Your signup form is your first impression
A bounced welcome email means a lost user. Validate emails at signup without slowing down your flow.
One API call. JSON response. Sub-second latency.
The cost of bad emails
Of internet traffic is bots
Bots surpassed human traffic in 2025. Bad bots account for 37%.
Source: Imperva, 2025
Of new accounts are fraudulent
Nearly 1 in 12 signups flagged as fraudulent. AI makes them harder to detect.
Source: BIIA, 2025
Fraud prevention market
Projected market size for 2026. Companies investing heavily in validation.
Source: Research and Markets, 2026
How MailCop stops fake signups
Three layers of validation in a single API call. You get a simple "good" or "bad" response, plus detailed metadata if you need it.
Three steps to implementation
Get your API key
Sign up, grab your key from the dashboard. No credit card required to start. 100 free validations included.
Make the API call
One POST request. We check syntax, MX records, and optionally SMTP. Average response time: 200ms. No slowdown to your signup flow.
Handle the response
Status is "good" or "bad". You decide what to do. Block the signup? Show a warning? Flag for review? Your call.
Simple integration
No SDK to install. No complex setup. Just an HTTP request.
- — Sub-second response times
- — 99.9% uptime SLA
- — Rate limits: 60-300 req/min based on plan
- — Zero data retention. We don't store your emails.
What you get back
Complete transparency. No black boxes.
Status values
- good — Email is valid
- bad — Email is invalid
Validation types
- mx — Syntax + MX check (1 credit)
- smtp — Full SMTP verification (10 credits)
API-first pricing
Pay for what you use. Scale as you grow. No surprises.
Starter
Perfect for small teams and solo marketers getting started with email validation.
10,000 credits
- — 60 requests/min
- — Email support
- — Validate email with MX records
- — Manage Email blacklist
Premium
Advanced validation for businesses that need reliable, high-quality email verification.
50,000 credits
- — 300 requests/min
- — 99.9% uptime SLA
- — Priority support
- — Everything included in Starter, and
- — Validate email with SMTP calls
Enterprise
Custom solutions for high-volume senders with specific compliance needs.
- — Custom rate limits
- — 99.99% uptime SLA
- — Dedicated support
- — Everything included in Premium, and
- — Validate email with SMTP calls
1 credit = 1 API call (MX validation) or 10 credits (SMTP validation)
Credits never expire
Ready to implement?
Get your API key in 30 seconds. No credit card required.