# Fidro

> Fraud detection and email validation API for developers. Validates emails, analyzes IPs, detects VPNs/proxies, and prevents Stripe chargebacks with real-time risk scoring. Single API call, under 200ms response time.

## Main Pages

- [Homepage](https://fidro.io/): Fraud detection API overview and live demo
- [Pricing](https://fidro.io/pricing): Usage-based plans from free (200 req/mo) to enterprise
- [Features](https://fidro.io/features): Full feature breakdown across email, IP, and chargeback prevention
- [Documentation](https://fidro.io/docs): API reference, quickstart guide, and integration tutorials
- [Full API context for LLMs](https://fidro.io/llms-full.txt): Comprehensive API docs with code examples (plaintext)

## Instructions for AI Coding Assistants

Append `.md` to any `/docs/guides/*` or `/blog/*` URL to get raw markdown. For example:

- `https://fidro.io/docs/guides/quickstart.md`
- `https://fidro.io/blog/how-to-block-disposable-emails.md`

## API Products

### Email Validation
- Disposable email detection (50,000+ known domains)
- Domain verification and MX record checking
- Syntax validation (RFC compliance)
- Domain age and reputation scoring
- Custom blocklist management

### IP Intelligence
- VPN, proxy, and Tor detection
- Geolocation (country, city, ISP)
- Datacenter/hosting provider identification
- IP reputation and abuse scoring

### Stripe Chargeback Prevention
- Pre-transaction risk scoring with 14+ risk factors
- Email + IP + geolocation cross-referencing
- Real-time recommendations (allow, review, block)
- Webhook integration for automated decisions

## Free Developer Tools

- [Email Checker](https://fidro.io/tools/email-checker): Check any email for disposable status, MX records, and risk score
- [IP Checker](https://fidro.io/tools/ip-checker): IP geolocation, VPN/proxy detection, and reputation lookup
- [VPN Detector](https://fidro.io/tools/vpn-detector): Check if an IP is a VPN, proxy, or Tor exit node
- [Domain Checker](https://fidro.io/tools/domain-checker): Check domain reputation and email provider details
- [Bulk Email Checker](https://fidro.io/tools/bulk-email-checker): Validate email lists in bulk

## Integration Guides

- [Laravel](https://fidro.io/integrations/laravel): Custom validation rules and middleware for Laravel
- [Node.js](https://fidro.io/integrations/nodejs): Fraud prevention middleware for Express/Node.js
- [Python](https://fidro.io/integrations/python): Email validation and IP analysis in Python
- [PHP](https://fidro.io/integrations/php): Native PHP integration with Guzzle
- [Next.js](https://fidro.io/integrations/nextjs): Server-side validation in Next.js API routes
- [Django](https://fidro.io/integrations/django): Django form validation and middleware
- [Go](https://fidro.io/integrations/go): Go HTTP client integration
- [Ruby](https://fidro.io/integrations/ruby): Ruby integration with Faraday
- [Express](https://fidro.io/integrations/express): Express.js middleware patterns
- [FastAPI](https://fidro.io/integrations/fastapi): FastAPI dependency injection pattern

## Use Cases

- [SaaS Signup Protection](https://fidro.io/use-cases/saas-signup-protection): Block fake signups and free tier abuse
- [Stripe Chargeback Prevention](https://fidro.io/use-cases/stripe-chargeback-prevention): Pre-transaction fraud scoring for Stripe
- [Free Tier Abuse Prevention](https://fidro.io/use-cases/free-tier-abuse-prevention): Stop disposable email multi-accounting
- [E-commerce Fraud Detection](https://fidro.io/use-cases/ecommerce-fraud-detection): Block fraudulent orders at checkout
- [Account Takeover Prevention](https://fidro.io/use-cases/account-takeover-prevention): Detect suspicious login patterns
- [Marketplace Trust & Safety](https://fidro.io/use-cases/marketplace-trust-safety): Two-sided fraud prevention

## Comparisons

- [Fidro vs Kickbox](https://fidro.io/compare/kickbox)
- [Fidro vs ZeroBounce](https://fidro.io/compare/zerobounce)
- [Fidro vs NeverBounce](https://fidro.io/compare/neverbounce)
- [Fidro vs Stripe Radar](https://fidro.io/compare/stripe-radar)
- [Fidro vs IPQualityScore](https://fidro.io/compare/ipqualityscore)
- [Fidro vs MaxMind](https://fidro.io/compare/maxmind)
- [Fidro vs Sift](https://fidro.io/compare/sift)
- [Fidro vs Hunter.io](https://fidro.io/compare/hunter-io)

## Blog (Developer Guides)

- [How to Block Disposable Emails in Laravel, Node.js, Python & PHP](https://fidro.io/blog/how-to-block-disposable-emails) ([markdown](https://fidro.io/blog/how-to-block-disposable-emails.md))
- [Building a Fraud Prevention Middleware in Node.js](https://fidro.io/blog/building-fraud-prevention-middleware-nodejs) ([markdown](https://fidro.io/blog/building-fraud-prevention-middleware-nodejs.md))
- [Adding Email Validation to Laravel](https://fidro.io/blog/adding-email-validation-to-laravel) ([markdown](https://fidro.io/blog/adding-email-validation-to-laravel.md))
- [Email Validation API Integration Guide](https://fidro.io/blog/email-validation-api-integration-guide) ([markdown](https://fidro.io/blog/email-validation-api-integration-guide.md))
- [How to Reduce Your Stripe Chargeback Rate Below 1%](https://fidro.io/blog/how-to-reduce-stripe-chargeback-rate-below-1-percent) ([markdown](https://fidro.io/blog/how-to-reduce-stripe-chargeback-rate-below-1-percent.md))
- [VPN Detection API for Developers](https://fidro.io/blog/vpn-detection-api-developers-guide) ([markdown](https://fidro.io/blog/vpn-detection-api-developers-guide.md))
- [IP Risk Scoring for Developers](https://fidro.io/blog/ip-risk-scoring-developers-guide) ([markdown](https://fidro.io/blog/ip-risk-scoring-developers-guide.md))
- [Fraud Prevention API Integration: Zero to Protected in 30 Minutes](https://fidro.io/blog/fraud-prevention-api-integration-guide) ([markdown](https://fidro.io/blog/fraud-prevention-api-integration-guide.md))
- [Best Email Validation APIs Compared (2026)](https://fidro.io/blog/best-email-validation-api-comparison) ([markdown](https://fidro.io/blog/best-email-validation-api-comparison.md))
- [How to Prevent Fake Signups Without Killing Conversion](https://fidro.io/blog/prevent-fake-signups-without-killing-conversion) ([markdown](https://fidro.io/blog/prevent-fake-signups-without-killing-conversion.md))

## Company

- Website: https://fidro.io
- Category: SaaS, API, Fraud Prevention, Email Validation, IP Intelligence, Chargeback Prevention