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:

• Accept CLI arguments (--url)

• Call an MCP tool (fetch__fetch)

• 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.