Protect Your Users from Spam & Phishing
Keep your users safe with AI-powered threat detection. Get your free API key instantly and start protecting your application today.
How It Protects Your Users
Our AI analyzes content in real-time and returns clear, actionable results
Send Content
Send any email, message, or text to our API for analysis
AI Analysis
Our AI detects spam, phishing, and scam patterns in milliseconds
Protect Users
Get clear results to block, warn, or allow content through
Why Choose IsThisSpam API
Lightning Fast
Results in under 500ms. Your users won't notice any delay.
Privacy First
Zero-knowledge architecture. We never store your users' content.
High Accuracy
Advanced AI catches threats that traditional filters miss.
Detailed Insights
Understand why content was flagged with clear explanations.
Global Network
Powered by Cloudflare's edge network across 300+ locations.
Easy Integration
Simple REST API with comprehensive documentation.
Perfect For
Email Platforms
Protect users from phishing and spam in their inbox
Messaging Apps
Keep chat and messaging platforms safe from scammers
Enterprise Tools
Secure internal communications and workflows
Marketplaces
Prevent scam listings and fraudulent seller messages
Ready to Protect Your Users?
Get started in minutes with your free API key. No credit card required.
Free tier includes 100 API calls • Upgrade anytime for higher limits