Stop polluting yourtest suite with real emails
Disposable email inboxes via API. Create, receive, and verify emails programmatically — perfect for CI/CD pipelines, QA automation, and staging environments. Also available as a Chrome extension.
// Create a disposable inbox in 3 lines
const res = await fetch('https://openinbox.io/api/inbox', {
method: 'POST',
headers: { 'Authorization': 'Bearer API_KEY' }
});
const { id, email } = await res.json();
// => { id: "abc123", email: "[email protected]" }
// Poll for incoming emails
const emails = await fetch(
`https://openinbox.io/api/emails/${id}`
).then(r => r.json());Always one click away while you're building
Generate disposable inboxes, auto-fill email fields on any site, and get notified instantly when new emails arrive — without leaving your tab.
- One-click inbox generation from any tab
- Auto-fill email fields on any website
- Real-time notifications for incoming emails
- Manage multiple inboxes from the popup
Instant Inbox
Generate a temp email in one click
Auto-Fill
Fill email fields on any website automatically
Live Notifications
Get alerted the moment an email arrives
Inbox Switcher
Manage multiple inboxes in the popup
Built for Developers
Create inboxes, fetch emails, and set up webhooks — all via a clean REST API. Ship email testing in minutes, not days.
const res = await fetch('https://openinbox.io/api/inbox', {
method: 'POST',
headers: { 'Authorization': 'Bearer YOUR_API_KEY' }
});
const { id, email } = await res.json();
console.log(`Inbox ready: ${email}`);Why Choose OpenInbox?
The most developer-friendly temporary email service — with an API, webhooks, and real-time delivery
REST API
Full REST API for programmatic inbox creation, email retrieval, and webhook integration.
Auto-Expiring
Inboxes automatically delete after expiry. No traces, no cleanup scripts needed.
Real-time WebSockets
Get emails instantly via WebSocket push. No polling, no refresh, sub-second delivery.
Smart OTP Detection
Automatic detection and extraction of verification codes from incoming emails.
Webhooks
Get notified instantly when emails arrive. Perfect for CI/CD pipeline integration.
Privacy First
No personal information required. Stay completely anonymous. Zero data retention after expiry.
Custom Domains
Use your own domain for branded test emails. Great for staging environments.
Built For Your Workflow
From CI/CD pipelines to casual browsing — OpenInbox fits right in
Designed for Privacy Protection
OpenInbox is built for legitimate privacy protection purposes. Our service helps you:
- Protect your primary email from marketing spam and unwanted newsletters
- Test applications and verify email functionality during development
- Sign up for one-time access to content or resources safely
- Maintain online privacy when exploring new services
Prohibited Activities: Using OpenInbox for illegal activities, fraud, harassment, bypassing security measures, creating multiple accounts to abuse services, or any activity that violates our Terms of Service is strictly forbidden. We actively monitor for abuse and cooperate with authorities when required.
Three Simple Steps
Get started in seconds with no signup required
Get Your Inbox
Click the button and instantly receive a unique temporary email address.
Use It Anywhere
Sign up for services, newsletters, or any site requiring email verification.
Receive & Verify
Get emails instantly. OTPs are auto-detected for easy one-click copying.
What Is a Temporary Email?
A temporary email (also called a disposable email, fake email generator, or temp email) is a self-destructing email address you can use to receive email online without revealing your personal inbox.
Why Disposable Email Protects Your Privacy
Every time you share your real email, you risk spam, phishing, and data breaches. A disposable email acts as a shield — companies never see your personal address, and the inbox auto-deletes so there's nothing to leak.
How OpenInbox Works
Click one button to generate a free temp email address. Use it on sign-up forms, receive verification codes in real time, then let the inbox expire. No accounts, no passwords, no traces. Developers can also use our API for automated testing.
Common Use Cases
Testing app sign-up flows, downloading gated content, joining forums, redeeming one-time offers, or simply avoiding newsletter spam. Wherever a site asks for an email, a temporary email keeps your real inbox clean and your identity private.
Frequently Asked Questions
Is OpenInbox really free?
How long does a temporary email last?
Can I receive attachments?
Is it safe to use a disposable email?
Can I use OpenInbox for automated testing?
Choose Your Plan
Start free and upgrade as you grow. All plans include our core features.
Free
Perfect for occasional use
- Inbox Expiry(1 hour)
- Max Active Inboxes(1)
- Real-time Delivery
- OTP Detection
- Ad-Free
- API Access
- Webhooks
- Custom Email Alias
- Custom Domains
Starter
For regular users
- Inbox Expiry(24 hours)
- Max Active Inboxes(3)
- Real-time Delivery
- OTP Detection
- Ad-Free
- API Access
- Webhooks
- Custom Email Alias
- Custom Domains(1 domain · 5K emails/mo)
Pro
For developers & power users
- Inbox Expiry(7 days)
- Max Active Inboxes(10)
- Real-time Delivery
- OTP Detection
- Ad-Free
- API Access(3,000 req/day)
- Webhooks
- Custom Email Alias
- Custom Domains(3 domains · 25K emails/mo)
Business
For teams & high volume
- Inbox Expiry(30 days)
- Max Active Inboxes(Unlimited)
- Real-time Delivery
- OTP Detection
- Ad-Free
- API Access(10,000 req/day)
- Webhooks
- Custom Email Alias
- Custom Domains(10 domains · 100K emails/mo)
Feature Comparison
| Feature | Free | Starter | Pro | Business |
|---|---|---|---|---|
| Inbox Expiry | 1 hour | 24 hours | 7 days | 30 days |
| Active Inboxes | 1 | 3 | 10 | Unlimited |
| Real-time Updates | ||||
| OTP Auto-Detection | ||||
| Push Notifications | ||||
| No Advertisements | ||||
| Email Search | ||||
| API Access | 3,000/day | 10,000/day | ||
| Webhooks | ||||
| Priority Support | ||||
| Custom Domains | 1 | 3 | 10 | |
| Custom Domain Emails/mo | 5,000 | 25,000 | 100,000 |
Need API access for your application? View API Documentation
Get StartedLearn About Email Privacy
Guides and tips to help you protect your inbox and stay anonymous online.
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Join 10,000+ developers using OpenInbox for CI/CD testing, QA automation, and privacy protection.