Stop fake signups before they start.

Protect your app from disposable and temporary emails with the fastest disposable-email detection API.

Simple REST API

99.9% uptime

Free tier for developers

Real-time domain updates

Request:

curl "https://bifrost.api-shield.com/v1/[email protected]" \

-H "Authorization: Bearer YOUR_API_KEY"

Response:

{

"email": "[email protected]",

"is_disposable": true,

"domain": "mailinator.com"

}

Fake users cost real money.

Every fake signup wastes resources, skews analytics, and opens abuse vectors.

Trial Abuse

Disposable emails let bots grab your free trials endlessly.

Bad Data

Skewed sign-up metrics ruin your marketing and churn analysis.

Security Risk

Fake accounts often lead to spam and fraud attempts.

Impact Metrics

Real results from companies using API-Shield

Without API-Shield

Fake Signups

Average across platforms

10.2%

of total signups

Trial Abuse Rate

Multiple free trials per user

23%

abuse attempts

Data Quality

Analytics accuracy

67%

reliable data

With API-Shield

Fake Signups

Blocked at API level

0.3%

of total signups

Trial Abuse Rate

Prevented by email validation

1.2%

abuse attempts

Data Quality

Clean, actionable insights

98%

reliable data

Simple. Fast. Accurate.

Plug API-Shield into your signup flow or backend in minutes.

Send any email to /v1/check via REST

Simple HTTP GET request with the email parameter. No complex setup required.

Get instant response with metadata

Receive is_disposable status, domain metadata, and data source information in milliseconds.

Decide your policy

Block, flag, or score user quality based on the response. Full control over your signup flow.

Python Example:

import requests

r = requests.get(

"https://bifrost.api-shield.com/v1/check",

params={"email": "[email protected]"},

headers={"Authorization": "Bearer aps_test_123"}

)

(r.json())

Response:

{

"email": "[email protected]",

"is_disposable": true,

"domain": "mailnesia.com",

"data_source": "community"

}

What makes API-Shield different

Built for developers who need reliable, fast, and accurate disposable email detection.

Fast edge response

Sub-50ms latency from our global CDN edge.

Regularly updated list

Auto-refreshed disposable domain data from 1000+ sources & CT logs.

Smart heuristics

Detects newly registered disposable domains using MX + WHOIS age + patterns.

Privacy-first

No email content stored — ever. Only the domain is checked.

Simple pricing

Transparent per-request pricing, no hidden tiers.

Free forever tier

1,000 checks/month completely free for developers.

Works everywhere emails matter.

From startups to enterprise, API-Shield fits seamlessly into your existing workflow.

SaaS Platforms

Block disposable trial signups automatically.

E-commerce

Stop fake promo or coupon hunters.

CRMs & Databases

Clean existing email lists.

Auth APIs / Gateways

Add one-line disposable email check in signup endpoint.

Simple Integration Flow

Add API-Shield to your existing signup process

User submits email

Standard signup form

Check with API-Shield

One API call

Apply your policy

Block, flag, or allow

Simple and predictable

Transparent pricing that scales with your business. No hidden fees, no surprises.

Free

per month

1,000

monthly checks

Great for small projects

Developer

per month

100,000

monthly checks

Priority API access

Built for developers

Use your favorite language and framework. Our API works everywhere.

Supported Languages & SDKs

Golang

Rust

Node.js

Python

Java

cURL

Can't find your language? Our REST API works with any HTTP client.

Need an SDK? Let us know and we'll prioritize it.

Node.js Example:

import axios from 'axios';

const

res = await axios.get('https://bifrost.api-shield.com/v1/check', {

params: { email: '[email protected]' },

headers: { Authorization: 'Bearer sk_live_ABC123' }

});

console.log(res.data);

Response:

{

"email": "[email protected]",

"is_disposable": true,

"domain": "mailinator.com",

"data_source": "community"

}

Trusted by developers who care about clean data.

Join thousands of developers building better products with reliable email validation.

Used by startups on

ProductHunt

IndieHackers

Dev.to

"API-Shield cut our fake signups by 92% overnight. Integration took 10 minutes."

Rohan

Founder @ SaaSly

10M+

Emails checked daily

99.9%

API uptime

50ms

Average response time

Security & Compliance

Enterprise-grade security and privacy compliance built into every request.

HTTPS/TLS 1.3

All requests use HTTPS/TLS 1.3 encryption for maximum security and data protection.

GDPR Compliant

GDPR-compliant by design. No personal data stored, only domain validation.

Regional Routing

Optional regional edge routing (EU/US/IN) for privacy compliance and performance.

Ready to block fake signups?

Start with the free plan. No credit card needed.