🧰 I Built LLMKit: A Complete Toolkit for Testing LLM APIs

🤔 The Problem ## ✨ The Solution: LLMKit ## 🛠️ Tech Stack ## 🔥 Key Features ## 1. Smart Code Generation ## 2. Shareable Configurations ## 3. Performance Tracking ## 📚 What I Learned ## 🚧 Challenges Solved ## 📊 Results ## 🎯 Try It Out ## 🔮 What's Next? Tired of switching between Postman, documentation, and code editors when testing LLM APIs? I built a solution. 🚀 As a developer working with AI integrations, I was constantly: I built a Next.js app that handles everything in one place: Built with modern technologies: Automatically generates production-ready API integration code in JavaScript, Python, and cURL formats. Just select your model and provider, and get copy-paste ready implementations. Share your exact testing setup via URL parameters. Perfect for team collaboration and documentation. Real-time metrics including response time, token usage, and cost estimation for every API call. Key Insights from Building LLMKit ✅ Free to use - No signup required ✅ 50+ models supported across providers ✅ Mobile responsive - Works on any device ✅ Real-time metrics - Response time, tokens, cost 🔗 Live Demo: https://llmkit.cc Built this because I needed it. Turns out other developers did too! What tools do you use for API testing? 👇 Templates let you quickly answer FAQs or store snippets for re-use. Are you sure you want to hide this comment? It will become hidden in your post, but will still be visible via the comment's permalink. Hide child comments as well For further actions, you may consider blocking this person and/or reporting abuse - Testing Claude on different providers (Anthropic vs third-party) - Writing the same API code over and over - Comparing model responses manually - Sharing configurations via screenshots 😅 - Framework: Next.js 14 with App Router - Language: TypeScript for type safety - Styling: Tailwind CSS + Shadcn/ui components - Theme: Professional dark/light mode with orange accents - Start simple - Over-engineered state management initially - Mobile matters - More mobile users than expected - TypeScript saves time - Caught bugs early in development - User feedback is gold - Early testers revealed UX issues - CORS issues → Next.js API routes as proxy - API key security → Client-side only with warnings - Mobile UX → Tab-based navigation for small screens - API developers testing integrations - Teams comparing model performance - Startups evaluating AI providers - Anyone learning LLM APIs - [ ] User authentication & saved configs - [ ] Team collaboration features - [ ] API usage analytics - [ ] Streaming response support