Searxng Http Mcp

中文 · Quick Start · Features · Architecture · Comparison · Usage · MCP Tools · Client Config · Plugin · Contributing

A self-contained MCP server that wraps SearXNG — a free, privacy-respecting metasearch engine that aggregates results from 200+ search engines.

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🚀 Quick Start

Server mode — deploy once, connect from any client:

docker run -d --name searxng-mcp --restart unless-stopped \
  -p YOUR_PORT:8888 --memory=512m --cpus=1 \
  ghcr.io/whw23/searxng-http-mcp:latest

Then [connect your client](#-client-configuration) to http://YOUR_HOST:YOUR_PORT/mcp/. To enable API key auth, see [Authentication](#-authentication).

Local mode — no server needed, run directly in your client:

docker run --rm -i --memory=512m --cpus=1 ghcr.io/whw23/searxng-http-mcp:latest --stdio

Add this as a stdio MCP server in your client — see [Client Configuration](#-client-configuration) for details.

uvx mode — if you already have SearXNG running (install guide):

uvx searxng-http-mcp

Set SEARXNG_URL to point to your SearXNG instance (default: http://127.0.0.1:8080).

✨ Features

Search

• 🔍 200+ search engines — Google, Bing, DuckDuckGo, Brave, and more via SearXNG
• 📂 30+ categories — news, images, videos, science, IT, and more
• 📄 Multi-page fanout — up to 5 pages per call
• 💡 Autocomplete suggestions — discover relevant search terms
• 🗂 Engine discovery — query available engines grouped by category
• 🎯 Token-efficient — results trimmed to essentials

Infrastructure

• 📦 Self-contained — SearXNG built into Docker image
• 🔄 Triple transport — HTTP server, Docker stdio, and uvx standalone
• 🔐 Authentication — x-api-key + HTTP Basic Auth
• 🌐 Reverse proxy — SearXNG Web UI on the same port
• ⚡ Dynamic tool descriptions — live category lists injected at startup
• 📐 Rich JSON Schema — enum constraints, range limits, and descriptions on every parameter

🏛 Architecture

graph LR
  Client(["client:YOUR_PORT"]) --> Expose(":8888")

  subgraph Container["🐳 Docker Container"]
    direction LR
    Expose --> Auth{Auth}
    Auth -->|/mcp| MCP[FastMCP Server]
    Auth -->|/*| Proxy[Reverse Proxy]
    MCP --> SearXNG[SearXNG :8080]
    Proxy --> SearXNG
  end

  style Expose fill:none,stroke:#2496ed,stroke-dasharray:5 5,color:#2496ed

  style Client fill:#4a90d9,color:#fff,stroke:#3a7bc8
  style Container fill:#f0f4f8,stroke:#2496ed,stroke-width:2px,color:#2496ed
  style Auth fill:#f5a623,color:#fff,stroke:#d4900e
  style MCP fill:#50c878,color:#fff,stroke:#3da85e
  style Proxy fill:#9b59b6,color:#fff,stroke:#8344a5
  style SearXNG fill:#e74c3c,color:#fff,stroke:#c0392b

📊 Comparison with Alternatives

Why these five?

There are 20+ SearXNG MCP servers and many more general-purpose search MCPs. Most SearXNG wrappers only expose a basic search tool, leaving SearXNG's categories, autocomplete, and engine metadata unused. We picked five alternatives that each represent a distinct category:

• 88plug/searxng-mcp — richest tool surface among SearXNG MCPs (7 tools: rendered fetch, research mode, parallel queries)
• ihor/mcp-searxng — most GitHub stars among SearXNG MCPs
• open-webSearch — top free multi-engine alternative outside the SearXNG ecosystem (Bing, Baidu, DuckDuckGo, Brave, etc.)
• exa-mcp-server — most popular commercial search API MCP
• Perplexity MCP — commercial AI-powered search, highest star count in the search MCP space

Feature ✨ This project 88plug/searxng-mcp ihor/mcp-searxng open-webSearch exa-mcp-server Perplexity MCP

Search 200+ engines via SearXNG✅✅✅❌❌❌ 30+ search categories✅❌❌❌❌❌ Multi-page fanout✅❌❌❌❌❌ Autocomplete suggestions✅❌❌❌❌❌ Engine discovery tool✅❌❌❌❌❌ Dynamic tool descriptions✅❌❌❌❌❌ Infrastructure Self-contained (built-in search)✅❌❌✅N/AN/A Zero-install Docker deploy✅❌❌✅❌❌ HTTP + stdio transport✅✅✅✅✅✅ Authentication✅❌❌❌✅✅ Web UI reverse proxy✅❌❌❌❌❌ AI Coding Agent Plugin✅❌❌❌❌✅ General Free & open source✅✅✅✅❌ (paid API)❌ (paid API) Privacy (self-hosted)✅✅✅✅❌❌ LanguagePythonPythonNode.jsTypeScriptTypeScriptTypeScript GitHub Stars

Why fewer tools?

MCP is designed for composition — clients connect multiple specialized servers, each doing one thing well. Some alternatives bundle URL fetching, rendered page extraction, multi-query fan-out, or research modes into the search server. We keep the tool surface to three (search, autocomplete, engine discovery) by design:

• URL fetching is a separate concern. MCP clients already ship dedicated tools (WebFetch, Playwright MCP, Jina Reader). Bundling fetch into a search server mixes responsibilities and duplicates the client ecosystem.
• Multi-query parallel search is client-side orchestration. LLM clients can fire multiple search calls in parallel — a search_many tool only adds token overhead for tool selection with no real benefit.
• Research / synthesis belongs in the LLM layer. The model is the best synthesizer. Pushing multi-step research logic into the MCP server couples application concerns to infrastructure.

Instead we invest in what the alternatives above lack: complete SearXNG API coverage (categories, autocomplete, engine metadata — capabilities most wrappers leave on the table), self-contained deployment, authentication, Web UI reverse proxy, and AI coding agent plugin integration (Claude Code / Copilot CLI / Codex CLI).

📖 Usage

🌐 HTTP Mode (default)

# Without authentication
docker run -d --name searxng-mcp --restart unless-stopped \
  -p YOUR_PORT:8888 --memory=512m --cpus=1 \
  ghcr.io/whw23/searxng-http-mcp:latest

# With authentication
docker run -d --name searxng-mcp --restart unless-stopped \
  -p YOUR_PORT:8888 --memory=512m --cpus=1 \
  -e API_KEY=your-secret-key \
  ghcr.io/whw23/searxng-http-mcp:latest

🔗 MCP Endpointhttp://YOURHOST:YOURPORT/mcp/ 🖥 SearXNG Web UIhttp://YOURHOST:YOURPORT/

📡 stdio Mode

docker run --rm -i --memory=512m --cpus=1 \
  ghcr.io/whw23/searxng-http-mcp:latest --stdio

No ports exposed. Communication via stdin/stdout. SearXNG runs internally for the MCP tools.

🐍 uvx Mode

# Connect to a local SearXNG instance (default: http://127.0.0.1:8080)
uvx searxng-http-mcp

# Connect to a remote SearXNG instance
SEARXNG_URL=http://YOUR_SEARXNG_HOST:YOUR_SEARXNG_PORT uvx searxng-http-mcp

Requires Python 3.14+ and an existing SearXNG instance. No Docker needed.

⚙️ Environment Variables

VariableDefaultDescription

APIKEY(empty, no auth)API key for authentication SEARXNGURLhttp://127.0.0.1:8080SearXNG instance URL (for uvx/standalone mode)

🔐 Authentication

When API_KEY is set, all requests require one of:

• x-api-key header — for MCP clients: x-api-key: your-key
• HTTP Basic Auth — for browsers

> [!TIP] > Browser Login: When accessing the Web UI with API_KEY enabled, the browser will show a login dialog. Leave the username empty and enter your API key as the password. > >

When API_KEY is not set, all requests are open.

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🔧 MCP Tools Reference

🔍 search — Search the web using SearXNG

Aggregates results from 200+ search engines with privacy.

ParameterTypeRequiredDefaultDescription

querystringyes—The search query to use categoriesstringno""Comma-separated category names (e.g., general,news,science) enginesstringno""Comma-separated engine names (e.g., google,arxiv,wikipedia) languagestringno""Search language code (e.g., en, zh, ja) timerangeenumnonullday, week, month, year safesearchenumno00=off, 1=moderate, 2=strict pagenoint ≥1no1Starting page number pagesint 1–5no1Number of pages to fetch in parallel maxresultsint 1–100no10Maximum number of results to return formatenumnocompactcompact (title/url/content) or full (+ engines/score/category/date)

Returns: results, answers, suggestions, corrections, infoboxes.

💡 autocomplete — Get search query suggestions

ParameterTypeRequiredDescription

querystringyesPartial query string to get suggestions for

🗂 engine_info — Discover available engines and categories

No parameters. Returns the list of enabled engines grouped by category.

Returns:

{
  "categories": ["general", "images", "videos", "news", ...],
  "engines": ["google", "bing", "duckduckgo", ...],
  "category_engines": {
    "general": ["google", "bing", "duckduckgo", "brave", ...],
    "science": ["arxiv", "google scholar", "pubmed", ...],
    ...
  }
}

Use this to discover what engines are available before calling search with specific engines or categories filters.

---

🔌 Client Configuration

Claude Desktop

Server mode — edit ~/Library/Application Support/Claude/claude_desktop_config.json:

{
  "mcpServers": {
    "searxng": {
      "url": "http://YOUR_HOST:YOUR_PORT/mcp/",
      "headers": {
        "x-api-key": "your-secret-key"
      }
    }
  }
}

Local mode:

{
  "mcpServers": {
    "searxng": {
      "command": "docker",
      "args": ["run", "--rm", "-i", "--memory=512m", "--cpus=1", "ghcr.io/whw23/searxng-http-mcp:latest", "--stdio"]
    }
  }
}

uvx mode:

{
  "mcpServers": {
    "searxng": {
      "command": "uvx",
      "args": ["searxng-http-mcp"],
      "env": { "SEARXNG_URL": "http://YOUR_SEARXNG_HOST:YOUR_SEARXNG_PORT" }
    }
  }
}

Claude Code

Server mode:

claude mcp add --transport http --header "x-api-key: your-secret-key" searxng http://YOUR_HOST:YOUR_PORT/mcp/

Local mode:

claude mcp add --transport stdio searxng -- docker run --rm -i --memory=512m --cpus=1 ghcr.io/whw23/searxng-http-mcp:latest --stdio

uvx mode:

claude mcp add --transport stdio searxng -- uvx searxng-http-mcp

Codex

Server mode — add to ~/.codex/config.toml:

[mcp_servers.searxng]
url = "http://YOUR_HOST:YOUR_PORT/mcp/"
http_headers = { "x-api-key" = "your-secret-key" }

Local mode:

[mcp_servers.searxng]
command = "docker"
args = ["run", "--rm", "-i", "--memory=512m", "--cpus=1", "ghcr.io/whw23/searxng-http-mcp:latest", "--stdio"]

uvx mode:

[mcp_servers.searxng]
command = "uvx"
args = ["searxng-http-mcp"]

Cursor

Server mode — edit .cursor/mcp.json:

{
  "mcpServers": {
    "searxng": {
      "url": "http://YOUR_HOST:YOUR_PORT/mcp/",
      "headers": {
        "x-api-key": "your-secret-key"
      }
    }
  }
}

Local mode:

{
  "mcpServers": {
    "searxng": {
      "command": "docker",
      "args": ["run", "--rm", "-i", "--memory=512m", "--cpus=1", "ghcr.io/whw23/searxng-http-mcp:latest", "--stdio"]
    }
  }
}

uvx mode:

{
  "mcpServers": {
    "searxng": {
      "command": "uvx",
      "args": ["searxng-http-mcp"],
      "env": { "SEARXNG_URL": "http://YOUR_SEARXNG_HOST:YOUR_SEARXNG_PORT" }
    }
  }
}

VS Code Copilot

Server mode — add to .vscode/mcp.json:

{
  "servers": {
    "searxng": {
      "type": "http",
      "url": "http://YOUR_HOST:YOUR_PORT/mcp/",
      "headers": {
        "x-api-key": "your-secret-key"
      }
    }
  }
}

Local mode:

{
  "servers": {
    "searxng": {
      "type": "stdio",
      "command": "docker",
      "args": ["run", "--rm", "-i", "--memory=512m", "--cpus=1", "ghcr.io/whw23/searxng-http-mcp:latest", "--stdio"]
    }
  }
}

uvx mode:

{
  "servers": {
    "searxng": {
      "type": "stdio",
      "command": "uvx",
      "args": ["searxng-http-mcp"],
      "env": { "SEARXNG_URL": "http://YOUR_SEARXNG_HOST:YOUR_SEARXNG_PORT" }
    }
  }
}

Windsurf

Server mode — add to ~/.codeium/windsurf/mcp_config.json:

{
  "mcpServers": {
    "searxng": {
      "serverUrl": "http://YOUR_HOST:YOUR_PORT/mcp/",
      "headers": {
        "x-api-key": "your-secret-key"
      }
    }
  }
}

Local mode:

{
  "mcpServers": {
    "searxng": {
      "command": "docker",
      "args": ["run", "--rm", "-i", "--memory=512m", "--cpus=1", "ghcr.io/whw23/searxng-http-mcp:latest", "--stdio"]
    }
  }
}

uvx mode:

{
  "mcpServers": {
    "searxng": {
      "command": "uvx",
      "args": ["searxng-http-mcp"],
      "env": { "SEARXNG_URL": "http://YOUR_SEARXNG_HOST:YOUR_SEARXNG_PORT" }
    }
  }
}

Cline

Configure via Cline's MCP settings panel in VS Code (Cline > MCP Servers > Add).

Server mode:

{
  "mcpServers": {
    "searxng": {
      "url": "http://YOUR_HOST:YOUR_PORT/mcp/",
      "headers": {
        "x-api-key": "your-secret-key"
      }
    }
  }
}

Local mode:

{
  "mcpServers": {
    "searxng": {
      "command": "docker",
      "args": ["run", "--rm", "-i", "--memory=512m", "--cpus=1", "ghcr.io/whw23/searxng-http-mcp:latest", "--stdio"]
    }
  }
}

uvx mode:

{
  "mcpServers": {
    "searxng": {
      "command": "uvx",
      "args": ["searxng-http-mcp"],
      "env": { "SEARXNG_URL": "http://YOUR_SEARXNG_HOST:YOUR_SEARXNG_PORT" }
    }
  }
}

OpenCode

Server mode — edit opencode.json:

{
  "mcp": {
    "searxng": {
      "type": "remote",
      "url": "http://YOUR_HOST:YOUR_PORT/mcp/",
      "headers": {
        "x-api-key": "your-secret-key"
      }
    }
  }
}

Local mode:

{
  "mcp": {
    "searxng": {
      "type": "local",
      "command": ["docker", "run", "--rm", "-i", "--memory=512m", "--cpus=1", "ghcr.io/whw23/searxng-http-mcp:latest", "--stdio"]
    }
  }
}

uvx mode:

{
  "mcp": {
    "searxng": {
      "type": "local",
      "command": ["uvx", "searxng-http-mcp"]
    }
  }
}

Hermes Agent

Server mode — edit ~/.hermes/config.yaml:

mcp_servers:
  searxng:
    url: "http://YOUR_HOST:YOUR_PORT/mcp/"
    headers:
      x-api-key: "your-secret-key"

Local mode:

mcp_servers:
  searxng:
    command: "docker"
    args: ["run", "--rm", "-i", "--memory=512m", "--cpus=1", "ghcr.io/whw23/searxng-http-mcp:latest", "--stdio"]

uvx mode:

mcp_servers:
  searxng:
    command: "uvx"
    args: ["searxng-http-mcp"]

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🧩 AI Coding Agent Plugin

Compatible with Claude Code, GitHub Copilot CLI, and OpenAI Codex CLI. Add the marketplace, then install the plugin that fits your setup:

/plugin marketplace add whw23/searxng_http_mcp

All plugins include:

• 🔍 /web-search-via-searxng skill — search the web with category selection guide and usage rules
• 🤖 web-searcher agent — research subagent with:
• 🌐 Multi-language parallel search — auto-detects query language, searches in multiple languages for broader coverage
• 🛡 Source credibility tiers — Tier 1/2/3 classification with AI poisoning defense
• ✅ Cross-validation — key facts require 2+ independent sources
• 🔍 WebFetch deep reading — reads full pages from credible sources, not just snippets
• 🔄 Multi-round iterative search — up to 3 rounds with automatic deepening on gaps
• ⏱ Timeliness evaluation — flags outdated content, states source date ranges
• 📝 Footnote-style references — structured output with inline source citations

🐍 Standalone mode

…

Source & license

This open-source MCP server is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: whw23
• Source: whw23/searxnghttp_mcp
• License: MIT

Install and usage instructions live in the source repository linked above.