# certindex-mcp

> certindex-mcp — certindex-certindex-mcp. Use this tool when you need to query Certificate Transparency logs for TLS certificates, subdomains, and certificate metadata. It solves problems related to certificate discovery, subdomain enumeration, and metadata analysis by providing a searchable interface to CertIndex API. The tool takes query inputs and returns relevant certificate data, making it ideal for use cases involving certificate verification, security research, and domain analysis.

Canonical page: https://skillsregistry.net/skills/certindex-certindex-mcp  
JSON: https://api.skillsregistry.net/v1/skills/certindex-certindex-mcp

## Description

Enables LLMs to query Certificate Transparency logs via CertIndex API, allowing searches for TLS certificates, subdomains, and certificate metadata.

## Trust

- **Trust score (0–1):** 0.69
- **Verification tier:** scanned
- **Last scanned:** 2026-09-03

## Facts

- **Version:** 1.0.0
- **Skill type:** atomic
- **Execution layer:** mcp-remote
- **Runtime environment:** api
- **Category:** ai-ml
- **Updated:** 2026-09-03

## Source

- **Source listing:** [Glama](https://glama.ai/mcp/servers/lhx7gbm3g5)
- **Repository:** <https://github.com/certindex/certindex-mcp>

## Use it

Resolve this record through the SkillsRegistry MCP server (no auth, read-only):

```
claude mcp add --transport http --scope user skillsregistry https://api.skillsregistry.net/mcp
```

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_skill",
    "arguments": {
      "slug": "certindex-certindex-mcp"
    }
  }
}
```

REST: `GET https://api.skillsregistry.net/v1/skills/certindex-certindex-mcp` · pull for local use: `GET https://api.skillsregistry.net/v1/skills/certindex-certindex-mcp/pull`

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SkillsRegistry indexes agent skills from public registries and GitHub. Skills we have analysed are scanned with Circle-IR and scored on six dimensions; each listing states its scan coverage. More: https://skillsregistry.net/llms.txt