Openinbox
Disposable email API — create, receive, and verify emails programmatically for testing and privacy.
| What is it | Disposable email API — create, receive, and verify emails programmatically for testing and privacy. |
|---|---|
| Pricing | Freemium — from $7/mo |
| Free tier | Yes |
| Platform | Web Application |
| API | Yes |
| Works with | n8n |
| Best for | Automated email testing in CI/CD pipelines, Verifying signup flows during QA |
| Domain registered | 2026 |
Data updated Aug. 1, 2026
What does Openinbox do?
Openinbox is a disposable email service built for developers. Instead of using your real inbox for testing sign-up flows, verifying email functionality in CI/CD pipelines, or evaluating new tools, you generate a temporary email address through a REST API or on the web. Inboxes auto-expire after an hour (longer on paid plans), so there's no cleanup. A free Chrome extension lets you create an inbox from any tab and auto-fill email fields on websites.
The service delivers emails in real time via WebSocket push — no polling required. It automatically detects and extracts one-time passwords (OTPs) from incoming messages, so you can copy verification codes with one click. Premium plans add webhook routing rules (by subject, sender, or recipient) and support for custom domains. The API is simple: a POST request creates an inbox, and you fetch messages without authentication for basic use. Openinbox also offers an official n8n node for no-code email automations.
Openinbox is most useful for software developers and QA engineers testing email-dependent features without polluting production systems. It also appeals to privacy-conscious users who want to avoid spam and tracking when signing up for newsletters or one-time services. The service is free for basic use, with paid plans from $7/month for longer inbox lifespans, more concurrent inboxes, and advanced webhooks. If you need a reliable way to handle disposable emails in development or privacy scenarios, Openinbox covers the basics well.
Key features
What makes it stand outWho is Openinbox for?
Who benefits most from this toolPricing
Free tier available — start without a credit cardFree
- 1 Temporary Inbox
- 1-Hour Inbox Lifetime
- Real-time Email Delivery
- OTP Auto-Detection
- No Registration Needed
- Custom Domains
7-Day Pass
- 10 Concurrent Inboxes
- 7-Day Inbox Expiry
- API Access (3,000 req/day)
- 1 API Key
- Webhooks
- 3 Custom Domains
- 3,000 Custom Domain Emails/mo
- Priority Support
Pro
- 10 Concurrent Inboxes
- 7 Day Inbox Expiry
- API Access (3,000 req/day)
- Webhooks
- Priority Support
- Custom Email username
- Up to 3 Custom Domains
Business
- Unlimited Inboxes
- 30 Day Inbox Expiry
- Extend Inbox Expiration on Demand
- High Volume API (10k req/day)
- Webhooks
- Priority Support
- Custom Email username
- Up to 10 Custom Domains
Premium
- Conditional Webhook Routing (rules by subject, from & to)
- 90-Day Inbox Lifetime
- Unlimited Inboxes
- Up to 30 Custom Domains
- 75,000 Custom-Domain Emails/mo
- Unlimited Emails on OpenInbox Addresses
- 5 API Keys with Labels
- High Volume API (10k req/day)
- Priority Support
Trust & presence
Gallery
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