Test any email, SMS or user action with one API
From OTP flows to multi-factor authentication, Mailosaur makes it easy to test the moments that matter - catching issues before your users do.
npm create mailosaur@latest
Finance
Healthcare
Retail
Travel
Media
Just some of the things you can test with Mailosaur
Multi-factor authentication
Automate MFA testing for financial apps by testing SMS, email, and authenticator app OTPs. Ensure recovery backup codes, test push notification approval, and trigger MFA for unfamiliar devices or locations to enhance security and prevent unauthorized access.
Order updates
Test order update by ensuring users receive timely notifications for transaction statuses, payment confirmations, and investment portfolio updates. Test alerts for account discrepancies, loan application progress, and subscription renewals.
Delivery updates
Automate delivery update tests by ensuring users receive timely notifications for document deliveries, like account statements and tax forms. Verify alerts for physical card shipments, delivery delays, and tracking info to keep users informed.
Verify your account
Testing for suspicious login attempts, phone number verification, and multi-step authentication for high-risk transactions strengthens fraud prevention and safeguards sensitive financial data.
Works with any testing framework
Mailosaur works with the tools you already use. It's quick and easy to add powerful features to your test setup.
Customer stories
Mailosaur's user-friendly API seamlessly integrates into existing workflows, delivering reliable automation that accelerates development cycles and enhances product quality.
// Step 1: Send an email into Mailosaur
// Step 2: Fetch your message via Mailosaur
const MailosaurClient = require('mailosaur');
const mailosaur = new MailosaurClient('YOUR_API_KEY');
const criteria = {
sentTo: 'anything@YOUR_SERVER_ID.mailosaur.net',
};
const email = await mailosaur.messages
.get(serverId, criteria);
// Step 3: Complete the process
expect(email.subject).toBe('My password reset');// Step 1: Send an email into Mailosaur
// Step 2: Fetch your message via Mailosaur
const MailosaurClient = require('mailosaur');
const mailosaur = new MailosaurClient('YOUR_API_KEY');
const criteria = {
sentTo: 'anything@YOUR_SERVER_ID.mailosaur.net',
};
const email = await mailosaur.messages
.get(serverId, criteria);
// Step 3: Complete the process
expect(email.subject).toBe('My password reset');Automate tests in minutes
With just a few lines of code added to your project
Mailosaur integrates quickly with any test framework including Cypress, Playwright, or Selenium and supports multiple languages, including Python, C#, Java, Ruby, Javascript and Node.js. Set it up in minutes with just a few lines of code, no matter your framework or language of choice.
To start, make sure you have a Mailosaur plan. Then, just visit our documentation to get started.
Security
The highest standard of physical security and environmental controls
Security
Mailosaur is built with privacy, security and operational resilience at its core. We’re ISO 27001 certified and fully comply with standards such as GDPR, DORA, and CCPA, ensuring your data is always protected.
Support
If you have any questions, we're happy to answer them! Our friendly team of technical experts are available by email or chat to help you get the most out of Mailosaur. Explore our documentation or get in touch now.
Test anything your users might do
Automate end-to-end scenarios, validate emails, and integrate with our API for seamless workflows.
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