CTlogs.io MCP Server: Install & Setup

Install CTlogs.io in Claude Code

Claude Code

claude mcp add --transport http ctlogs-io https://mcp.ctlogs.io/mcp

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

{
  "mcpServers": {
    "ctlogs-io": {
      "url": "https://mcp.ctlogs.io/mcp"
    }
  }
}

Frequently asked questions

What does the CTlogs.io MCP server do?

Certificate Transparency search: subdomains, certificate history and hostname keyword search.

Is the CTlogs.io 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 CTlogs.io run locally or remotely?

Remote. Hosted by the provider. You connect with a URL, nothing to install.

How do I add CTlogs.io to Claude Code?

Run: claude mcp add --transport http ctlogs-io https://mcp.ctlogs.io/mcp

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