mcp-citation-checker

> Built at The GEO Lab — where we measure what AI systems actually cite, not what SEO tools predict.

An MCP (Model Context Protocol) server for checking if domains are cited by AI platforms including Perplexity, ChatGPT, and Google AI Overview.

npm install -g mcp-citation-checker

git clone https://github.com/arturseo-geo/mcp-citation-checker.git
cd mcp-citation-checker
npm install

The server requires API credentials for three platforms. Set the following environment variables:

export PERPLEXITY_API_KEY="your_perplexity_api_key"

export OPENAI_API_KEY="your_openai_api_key"

export DATAFORSEO_LOGIN="your_dataforseo_username"
export DATAFORSEO_PASSWORD="your_dataforseo_password"

mcp-citation-checker

Or if running from source:

npm start

Check if a single domain is cited by AI platforms.

Input:

{
  "domain": "example.com"
}

Output:

{
  "domain": "example.com",
  "platforms": [
    {
      "platform": "perplexity",
      "domain": "example.com",
      "cited": true,
      "citationCount": 5,
      "citations": ["citation1", "citation2", ...]
    },
    {
      "platform": "chatgpt",
      "domain": "example.com",
      "cited": true
    },
    {
      "platform": "google_aio",
      "domain": "example.com",
      "cited": true,
      "resultCount": 3
    }
  ],
  "citedBy": ["perplexity", "chatgpt", "google_aio"],
  "citationRate": 1.0,
  "timestamp": "2026-03-26T10:30:00.000Z"
}

Check multiple domains for citations across all platforms.

Input:

{
  "domains": ["example.com", "another.com", "thirdsite.org"]
}

Output: `