delphi-mcp-server

The most comprehensive MCP server for Delphi development — 43 tools covering VCL, FireMonkey (FMX), and RTL knowledge, code generation, compile-and-fix loops, project analysis, and a 777-symbol third-party library knowledge pack. Ships with a native RAD Studio IDE plugin and a Claude Code marketplace plugin.

Status: v1.2.0 — Claude Code plugin + knowledge_pack_search tool + Enterprise tier. Windows-only for compile (Delphi 12 + 13); knowledge/search tools work anywhere. Commercial use requires a subscription (see LICENSE + docs/PRICING.md + docs/ENTERPRISE.md).

Why this one

There are a handful of Delphi MCP servers out there (mcp-delphi, delphi-compiler-mcp, GDK Delphi-MCP-Server, MCPConnect). Here's what's different about this one:

| Capability | This project | Typical alternatives | |---|---|---| | Tool count | 43 | 3–10 | | Third-party symbol knowledge | 777 across 8 curated packs | ❌ | | Component knowledge base | 100+ VCL/FMX components, 60 RTL units, 100 error codes | Minimal or none | | Auto-fix compile errors | Yes, with 777-symbol knowledge pack spanning VCL / FMX / RTL / DevExpress VCL / FastReport VCL / Indy 10 / Spring4D / TMS VCL+FNC | No | | Project HEALTH.md dashboard | Yes (LOC, dependency graph, 3rd-party footprint, knowledge-pack coverage, code-smell flags, delta vs previous runs) | No | | Native RAD Studio IDE plugin | Yes (dockable form, one-click tool access) | No | | Delphi 13 support | Yes | Usually D10.x / D11 only |

We'll keep this table honest. If a competitor ships something useful, it'll show up here.

What's inside

Knowledge & lookup

| Tool | What it does | |---|---| | component_info | Properties, events, methods for any VCL/FMX component | | component_list | Browse 100+ components by framework and category | | explain_error | E/W/H codes with causes and fix suggestions | | rtl_search | Find functions/classes/types across RTL, VCL, FMX | | list_patterns | Available design patterns | | list_form_templates | Available form templates |

Code generation

| Tool | What it does | |---|---| | generate_form | Forms from templates (login, CRUD, master-detail, ...) | | generate_unit | Units (class, interface, record, datamodule) | | code_patterns | Singleton, repository, MVVM, DI, and more — in Delphi | | scaffold_interface | Interface + implementation skeleton |

Project analysis & compile

| Tool | What it does | |---|---| | project_analyze | Structure, conventions, dependencies | | extend_project | Add features respecting existing conventions | | compile_project | Invoke DCC32/DCC64 and parse output | | auto_fix_compile | Iterative compile → parse errors → add missing units → recompile | | lint_delphi | Style and smell checks | | memory_leak_detector | Heuristic leak detection (best-effort, see docs/TOOLS.md) | | db_connect_and_discover | Inspect SQL Server schema (requires ODBC driver) |

Full inventory with maturity tags in docs/TOOLS.md. Honest scope boundaries in docs/LIMITATIONS.md.

Requirements

• Windows 10/11 (Delphi toolchain is Windows-only)
• Node.js ≥ 18
• Delphi 12 and/or 13 for compile/fix tools (knowledge tools work without Delphi installed)
• SQL Server ODBC driver only if using db_connect_and_discover

Install

npm install -g delphi-mcp-server

Or via npx:

npx delphi-mcp-server

On first run, the server auto-detects installed Delphi versions from the Windows registry and writes delphi-mcp.config.json in the current directory. You can edit it to override paths.

Configure your MCP client

Claude Code — one-command plugin install

/plugin marketplace add bogdanpricop/delphi-mcp-server
/plugin install delphi-mcp-server@delphi-mcp-server

This installs the MCP server configuration and six Delphi slash commands: /delphi-health, /delphi-fix, /delphi-lookup, /delphi-audit, /delphi-pack, /delphi-about. Pairs cleanly with adrianosantostreina/delphi-dev — install both for style-guide auto-activation and MCP tools.

Claude Code — manual MCP registration

If you prefer to register the server without the plugin wrapper:

{
  "mcpServers": {
    "delphi": {
      "command": "npx",
      "args": ["-y", "delphi-mcp-server"]
    }
  }
}

Claude Desktop

Add the same block to claude_desktop_config.json.

RAD Studio IDE plugin (HTTP bridge)

The IDE plugin talks to the server over HTTP on port 19621. Install and run the bridge:

delphi-mcp-server --http

Build the plugin first. The .bpl is not bundled in the npm package. Open ide-plugin/DelphiMCPBridge.dproj in RAD Studio and build Win32 / Release. Then run:

.\scripts\install-ide-plugin.ps1

Full install + troubleshooting guide: docs/IDE_PLUGIN_INSTALL.md. Pre-built .bpls per Delphi version are attached to each GitHub Release if you don't want to build from source.

Quick examples

> What properties does TDBGrid have?
→ component_info

> What does E2003 mean?
→ explain_error

> Which unit has HTTP client support?
→ rtl_search  → System.Net.HttpClient

> Create a login form for VCL
→ generate_form

> Compile C:\Projects\MyApp\MyApp.dproj and fix missing units
→ auto_fix_compile

Local development

git clone https://github.com/bogdanpricop/delphi-mcp-server.git
cd delphi-mcp-server
npm install
npm run build
npm test

Scripts: dev (watch), typecheck, build, test, start, start:http.

License & commercial use

Licensed under the Business Source License 1.1 (see LICENSE).

• Free for personal evaluation, education, and non-commercial open-source projects — 15 tools available.
• Pro subscription ($49/dev/mo) unlocks all 43 tools + the 777-symbol knowledge pack + HEALTH.md dashboard for commercial production use. See docs/PRICING.md.
• Enterprise tier ($199/dev/mo, 5+ seats) adds SLA, on-prem deployment, compliance artefacts, and custom knowledge-pack coverage. See docs/ENTERPRISE.md.
• Automatically converts to Apache 2.0 on 2029-04-18.

For commercial licensing, contact: [email protected]

Tech stack

TypeScript · Node.js · @modelcontextprotocol/sdk · tsup · vitest · Delphi 12/13 FMX + VCL (IDE plugin)