Open Source Delphi MCP Server

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29 July 2025

TL;DR: We’ve open-sourced our Model Context Protocol (MCP) server for Delphi, enabling seamless integration with Claude Code and other AI assistants for enhanced Delphi development workflows.

Delphi MCP Server provides:

• • Full MCP Protocol Support: Implements the Model Context Protocol specification for seamless AI integration
  • Tool System: Extensible tool system with RTTI-based discovery and execution
  • Resource Management: Modular resource system supporting various content types
  • JSON-RPC 2.0: Standards-compliant JSON-RPC implementation
  • Security: Built-in security features including CORS configuration
  • High Performance: Native implementation using Indy HTTP Server
  • Optional Parameters: Support for optional tool parameters using custom attributes
  • Cross-Platform: Supports Windows (Win32/Win64) and Linux (x64)

Quick Example

<span class="hljs-comment">// Create a custom tool in minutes</span>
<span class="hljs-title">TMyTool</span> = <span class="hljs-keyword">class</span>(TMCPToolBase<TMyToolParams>)
<span class="hljs-keyword">protected</span>
  <span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-title">ExecuteWithParams</span><span class="hljs-params">(<span class="hljs-keyword">const</span> AParams: TMyToolParams)</span>:</span> <span class="hljs-keyword">string</span>; <span class="hljs-keyword">override</span>;
<span class="hljs-keyword">public</span>
  <span class="hljs-function"><span class="hljs-keyword">constructor</span> <span class="hljs-title">Create</span>;</span> <span class="hljs-keyword">override</span>;
<span class="hljs-keyword">end</span>;

<span class="hljs-comment">// Register it automatically</span>
<span class="hljs-keyword">initialization</span>
  TMCPRegistry.RegisterTool(<span class="hljs-string">'my_tool'</span>, 
  <span class="hljs-function"><span class="hljs-keyword">function</span>:</span> IMCPTool 
  <span class="hljs-keyword">begin</span> 
    Result := TMyTool.Create; 
  <span class="hljs-keyword">end</span>);

Get Involved

• ⭐ Star the project on GitHub
• 🐛 Report issues or request features
• 🔀 Submit pull requests – we especially welcome new tool contributions

Need Custom Development?

While Delphi MCP Server is free and open source, if you need custom Delphi development or AI integration for your business applications, let’s talk