Link Marks the Spot

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  Just paste your affiliate URL and let our AI generate three tailored tweet styles—totally free

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  From short punchy tweets to deep threads and influencer-style breakdowns—our AI does it all in seconds.

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  See what creators are saying about Link Marks The Spot

Inspiration

I wanted to generate Twitter content that didn’t feel robotic or artificial. My goal was to learn how to build a fully stacked AI-powered tool from scratch—not just a wrapper, but something engineered end-to-end.

🛠 What It Does

You paste in an affiliate link (e.g. https://shipfa.st/?via=jessyka) and it generates 3 distinct tweet styles tailored to your URL.

It:

• Scrapes the root webpage
• Runs a SERP analysis using SerpAPI
• Extracts metadata, headings, and keywords
• Uses LangChain with custom prompts to generate natural, relevant tweets

I also implemented a localized cache system that lets users regenerate tweets without burning API tokens, saving both compute and cost.

How We Built It

• Used Netlify to deploy and host the frontend and backend serverless functions
  
• Used Supabase as the backend database, handling storage, queries, and RLS
  
• Wrote serverless functions to orchestrate LangChain + OpenAI usage
  
• Limited requests to 1–3 per prompt and verified output quality before implementation
  
• Focused on modular design and tight feedback loops during development

Challenges We Ran Into

The hardest part was integrating all the backend logic.

• Supabase took time to learn—configuring tables, roles, and permissions
  
• Netlify Functions required precise debugging for logic and API
  
• Managing environment variables securely was imoprtant
  
• I spent several 10+ hour days debugging logs, function errors, and integration flow

Accomplishments We’re Proud Of

• Full Netlify + Supabase integration without relying on third-party wrappers
  
• Custom PostgreSQL database setup in Supabase
  
• Backend logic written entirely in serverless functions
  
• Structured content scraping + SEO-aware tweet generation
  
• Custom token-saving cache system to reduce API costs
  
• LangChain pipeline customized with multiple prompt styles

What I Learned

• How to build and deploy serverless APIs with Netlify
  
• How to architect and secure a Supabase backend with dynamic data
  
• How to integrate LangChain + OpenAI into a structured generation system
  
• How to log, test, and monitor real-time backend workflows
  
• How to build a data-first, full-stack AI tool from scratch

What’s Next for Link Marks the Spot

• Add more tweet formats (e.g., influencer threads, memes, viral formats)
  
• Create a paid plan with advanced prompt tuning and analytics
  
• Launch a Chrome extension for instant tweet generation from any URL
  
• Let users create accounts, view tweet history, and schedule posts
  

Built With

• database-triggers)
• eslint
• javascript
• langchain
• lucide-react
• netlify
• openai-api
• pg-net-extension
• react
• resend-api
• row-level-security-(rls)
• serpapi
• sql-(postgresql)
• ssrf
• supabase-(postgresql-database
• supabase-edge-functions
• supabase/supabase-js
• tailwind-css
• typescript
• vite