v2.5.0 · MCP Server Live

Build prompts
that actually work.

A component-based prompt IDE with a public vault, semantic search, prompt chaining, and an MCP server that plugs directly into Claude Desktop and Cursor.

Open Studio GitHub
45
Components
10
Packs
5
Domains
Free
Always
Features

Everything a prompt needs.
Nothing it doesn't.

Stop re-inventing prompts. Build once, reuse everywhere.

🗄️
Component Vault

45 public personas, protocols, formats, and templates across 5 professional domains. Mix, match, compile.

45 components
🔌
MCP Integration

Install promptbuilder-mcp and your vault becomes native tools in Claude Desktop and Cursor. One-command setup.

npx ready
⛓️
Prompt Chaining

Chain prompts with {{previous_output}} injection. Build multi-step workflows that compound.

v2.4.0+
MCP Server
Your vault,
inside your IDE.

Connect once with your API key. Every component and pack becomes a callable tool — in Claude Desktop, Cursor, or any MCP client.

Claude DesktopCursorAny MCP client
claude_desktop_config.json
{
  "mcpServers": {
    "promptbuilder": {
      "command": "npx",
      "args": [
        "-y",
        "promptbuilder-mcp",
        "--key",
        "YOUR_API_KEY"
      ]
    }
  }
}

// Generate your key at /settings
How it works

Three steps to a better prompt.

Pick components, compile, execute. That's the whole workflow.

1
Pick Components

Browse the vault or search semantically. Add a persona, protocol, format — whatever the task needs.

2
Compile & Chain

The compiler assembles components into a structured prompt. Chain steps with output injection.

3
Execute Anywhere

Run in the Studio, or expose your vault as MCP tools in Claude Desktop and Cursor.

Start building
better prompts.

Free, open source, and yours to use however you want.

Open Studio →npm install