{"slug": "building-an-ai-powered-lead-qualification-api-with-next-js-15-and-gemini-3-5", "title": "Building an AI-Powered Lead Qualification API with Next.js 15 and Gemini 3.5 Flash", "summary": "A developer built an AI-powered lead qualification API using Next.js 15 and Gemini 3.5 Flash. The API analyzes incoming leads and assigns a priority score to help teams focus on high-value prospects. The project includes a production-ready API route that returns a score, priority, and reason for each lead.", "body_md": "Every business wants more leads.\n\nBut the real challenge isn't generating them—it's identifying which leads deserve your team's attention first.\n\nInstead of manually reviewing every inquiry, we can build a simple AI-powered API that analyzes incoming leads and assigns a priority score automatically.\n\nIn this article, I'll show a lightweight production-ready approach using Next.js 15 and Gemini 3.5 Flash.\n\nProject Structure\n\n```\napp/\n ├── api/\n │    └── qualify/\n │          └── route.ts\n ├── lib/\n │    └── gemini.ts\n └── page.tsx\nAPI Route\nimport { NextResponse } from \"next/server\";\n\nexport async function POST(req: Request) {\n  const { company, message } = await req.json();\n\n  const prompt = `\n  Company: ${company}\n\n  Message:\n  ${message}\n\n  Give:\n  - Score (1-100)\n  - Priority\n  - Reason\n  `;\n\n  // Call Gemini API here\n\n  return NextResponse.json({\n    success: true,\n    score: 92,\n    priority: \"High\"\n  });\n}\n```\n\nExample Response\n\n```\n{\n  \"score\": 92,\n  \"priority\": \"High\",\n  \"reason\": \"Large company with a clear automation requirement.\"\n}\n```\n\nNow your CRM, chatbot, or automation workflow can instantly decide which leads should be contacted first.\n\nWhy This Matters\n\nA simple AI scoring layer can help teams:\n\nReduce manual lead review\n\nRespond faster to high-value prospects\n\nPrioritize enterprise customers\n\nImprove sales efficiency\n\nSave hours every week\n\nThe best part is that this API can be connected to forms, chatbots, CRMs, or n8n workflows without changing your existing process.\n\nProduction Tips\n\nBefore deploying this to production, make sure you:\n\nValidate incoming requests\n\nStore API keys securely\n\nAdd rate limiting\n\nLog AI responses for monitoring\n\nCache repeated requests where appropriate\n\nSmall improvements like these make a huge difference once traffic starts growing.\n\nFinal Thoughts\n\nAI shouldn't replace your sales team—it should remove repetitive work so they can focus on conversations that actually matter.\n\nA lightweight lead qualification API is one of the fastest AI features you can add to an existing product, and it scales well as your business grows.\n\nIf you're building AI agents, automation systems, or custom business workflows, I regularly share practical engineering articles and production-ready implementation ideas.\n\n🌐 Agency: [https://spaceai360.com/](https://spaceai360.com/)\n\nWe build AI agents, workflow automation, custom chatbots, and modern web applications that help businesses automate repetitive work and scale faster.", "url": "https://wpnews.pro/news/building-an-ai-powered-lead-qualification-api-with-next-js-15-and-gemini-3-5", "canonical_source": "https://dev.to/shahdinsalman/building-an-ai-powered-lead-qualification-api-with-nextjs-15-and-gemini-35-flash-ag9", "published_at": "2026-07-14 06:45:38+00:00", "updated_at": "2026-07-14 07:01:29.232314+00:00", "lang": "en", "topics": ["artificial-intelligence", "large-language-models", "developer-tools", "ai-products"], "entities": ["Next.js 15", "Gemini 3.5 Flash", "SpaceAI360"], "alternates": {"html": "https://wpnews.pro/news/building-an-ai-powered-lead-qualification-api-with-next-js-15-and-gemini-3-5", "markdown": "https://wpnews.pro/news/building-an-ai-powered-lead-qualification-api-with-next-js-15-and-gemini-3-5.md", "text": "https://wpnews.pro/news/building-an-ai-powered-lead-qualification-api-with-next-js-15-and-gemini-3-5.txt", "jsonld": "https://wpnews.pro/news/building-an-ai-powered-lead-qualification-api-with-next-js-15-and-gemini-3-5.jsonld"}}