I Pivoted from 7 APIs to 1 Monitoring Tool — Here's Why

I built a website change monitoring tool over a weekend. Here's why it's more valuable than the 7 APIs I built before it.

The Mistake

I spent hours building 7 developer APIs — screenshots, PDFs, QR codes, email verification, the works. Beautiful landing pages, SDKs, documentation.

Zero paying users. Because screenshot APIs are a commodity. There are 20+ free alternatives.

The Pivot

Then I asked myself: what problem do people actually pay money to solve?

Answer: "Tell me when this webpage changes."

• Visualping charges $14-199/mo for this
• ChangeTower charges $29-249/mo
• Distill.io charges $15-80/mo

People pay because change monitoring saves real time and catches real opportunities:

• Competitor changed their pricing? You know first.
• Dream job posted? You're first to apply.
• Government page updated? You have documentation.
• Product back in stock? You grab it.

What I Built

A simple API that lets you monitor any webpage:

# Create a monitor
curl -X POST https://api.16761.tech/monitors \
  -H "Authorization: Bearer YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "url": "https://competitor.com/pricing",
    "name": "Competitor Pricing",
    "frequency": "hourly",
    "email": "[e-mail]"
  }'

Every check:

1. Takes a full-page screenshot
2. Compares it pixel-by-pixel with the previous one
3. If change > 0.5% (filters out rendering noise) → sends alert with screenshot

Pricing

Plan	Monitors	Frequency	Price
Free	2	Daily	$0
Pro	20	Hourly	$9/mo
Business	100	15-min	$29/mo

70%+ cheaper than alternatives.

Tech Stack

• Playwright for real Chromium rendering
• Node.js + Express
• Pixel-diff comparison
• Telegram alerts (email coming)
• Cron-based worker

Try It

1. Get a free key: api.16761.tech/signup
2. Create a monitor
3. Wait for changes

Landing page: 16761.tech/watch

Lesson Learned

Don't build tools looking for a problem. Find the problem first, then build the minimum tool that solves it.

7 APIs with zero revenue vs 1 monitoring tool with clear value prop. The pivot took 2 hours.

Questions? Comments below 👇