Prompty
Structured prompt builder that treats prompts like code, with versioning and a reusable building-block library
Prompty is a structured prompt builder for large language models. Instead of writing prompts as freeform text, it composes them from five reusable building blocks: task, persona, tone, output format, and constraints. Blocks can be grouped into collections and libraries, then shared publicly or kept private.
Prompts are versioned: when a building block changes, older prompt versions keep their original text, so past results stay reproducible. Developers can fetch and use prompts programmatically through a REST API, the @prompty-tools/core TypeScript client, or an MCP server that plugs into Claude Desktop and Cursor.
Pricing: Free tier; Pro at EUR 4.99/mo
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