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CertIndex MCP

CertIndex MCP is a hosted server that exposes Certificate Transparency search tools to AI agents. It allows agents to enumerate currently-valid TLS certificates, monitor new issuance, and stream live firehose data without writing custom wrappers. It maps 10 tools 1:1 to the REST API, supporting subdomain enumeration, certificate lookup, and expiry monitoring for security and development workflows.

Visit CertIndex

Package and access

Local package with source-attributed installation metadata. Koskamo does not execute packages during review.

CertIndex MCP logo, by CertIndexCommunity listingLocal stdioSource reviewed; not executedPublished by CertIndex
You need:Create your account Sign up at ctindex.io/app/signup with email + password or "Continue with Google".pip install certindex-mcp
Vendor documentation

What you can do with it

  • Enumerate subdomains with active certificates
  • Monitor domains for rogue certificate issuance
  • Search for certificates by domain or issuer
  • Stream newly indexed certificates via firehose

Source and maintenance

Community listingRegistry 0.2.0MIT
mcp-registry: io.github.certindex/certindex-mcp@0.2.0Source repositoryProject website
Last repository push
Maintenance checked

Packages and installation

Source-provided package data. Koskamo has not executed or live-probed this package.

certindex-mcp 0.2.0

pypi
certindex-mcp package definition
{
  "version": "0.2.0",
  "transport": "stdio",
  "identifier": "certindex-mcp",
  "registryType": "pypi",
  "registryBaseUrl": "https://pypi.org",
  "environmentVariables": [
    {
      "name": "CERTINDEX_API_KEY",
      "isRequired": true,
      "description": "CertIndex API key (free tier at https://ctindex.io)"
    }
  ]
}

Tools

Reported by the attributed source; not independently observed by Koskamo.

No tool definitions available.

Maintenance history

Public check and source-refresh events. Editorial and ownership records remain private.

  • · repository · passed · metadata changed · updated
  • · backfill · recorded · Pre-expansion baseline; unobserved rich metadata remains unknown

Connect from your client

Each snippet configures the same source-provided package; replace placeholders before use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Cursor

Merge this local stdio configuration, replace every placeholder environment value, and restart Cursor. Koskamo has not executed this package.
Cursor configuration
{
  "mcpServers": {
    "certindex-mcp": {
      "command": "uvx",
      "args": [
        "certindex-mcp==0.2.0"
      ],
      "env": {
        "CERTINDEX_API_KEY": "<YOUR_CERTINDEX_API_KEY>"
      }
    }
  }
}

Cline

Merge this local stdio configuration, replace every placeholder environment value, and restart Cline. Koskamo has not executed this package.
Cline configuration
{
  "mcpServers": {
    "certindex-mcp": {
      "command": "uvx",
      "args": [
        "certindex-mcp==0.2.0"
      ],
      "env": {
        "CERTINDEX_API_KEY": "<YOUR_CERTINDEX_API_KEY>"
      }
    }
  }
}

VS Code

Merge this local stdio configuration, replace every placeholder environment value, and restart VS Code. Koskamo has not executed this package.
VS Code configuration
{
  "servers": {
    "certindex-mcp": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "certindex-mcp==0.2.0"
      ],
      "env": {
        "CERTINDEX_API_KEY": "<YOUR_CERTINDEX_API_KEY>"
      }
    }
  }
}

Claude Desktop

Merge this local stdio configuration, replace every placeholder environment value, and restart Claude Desktop. Koskamo has not executed this package.
Claude Desktop configuration
{
  "mcpServers": {
    "certindex-mcp": {
      "command": "uvx",
      "args": [
        "certindex-mcp==0.2.0"
      ],
      "env": {
        "CERTINDEX_API_KEY": "<YOUR_CERTINDEX_API_KEY>"
      }
    }
  }
}

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