PassCheck
API that checks password strength and common breach exposure
● The Problem
Developers implement weak password validation (8 chars + special character). Real password security requires checking against breached databases, common patterns, and contextual weakness.
● The Solution
An API that scores password strength, checks against 14B+ breached credentials, detects common patterns, and suggests improvements. Drop-in JavaScript widget for signup forms.
Key Signals
MRR Potential
$5K-20K
Competition
Low
Build Time
2-4 Weeks
Search Trend
stable
Market Timing
Password breaches continue at record pace. Users reuse passwords across services. Basic validation rules are not enough.
MVP Feature List
- 1Password strength scoring
- 2Breach database check
- 3Pattern detection
- 4JavaScript widget
- 5REST API
Suggested Tech Stack
Go-to-Market Strategy
Free for 1000 checks/month. $9/month for unlimited. Target developers building auth systems.
Target Audience
Monetization
FreemiumCompetitive Landscape
HIBP offers a breach check API. zxcvbn is open-source strength estimation. No product combines both with a drop-in widget and enterprise API.
Why Now?
Credential stuffing attacks are rising. 14B+ credentials are breached. Simple password rules create a false sense of security.
Tools & Resources to Get Started
Build It with AI
Open directly in an AI code generator or copy the prompt to start building PassCheck in minutes.
Replit Agent
Full-stack MVP app
Bolt.new
Next.js prototype
v0 by Vercel
Marketing landing page
Frequently Asked Questions
What problem does PassCheck solve?
Developers implement weak password validation (8 chars + special character). Real password security requires checking against breached databases, common patterns, and contextual weakness.
How much MRR can PassCheck generate?
PassCheck has $5K-20K MRR potential with a Freemium model. The estimated build time is 2-4 Weeks with Low competition in the market.
What are the MVP features for PassCheck?
Password strength scoring. Breach database check. Pattern detection. JavaScript widget. REST API.
What is the go-to-market strategy for PassCheck?
Free for 1000 checks/month. $9/month for unlimited. Target developers building auth systems.
Who is the target audience for PassCheck?
The primary target audience includes Full-stack Developers, Security Engineers, SaaS Founders. Credential stuffing attacks are rising. 14B+ credentials are breached. Simple password rules create a false sense of security.
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