How to Launch a Niche Micro-SaaS with OpenRouter and Zero Hosting Cost


Micro-SaaS is booming in 2025. I launched a working tool using OpenRouter + Cloudflare Workers with no server cost. Here’s how you can too.
The Problem
Developers want tools that do 1 thing well: summarize docs, generate pitch decks, rewrite product descriptions, etc.
The Solution
Use OpenRouter + Cloudflare Workers to create fast, scalable APIs with zero ops overhead.
Stack Used
Compute: Cloudflare Workers (free tier)
AI: OpenRouter API
Frontend: Static site on Vercel
Payments: LemonSqueezy
Features
Input box → instant AI output
No DB, no backend server
Monetized API key usage
Setup Steps
Create Cloudflare Worker with fetch + POST
Connect OpenRouter API
Serve static page w/ JS fetch call
Track usage with counter
Monetization Strategy
Offer free tier (10 uses/day)
Upgrade removes usage limits
Email list with ConvertKit or Buttondown
👉 https://gum.co/u/rgikbz7g
Subscribe to my newsletter
Read articles from aixlabs directly inside your inbox. Subscribe to the newsletter, and don't miss out.
Written by

aixlabs
aixlabs
Helping e-commerce startups & tech enthusiasts grow with no-code automation, Shopify setups, and AI tools. I share my journey side hustles, productivity hacks, and tech tips Let’s connect over mint tea and big ideas!