CertIndex

Verified Integration

Author: @wrapping•Category: ServerApplication

GitHub Repository

JSON-RPC 2.0

Protocol Standard

Sub-second

Execution Latency

Active

Operational Status

Client Configuration

— Connect CertIndex to Claude Desktop or Cursor in seconds

{
  "mcpServers": {
    "certindex": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-certindex"
      ],
      "env": {}
    }
  }
}

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows).

Architecture & Capabilities

System Overview

Provides AI assistants with access to Certificate Transparency search tools by wrapping the public CertIndex REST API.

Indexed Date

7/21/2026

License

Open Source

Protocol Layer

stdio / SSE RPC

Frequently Asked Questions

Architecture and operational details for CertIndex

You can search for TLS certificates issued for specific domains, discover subdomains, find certificates expiring soon, and retrieve full PEM certificates and CT log metadata using SHA-256 fingerprints.

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