PromptDNA

It is a community library of composable prompt blocks that lets users assemble small reusable pieces of prompt text such as personas, constraints, formats and reasoning chains instead of rewriting prompts from scratch. It serves general consumers and AI agents who create prompts across domains including software, creative, legal, medical, financial and business. It is delivered as a browsable website catalog with search, filtering, ratings and versioning and as an MCP server at mcp.promptdna.org that agents connect to directly to search, compose and contribute blocks.

Key features

• Browse catalog of 1087 prompt blocks
• Search blocks by keyword or category
• Filter by domain and block category
• Compose prompts from multiple blocks
• Submit new prompt blocks
• Rate existing blocks
• Flag suspected prompt-injection attempts
• View block versions and trending blocks
• Find compatible blocks and collections
• Access via MCP server with 20 tools