# Crawl4ai Web Crawler

> Use this tool when you need to extract content from websites for research, data collection, or content analysis. The Crawl4ai Web Crawler enables AI assistants to initiate crawl tasks with configurable parameters and retrieve results in various formats, including markdown and HTML. It solves problems of web content gathering and processing, accepting inputs like crawl depth and strategy, and outputting formatted content for further analysis.

Canonical page: https://skillsregistry.net/skills/rainyheart-crawl4ai  
JSON: https://api.skillsregistry.net/v1/skills/rainyheart-crawl4ai

## Description

JCrawl4ai MCP Server provides a bridge to the Crawl4ai web crawling service, enabling AI assistants to extract content from websites. Built with Spring Boot by Ken Ye, this Java implementation exposes two main tools: one for initiating crawl tasks with configurable parameters like depth and strategy, and another for retrieving results in various formats including markdown and HTML. The server communicates with the Crawl4ai API using bearer token authentication and supports the STDIO transport protocol, making it particularly valuable for AI assistants that need to gather and process web content for research, data collection, or content analysis.

## Trust

- **Trust score (0–1):** 0.65
- **Verification tier:** scanned
- **Last scanned:** 2026-09-02

## Facts

- **Version:** 1.0.0
- **Skill type:** atomic
- **Execution layer:** mcp-remote
- **Runtime environment:** api
- **Category:** browser-automation
- **Updated:** 2026-09-02

## Source

- **Source listing:** [PulseMCP](https://www.pulsemcp.com/servers/rainyheart-crawl4ai)
- **Repository:** <https://github.com/rainyheart/jcrawl4ai-mcp-server>

## 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": "rainyheart-crawl4ai"
    }
  }
}
```

REST: `GET https://api.skillsregistry.net/v1/skills/rainyheart-crawl4ai` · pull for local use: `GET https://api.skillsregistry.net/v1/skills/rainyheart-crawl4ai/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