MCP Server logo

MCP Server

by app-appplayer

A Dart plugin for implementing Model Context Protocol (MCP) servers. This plugin allows Flutter applications to expose data, functionality, and interaction patterns to Large Language Model (LLM) applications in a standardized way.

View on GitHub

Last updated: N/A

What is MCP Server?

MCP Server is a Dart plugin that enables Flutter applications to act as servers within the Model Context Protocol (MCP) ecosystem. It provides a standardized way to expose data, functionality, and interaction patterns to Large Language Models (LLMs).

How to use MCP Server?

To use MCP Server, add the package to your pubspec.yaml file and install it. Then, create an McpServer instance, add resources, tools, and prompts to it, and connect it to a transport layer (Standard I/O or Server-Sent Events). The provided code examples demonstrate how to define and add resources, tools, and prompts to the server.

Key features of MCP Server

  • Create MCP servers with standardized protocol support

  • Expose data through Resources

  • Provide functionality through Tools

  • Define interaction patterns through Prompts

  • Multiple transport layers (Standard I/O, SSE)

  • Cross-platform support (Android, iOS, web, Linux, Windows, macOS)

  • Resource Caching

  • Progress Tracking

  • Health Monitoring

Use cases of MCP Server

  • Exposing application data to LLMs for context-aware responses.

  • Allowing LLMs to trigger actions within a Flutter application.

  • Creating interactive experiences driven by LLMs.

  • Building command-line tools that interact with LLMs.

  • Integrating LLMs into web applications using Server-Sent Events.

FAQ from MCP Server

What is the Model Context Protocol (MCP)?

MCP is a standardized protocol for communication between applications and Large Language Models (LLMs).

What are Resources, Tools, and Prompts in MCP?

Resources expose data, Tools provide functionality, and Prompts define interaction patterns.

Which transport layers are supported?

Standard I/O and Server-Sent Events (SSE) are supported.

How do I handle errors in Tool handlers?

Return a CallToolResult with the isError flag set to true and an error message.

How do I update the protocol version?

Check the CHANGELOG.md for protocol version updates and ensure client and server protocol versions are compatible.

MCP Server - MCP Server | MCP Directory