# crtsh-mcp

> crtsh-mcp — dthen-crtsh-mcp. Use this tool when you need to search and retrieve SSL/TLS certificate details, enumerate subdomains, or query certificate transparency logs without requiring an API key. It solves problems related to certificate verification, subdomain discovery, and security research by providing easy access to certificate data via crt.sh. The tool accepts search queries as input and returns detailed certificate information as output.

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

## Description

Enables certificate transparency log search via crt.sh, allowing users to query SSL/TLS certificates, enumerate subdomains, and retrieve certificate details with no API key required.

## Trust

- **Trust score (0–1):** 0.70
- **Verification tier:** verified
- **Last scanned:** 2026-08-29

## Facts

- **Version:** 1.0.0
- **Skill type:** atomic
- **Execution layer:** mcp-remote
- **Runtime environment:** api
- **Category:** search
- **Updated:** 2026-08-29

## Source

- **Source listing:** [Glama](https://glama.ai/mcp/servers/sdqgchtfmr)
- **Repository:** <https://github.com/Dthen/crtsh-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": "dthen-crtsh-mcp"
    }
  }
}
```

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