MCP Playground is an MCP server that provides a reference implementation in Go for real-time bidirectional file communication. It connects local text files to MCP clients, allowing developers, system builders, and testers to explore the reactive capabilities of the Model Context Protocol. By running file monitoring services locally, it detects changes made by external processes to communication files and pushes updates back to the connected client. Users can write messages to a managed file, read the current contents, view recent external changes, and track active monitoring statuses. The server also serves a live communication resource that broadcasts real-time update notifications when files change outside the client. MCP Playground enables software engineers to evaluate Go-based MCP servers, test notification handling in MCP clients, and experiment with reactive AI workflows that respond dynamically to local disk modifications.
Category: Other & General Purpose
Tags: demo, example, filesystem, golang
Follow these steps to build and integrate MCP Playground with Claude Desktop: 1. Clone the repository and build the binary using the task runner: bash task build 2. Open your Claude Desktop configuration file (claude_desktop_config.json). 3. Add the server under the mcpServers object, pointing to the built binary: json { "mcpServers": { "mcp-playground": { "command": "/path/to/mcp-playground/bin/mcp-playground", "args": [] } } } 4. Restart Claude Desktop to start using the tools and monitoring features.
Part of MCP Servers
MCP Playground is an open demonstration server implemented in Go. It allows developers to test real-time bidirectional file communication and resource update notifications between local files and MCP clients.
The server includes tools named start_file_monitoring, write_to_file, read_communication_file, get_recent_changes, and get_monitoring_status. These tools allow reading, writing, and inspecting changes made to local files.
MCP Playground works with Claude Desktop and any other MCP-compliant client that supports standard input and output communication and MCP resource notifications.
Once file monitoring is started with start_file_monitoring, external changes to the target file are automatically detected, prompting the server to emit notifications/resources/updated events to the connected client.