SearXNG MCP Server

An MCP server implementation that integrates the SearXNG API, providing web search capabilities.

Features

• Web Search: General queries, news, articles, with pagination.

• URL Content Reading: Advanced content extraction with pagination, section filtering, and heading extraction.

• Intelligent Caching: URL content is cached with TTL (Time-To-Live) to improve performance and reduce redundant requests.

• Pagination: Control which page of results to retrieve.

• Time Filtering: Filter results by time range (day, month, year).

• Language Selection: Filter results by preferred language.

• Safe Search: Control content filtering level for search results.

Related MCP server: SerpApi MCP Server

Tools

• searxng_web_search

  • Execute web searches with pagination

  • Inputs:

    • query (string): The search query. This string is passed to external search services.

    • pageno (number, optional): Search page number, starts at 1 (default 1)

    • time_range (string, optional): Filter results by time range - one of: "day", "month", "year" (default: none)

    • language (string, optional): Language code for results (e.g., "en", "fr", "de") or "all" (default: "all")

    • safesearch (number, optional): Safe search filter level (0: None, 1: Moderate, 2: Strict) (default: instance setting)

• web_url_read

  • Read and convert the content from a URL to markdown with advanced content extraction options

  • Inputs:

    • url (string): The URL to fetch and process

    • startChar (number, optional): Starting character position for content extraction (default: 0)

    • maxLength (number, optional): Maximum number of characters to return

    • section (string, optional): Extract content under a specific heading (searches for heading text)

    • paragraphRange (string, optional): Return specific paragraph ranges (e.g., '1-5', '3', '10-')

    • readHeadings (boolean, optional): Return only a list of headings instead of full content

Configuration

Environment Variables

Required

• SEARXNG_URL: SearXNG instance URL (default: http://localhost:8080)

  • Format: <protocol>://<hostname>[:<port>]

  • Example: https://search.example.com

Optional

• AUTH_USERNAME / AUTH_PASSWORD: HTTP Basic Auth credentials for password-protected instances

• USER_AGENT: Custom User-Agent header (e.g., MyBot/1.0)

• HTTP_PROXY / HTTPS_PROXY: Proxy URLs for routing traffic

  • Format: http://[username:password@]proxy.host:port

• NO_PROXY: Comma-separated bypass list (e.g., localhost,.internal,example.com)

Installation & Configuration

NPX

Note: Mix and match environment variables as needed. All optional variables can be used independently or together.

NPM

Docker

Using Pre-built Image from Docker Hub

Note: Add only the -e flags and env variables you need.

Build Locally

Use the same configuration as above, replacing isokoliuk/mcp-searxng:latest with mcp-searxng:latest.

Docker Compose

Create a docker-compose.yml file:

Then configure your MCP client:

HTTP Transport (Optional)

The server supports both STDIO (default) and HTTP transports. Set MCP_HTTP_PORT to enable HTTP mode.

HTTP Endpoints:

• MCP Protocol: POST/GET/DELETE /mcp

• Health Check: GET /health

Testing:

Running evals

For Developers

Contributing

We welcome contributions! Follow these guidelines:

Coding Standards:

• Use TypeScript with strict type safety

• Follow existing error handling patterns

• Write concise, informative error messages

• Include unit tests for new functionality

• Maintain 90%+ test coverage

• Test with MCP inspector before submitting

• Run evals to verify functionality

Workflow:

1. Fork and clone:

   git clone https://github.com/YOUR_USERNAME/mcp-searxng.git cd mcp-searxng git remote add upstream https://github.com/ihor-sokoliuk/mcp-searxng.git

2. Setup:

   npm install npm run watch # Development mode with file watching

3. Development:

   git checkout -b feature/your-feature-name # Make changes in src/ npm run build npm test npm run test:coverage npm run inspector

4. Submit:

   git commit -m "feat: description" git push origin feature/your-feature-name # Create PR on GitHub

Testing

Coverage: 100% success rate with comprehensive unit tests covering error handling, types, proxy configs, resources, and logging.

License

This MCP server is licensed under the MIT License. This means you are free to use, modify, and distribute the software, subject to the terms and conditions of the MIT License. For more details, please see the LICENSE file in the project repository.