Stop fraud at signup,
not after the chargeback
Score every Stripe payment and signup for fraud risk before it costs you. One API call checks the transaction, email, and IP, then tells you whether to allow, review, or block.
No credit card required with our always-free plan.
Try it: check any email for fraud risk
See how Fidro scores an email address for risk. The full API also checks IP, geolocation, and Stripe payment data. Try our email checker or VPN detector for more.
Free demo limited to 1 request per 30 seconds per IP. Previously tested emails are cached for 24 hours. Sign up to start on the free plan with 200 validations/month.
Chargebacks and fake signups are bleeding you dry
Every chargeback costs you the product, the revenue, and a $15-100 fee. Meanwhile, disposable emails and fake accounts pollute your metrics and waste your team's time.
- Chargebacks above 1% trigger Visa/Mastercard monitoring programs with fines up to $25,000/month.
- Stolen cards processed through Stripe become disputes you can't win and revenue you can't recover.
- Disposable emails and VPNs let abusers create unlimited free accounts and exploit your trial.
The average chargeback costs merchants $190 in fees and lost revenue — and chargeback rates above 1% can trigger monitoring programs from card networks. (Source: Chargebacks911, 2024)
One API call before you process the payment
Add one API call before your Stripe charge or during signup. Fidro checks 14+ risk factors and returns a score with a clear allow, review, or block recommendation.
- Score Stripe transactions against 14+ chargeback risk factors before processing.
- Block disposable emails, VPNs, and proxies at signup to stop abuse before it starts.
- Get a single risk score with human-readable reasons you can act on in code.
What is Fidro?
Fidro is a fraud detection API built for developers who process payments through Stripe. It combines Stripe chargeback prevention, email validation, IP intelligence, and geolocation analysis into a single risk score. Instead of losing revenue to chargebacks and then reacting, teams add one API call before processing the payment to catch stolen cards, disposable emails, VPNs, and high-risk transactions before they cost money.
5,000+
Disposable email domains tracked and updated daily
14+
Risk factors evaluated per Stripe transaction
< 200ms
Average API response time for real-time validation
Live today
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API calls today
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Emails validated
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Risks detected
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Requests right now
Chargeback prevention, email validation, and IP intelligence in one API
Stop stitching together Stripe fraud tools, email validators, and IP lookup services. Fidro runs all checks in a single request and returns one risk score.
Prevent Stripe chargebacks
Score every payment against 14+ risk factors before you process it. Catch stolen cards, mismatched locations, and high-risk patterns.
Risk score every signup
Every signup and payment gets a 0-100 risk score with a clear allow/review/block recommendation you can act on in code.
Block disposable emails
Detect 50,000+ disposable email domains at signup. Stop free tier abuse and fake accounts before they enter your system.
Detect VPNs and proxies
Flag VPNs, proxies, Tor nodes, and datacenter IPs. Match geolocation against billing address to catch mismatches.
Build your own blocklists
Block specific emails, domains, or IPs you've seen before. Build once, apply across all your apps.
Built for developers
REST API with copy-paste code samples. Add to your Stripe webhook or signup form in under an hour.
How It Works
Get started in minutes with our simple integration
Sign Up
Create your account and get your API key in seconds. Start on the free plan—no credit card required.
Integrate
Add one API call to your Stripe webhook or signup form. Copy the code from our docs. 5 lines to start catching fraud.
Protect
Each request returns a risk score and a plain-English recommendation: allow, review, or block.
Teams using Fidro catch fraudulent payments before they become chargebacks, keep disposable emails out of their user base, and stop free tier abuse at the source.
What bad signups and chargebacks actually cost
Most teams underestimate the real cost of not validating signups and payments.
$190
Per chargeback
Lost product, fees, penalties, and operational costs per dispute. Just 10 chargebacks/month = $1,900 lost.
30%+
Fake trial signups
Of free trial signups can be disposable or fake emails. That's wasted infrastructure, skewed metrics, and inflated user counts.
1%
Chargeback threshold
Exceed 1% chargeback rate and Visa/Mastercard put you in monitoring programs with fines up to $25,000/month.
Fidro's free plan catches these problems for $0. Paid plans start at less than the cost of a single chargeback.
Start free, scale as you grow
Start with the free developer plan, then upgrade only when your volume and fraud needs grow. All plans include our core fraud detection features.
Free
- 200 validations/month
- Email, IP & geolocation checks
- Risk scoring
- GitHub Issues support
Starter
That's $0.97/day
- 5,000 validations/month
- Custom blocklists
- Webhook callbacks
- Email support
Pro
That's $6.63/day
- 50,000 validations/month
- Stripe chargeback prevention
- Risk trend dashboard
- Priority email support
Enterprise
- Custom validations
- Dedicated account manager
- Custom risk weights
- SLA guarantee
All plans include full email, IP, and geolocation checks. Upgrade or downgrade anytime — no contracts, no lock-in.
Fidro never stores the emails or IPs you validate. Data is processed in real-time and discarded.
Start catching bad signups in the next 5 minutes
Create your account, grab your API key, and send your first request. Free plan with 200 validations/month. No credit card. Cancel anytime.
Get Started Free