Simple Fetch Skill

When to Use This Skill

Use this Skill to:

• Learn the basic skill pattern
• Fetch content from a URL
• Use as a template for creating custom skills

This is a demonstration skill showing the minimal CLI-based pattern.

What This Skill Does

Demonstrates the core skill pattern:

1. Accept CLI arguments (–url)
2. Call an MCP tool (fetch__fetch)
3. Return result

Instructions

When you need to fetch content from a URL, execute:

cd /home/khitomer/Projects/mcp-code-execution-enhanced

uv run python -m runtime.harness scripts/simple_fetch.py \
    --url "https://example.com"

Parameters

• --url: The URL to fetch (required)

Example Usage

# Fetch a webpage
uv run python -m runtime.harness scripts/simple_fetch.py \
    --url "https://docs.example.com/api"

# Fetch documentation
uv run python -m runtime.harness scripts/simple_fetch.py \
    --url "https://github.com/owner/repo/README.md"

Expected Output

The skill returns the fetched content and prints:

• Success message with byte count
• Or error message if fetch fails

MCP Servers Required

Configure a fetch-capable MCP server in mcp_config.json:

{
  "mcpServers": {
    "fetch": {
      "type": "stdio",
      "command": "uvx",
      "args": ["mcp-server-fetch"]
    }
  }
}

Technical Notes

• Pattern: CLI args → MCP call → Result
• Token cost: ~110 tokens (discover + read + execute)
• Time: <10 seconds
• Immutable: Parameters via CLI, no file editing needed

This skill demonstrates the foundation for creating more complex MCP workflows.