Certindex MCP Server: Install & Setup

Install Certindex in Claude Code

Claude Code

claude mcp add certindex -e CERTINDEX_API_KEY=... -- uvx certindex-mcp

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

{
  "mcpServers": {
    "certindex": {
      "command": "uvx",
      "args": [
        "certindex-mcp"
      ],
      "env": {
        "CERTINDEX_API_KEY": "..."
      }
    }
  }
}

Replace each ... with your own value.

Frequently asked questions

What does the Certindex MCP server do?

Certificate Transparency search for AI agents: certs, subdomains, issuance history, expiry.

Is the Certindex MCP server free?

The server is free, but you will likely need an account. The server itself is free, but it connects to a service that needs an account or API key, which may have paid tiers. Check the provider for current pricing.

Does Certindex run locally or remotely?

Local. Runs on your machine (stdio). You install it with npx, uvx, Docker or from source.

How do I add Certindex to Claude Code?

Run: claude mcp add certindex -e CERTINDEX_API_KEY=... -- uvx certindex-mcp

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