Symfony Mcp Server

What is Symfony MCP Server?

A Symfony package to build a Model Context Protocol (MCP) Server, enabling Symfony applications to become platforms for intelligent, context-aware AI agents. It allows developers to transform their Symfony apps into AI-driven systems that can reason, make decisions, and interact with business logic.

How to use Symfony MCP Server?

Install via Composer (requires PHP >=8.2 and Symfony >=6.4). Then implement MCP features such as tools, prompts, resources, and sampling by extending provided interfaces. Run the server using StreamableHTTP or SSE transports for production.

Key features of Symfony MCP Server

• Create AI‑powered tools with dynamic reasoning capabilities
• Define conversation starters and templates (prompts)
• Expose structured data and documents (resources)
• Enable tools to consult LLMs mid‑execution via sampling
• Real‑time progress notifications for long‑running operations
• Support for text, image, audio, and resource outputs
• Secure transports: StreamableHTTP and SSE

Use cases of Symfony MCP Server

• Build an intelligent code review agent that analyzes code for security and performance
• Create a data analysis agent that generates insights and visualizations
• Develop a customer support agent that loads history and suggests responses

FAQ from Symfony MCP Server

What is sampling and how does it work?

Sampling allows tools to consult an LLM during execution, enabling autonomous reasoning and decision‑making. Tools implement SamplingAwareToolInterface to receive a SamplingClient that sends requests to a model (e.g., Claude 3 Sonnet).

Which transports does Symfony MCP Server support?

The package supports StreamableHTTP and SSE (Server‑Sent Events) for secure, production‑ready communication, in addition to STDIO for development.

What are the minimum requirements for using this package?

PHP 8.2 or higher and Symfony 6.4 or higher are required.

Can tools return multiple types of output?

Yes, tools can produce multi‑modal results including text, images, audio, and resources through interfaces like ToolResultInterface.

Is Symfony MCP Server production‑ready?

It includes enterprise‑grade security features (authentication, authorization, fine‑grained access control), and the repository shows active testing and coverage badges, indicating a stable build.