Everything MCP Server

A reference MCP server running on Cloudflare Workers that exercises all features of the Model Context Protocol.

Tools

• echo — echoes back input
• get-annotated-message — annotated messages with priority & audience
• get-tiny-image — returns a tiny MCP logo image
• get-sum — adds two numbers
• get-structured-content — structured weather data with output schema
• get-resource-reference — returns a resource content block
• get-resource-links — returns resource link blocks
• trigger-long-running-operation — progress reporting demo
• toggle-simulated-logging — periodic multi-level logging
• toggle-subscriber-updates — resource subscription notifications

Resources

• Dynamic text & blob templates (demo://resource/dynamic/…)
• Static documents (instructions.md, features.md)

Prompts

• simple-prompt — no arguments
• args-prompt — city + optional state
• completable-prompt — auto-completing department & name
• resource-prompt — embeds a dynamic resource