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Example code of nixphp/mcp

Informations about the package mcp

![Logo](https://nixphp.github.io/docs/assets/nixphp-logo-small-square.png) [![NixPHP MCP Plugin](https://github.com/nixphp/mcp/actions/workflows/php.yml/badge.svg)](https://github.com/nixphp/mcp/actions/workflows/php.yml)

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nixphp/mcp

Model Context Protocol (MCP) server implementation for NixPHP (Tools-first).

This plugin turns your NixPHP application into an MCP server that exposes Tools to AI clients such as ChatGPT.

🧩 Part of the official NixPHP plugin collection.

📦 Features

⚠️ This plugin currently operates in Tools-only mode. MCP Resources are currently not supported.

📥 Installation

The plugin auto-registers an MCP endpoint at:

The endpoint uses MCP Streamable HTTP in its minimal request/response form:

Authentication

The endpoint is protected by Bearer token authentication by default. Tokens are stored file-based, so apps can use MCP without introducing database tables.

Default token file:

App configuration may override or disable this:

For internal or local-only projects authentication can be opened explicitly:

Create a token from application code:

If nixphp/cli is installed, the plugin registers token commands automatically:

Clients send the token as:

Tool Scopes

Tools may opt into scope checks by implementing ScopedToolInterface:

Supported scope patterns:

Core Concept: Tools

Tools represent actions.

They:

Examples:

How the model interacts with your app (initialize)

On connection, the MCP server announces capabilities, not concrete tools.

Response (simplified):

capabilities.tools signals that this server supports MCP tools.

Tool Discovery (tools/list)

Clients explicitly request the available tools:

Response:

Example Tool: Folder Size

PHP Tool Implementation

How the model is calling the tool (tools/call)

JSON-RPC Request

Response

Action-Based Tools (Optional Pattern)

Tools may expose multiple behaviors via an action parameter:

This allows grouping related operations into a single tool while keeping schemas explicit.

This pattern is optional but recommended for more complex tools.

Storage & Filesystem Access

The plugin ships with a FilesystemStore utility.

Important notes:

Its purpose is to provide:

Typical usage inside a tool:

Storage root (default):

About MCP Resources

This plugin currently does not expose MCP Resources (resources/read, resources/list, resources/write).

Reasoning:

Resources may be added later as an extension.

Requirements

📄 License

MIT License.

All versions of mcp with dependencies

PHP Build Version
Package Version
Requires php Version >=8.3
nixphp/framework Version ^0.1.0
Composer command for our command line client (download client) This client runs in each environment. You don't need a specific PHP version etc. The first 20 API calls are free. Standard composer command

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