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Architecture

XanLens is intentionally lean: no database, no user accounts, no session state. Each request is stateless and self-contained.

Stack

  • Next.js 16 on Vercel — frontend and API routes
  • Gemini API — primary AI engine + content generation
  • NVIDIA NIM — Llama 3.3 70B for second engine perspective
  • Tavily API — AI-native search with real-time web data
  • x402 protocol — HTTP-native USDC payments on Base
  • Vercel Edge — global deployment, sub-100ms TTFB

Request Flow

User/Agent → API Route → Audit Engine

Audit Engine → [Gemini, Llama, Tavily] (parallel)

Audit Engine → Site Crawler → Score + Findings

Score + Findings → Content Generator → 7 Content Types

→ JSON Response

Design Principles

  • Stateless — no database, no sessions, no auth tokens
  • Fast — parallel engine queries, edge-deployed
  • Portable — works from any HTTP client, curl to Claude
  • Transparent — scores show exactly what each engine said