# Entropy0

> Use this tool when you need to evaluate the trustworthiness of URLs and domains before accessing them, solving problems related to online security and threat detection. It integrates with AI agents via MCP, taking in URLs and domains as input and outputting trustworthiness scores based on signals like registration date and threat intelligence. Ideal for use cases requiring domain validation and threat assessment, such as web scraping or data fetching.

Canonical page: https://skillsregistry.net/skills/entropy0  
JSON: https://api.skillsregistry.net/v1/skills/entropy0

## Description

Integrates Entropy0's domain trust API with AI agents via MCP. Evaluates URLs and domains for trustworthiness using signals like registration date, brand alignment, and threat intelligence before an agent fetches them. Provides 150 free lookups per month with no API key required to try.

## Trust

- **Trust score (0–1):** 0.64
- **Verification tier:** scanned
- **Last scanned:** 2026-09-01

## Facts

- **Version:** 1.0.0
- **Skill type:** atomic
- **Execution layer:** mcp-remote
- **Runtime environment:** api
- **Category:** ai-ml
- **Updated:** 2026-09-01

## Source

- **Source listing:** [PulseMCP](https://www.pulsemcp.com/servers/entropy0)
- **Repository:** <https://github.com/entropy0dev/sdk>

## 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": "entropy0"
    }
  }
}
```

REST: `GET https://api.skillsregistry.net/v1/skills/entropy0` · pull for local use: `GET https://api.skillsregistry.net/v1/skills/entropy0/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