PromptArch

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PromptArch is an AI prompt engineering platform that helps professionals build high-quality, model-optimized prompts through guided step-by-step wizards. Instead of writing prompts from scratch, users answer domain-specific questions across 12 specialized categories — from software development and autonomous agents to marketing campaigns and AI agent configurations — and PromptArch generates a tailored prompt scored on four quality dimensions: specificity, context, constraints, and model fit. Each prompt is optimized for the user's target AI model (Claude, ChatGPT, Gemini, or open-source models). The platform includes a prompt library for organizing and iterating on saved prompts, a prompt enhancer for improving existing prompts, and support for context engineering artifacts like system prompts, cursor rules, and MCP tool descriptions. Pay-per-use credit pricing with no subscription required. Available in English, Spanish, and Portuguese.