse the JSON Output: The tool will return a JSON string. Parse this to access its fields: documentation_instructions, original_query, search_summary, and research_data.
2. Adhere to documentation_instructions: This field contains the primary set of guidelines for creating the markdown document. It will either be the server's extensive default prompt (focused on high-quality technical documentation) or a custom prompt provided by the user. Follow these instructions meticulously regarding content quality, style, structure, markdown formatting, and handling of technical details.
3. Utilize research_data for Content:
   • The research_data array is your main source of information. Each object in this array represents a distinct web source.
   • For each source, pay attention to its title, original_url, and initial_content_snippet for context.
   • The core information for your document will come from the crawled_data array within each source. Specifically, the raw_content field of each crawled_data object contains the rich text extracted from that page.
   • Synthesize information across multiple sources in research_data to provide a comprehensive view. Do not just list content from one source after another.
   • If crawled_data[].images are present, you can mention them or list their URLs if appropriate and aligned with the documentation_instructions.
   • If crawl_errors are present for a source, it means that particular source might be incomplete. You can choose to note this subtly if it impacts coverage.
4. Address the original_query: The final document must comprehensively answer or address the original_query.
5. Leverage search_summary: If the search_summary field is present (from Tavily's include_answer feature), it can serve as a helpful starting point, an executive summary, or a way to frame the introduction. However, the main body of your document should be built from the more detailed research_data.
6. Synthesize, Don't Just Copy: Your role is not to dump the raw_content. You must process, understand, synthesize, rephrase, and organize the information from various sources into a coherent, well-written document that flows logically, as per the documentation_instructions.
7. Markdown Formatting: Strictly follow the markdown formatting guidelines provided in the documentation_instructions (headings, lists, code blocks, emphasis, links, etc.).
8. Handling Large Volumes: The research_data can be extensive. If you have limitations on processing large inputs, the system calling you might need to provide you with chunks of the research_data or make multiple requests to you to build the document section by section. The deep-research-tool itself will always attempt to return all collected data in one JSON output.
9. Technical Accuracy: Preserve all technical details, code examples, and important specifics from the source content, as mandated by the documentation_instructions. Do not oversimplify.
10. Visual Appeal (If Instructed): If the documentation_instructions include guidelines for visual appeal (like colored text or emojis using HTML), apply them judiciously.

Example LLM Invocation Thought Process:

Agent to LLM: "Okay, I've called the deep-research-tool with the query '<em>What are the latest advancements in quantum-resistant cryptography?</em>' and requested 5 sources with advanced crawling. Here's the JSON output: { ... (JSON output from the tool) ... }

Now, using the documentation_instructions provided within this JSON, and the research_data, please generate a comprehensive markdown document on 'The Latest Advancements in Quantum-Resistant Cryptography'. Ensure you follow all formatting and content guidelines from the instructions."

Example CallToolRequest (Conceptual Arguments)

An agent might make a call to the MCP server with arguments like this:

Troubleshooting

• API Key Errors: Ensure TAVILY_API_KEY is correctly set and valid.
• SDK Issues: Make sure @modelcontextprotocol/sdk and @tavily/core are installed and up-to-date.
• No Output/Errors: Check the server console logs for any error messages. Increase verbosity if needed for debugging.

Changelog

v0.1.2 (2024-05-10)

• Added configurable output path functionality
• Fixed type errors with latest Tavily SDK
• Added comprehensive documentation about output paths
• Added logo and improved documentation

v0.1.1

• Initial public release

Contributing

Contributions are welcome! Please feel free to submit issues, fork the repository, and create pull requests.

License

This project is licensed under the MIT License - see the LICENSE file for details.