XYG-LUNA

Posted on Jul 14

Try 252 AI Skills for Free — Just Copy This curl Command

#mcp #ai

I built an MCP Server that bundles 252 AI skills into a single npm package. Each skill costs just 0.05 RMB (about $0.007) per call, with 10 free calls per day. No signup required.

What is MCP?

MCP (Model Context Protocol) is an open protocol by Anthropic that lets AI assistants like Claude Desktop, Cursor, and VS Code connect to external tools and data sources. Think of it as a USB standard for AI tools.

What are the 252 skills?

They cover 15+ categories:

Psychology & Mysticism: MBTI personality analysis, I-Ching divination, tarot reading
Code Development: PR review, bug fixing, API design, system debugging
Productivity: Weekly reports, meeting notes, PPT outlines
E-commerce: Product copywriting, ad copy generation, pricing calculators
Legal: Contract review, legal document templates
Browser Automation: Puppeteer/Playwright scripts
Text Processing: AI text humanizer, academic text authenticity

Technical Architecture

Single npm Package

All 252 skills are stored in one TypeScript file and loaded dynamically at runtime. No external database needed.

Dual Transport Mode

SSE mode: Remote connection, no installation needed
stdio mode: Local run with npx xiangguangyu-mcp-skills

Pay-Per-Use with HTTP 402

Each skill gives 10 free calls per day. After that, the server returns HTTP 402 Payment Required with an Alipay payment link. User scans the QR code, pays 0.05 RMB, and the request is automatically approved.

Quick Start

Claude Desktop / Cursor / VS Code (stdio)

Add this to your MCP config:

{
  "mcpServers": {
    "xiangguangyu": {
      "command": "npx",
      "args": ["-y", "xiangguangyu-mcp-skills@latest"]
    }
  }
}

SSE Remote Connection

{
  "mcpServers": {
    "xiangguangyu": {
      "url": "http://124.222.26.218:3100/sse"
    }
  }
}

12 MCP Tools

The 252 skills are exposed through 12 MCP tools:

discover_skills - Browse all 252 skills
get_skill_detail - Get detailed documentation
skill_mbti-deep-analysis - MBTI personality test
skill_bianzhen - Multi-model fact-checking
skill_zhuojian - 5-layer deep analysis
skill_cuilu - Skill forging engine
skill_ad-copywriter - Ad copy generation
skill_contract-guardian - Contract risk review
skill_weekly-report - Weekly report writer
skill_taobao-listing - E-commerce product copy
skill_game-audio - Game audio design
skill_shijin - Skill quality checker

Real Stats (3 days after launch)

Total calls: 391
Free calls: 376
Paid calls: 8 (all my own tests)
Real users: 2-3
Real revenue: 0

The product works. The payment mechanism works. Now I just need more people to know about it.

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