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Example code of fastmcphp/fastmcphp

Informations about the package fastmcphp

Fastmcphp

NOTE:

A PHP 8.2+ implementation of the Model Context Protocol (MCP).

Inspired by FastMCP for Python.

Requirements

Installation

Quick Start

Features

Tools

Define callable functions that can be invoked by MCP clients:

Resources

Expose data via URI-based resources:

Prompts

Define reusable prompt templates:

Transports

Three transport modes are supported:

The HTTP transport automatically detects whether Swoole/OpenSwoole is installed. With Swoole, it runs a high-performance async server with multiple workers. Without Swoole, it uses ReactPHP's event-loop-based HTTP server (async, single-process). Swoole is recommended for production deployments.

Authentication

Implement custom authentication providers for bearer tokens, API keys, or any auth system:

AuthRequest

AuthRequest is the abstraction layer between transports and authentication. It normalizes request data from any transport (Swoole HTTP, built-in PHP HTTP, SSE) so auth providers don't need to know transport details.

Token extraction — use getToken() for automatic priority-based lookup:

  1. X-API-TOKEN header (via getApiToken())
  2. Authorization: Bearer <token> header (via getBearerToken())
  3. ?key=<token> query parameter (via getApiKeyFromQuery())

Available methods:

Method Description
getToken() Get token from any source (priority order above)
getHeader(string $name) Get any header value (case-insensitive)
getBearerToken() Extract token from Authorization: Bearer header
getApiToken() Get X-API-TOKEN header value
getApiKeyFromQuery(string $param = 'key') Get token from query parameter
getQuery(string $key) Get any query parameter

Sending tokens from clients:

Per-Tool Authorization

Control access to individual tools, resources, or prompts:

Middleware

Intercept and modify requests/responses:

Multi-Tenant Workspace Support

Fastmcphp supports multi-tenant architectures through the authentication system:

Usage with Claude Code

Add your MCP server to .mcp.json in your project root (or ~/.claude/.mcp.json for global access):

Stdio transport (subprocess — Claude Code manages the process):

HTTP transport (remote — start the server separately):

HTTP with authentication:

Testing

MCP Protocol Support

Feature Status
Tools ✅
Resources ✅
Resource Templates ✅
Prompts ✅
Stdio Transport ✅
HTTP Transport ✅
SSE Transport ✅
Authentication ✅
Middleware ✅
Per-Component Auth ✅
Scopes ✅
Multi-Tenant ✅
Pagination ❌

License

MIT

All versions of fastmcphp with dependencies

PHP Build Version
Package Version
Requires php Version >=8.2
psr/log Version ^3.0
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