otpbox

Guides

Practical, code-first guides for testing sign-up and verification flows with a real disposable inbox — for test suites and for AI agents.

Playwright

Test email verification in Playwright

Sign up, receive a real OTP, and finish the flow — with otpbox-playwright, otpbox-sdk, or plain REST.

 Cypress

Test email verification in Cypress

Use otpbox-sdk from a cy.task() to create an inbox and wait for the code inside a Cypress spec.

 MCP · AI agents

OTP testing for AI agents

Give an agent its own inbox over MCP so it can sign up and read a verification code mid-task.

 Comparison

OTPBox vs. Mailinator vs. Mailosaur

An honest, factual look at where each tool fits — API-first testing infra vs. general disposable mail.

Looking for the API reference instead? See the docs, or check pricing. Product updates live in the changelog.

API docs Pricing Changelog Open the app
← Back to OTPBox