OTP email testing

Capture OTP emails with programmable inboxes

PostMX gives your app, test suite, or CI pipeline a real inbox so you can receive OTP emails, wait for the next message, and extract verification codes by API.

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Common flows

Built for real verification workflows

Use PostMX to test signup codes, login OTPs, MFA prompts, and one-time verification flows.

Signup OTPs

Create a fresh inbox per test and assert the verification code in seconds.

Login and MFA

Capture one-time codes for auth flows without human inbox checks.

CI-friendly

Run the same OTP assertions in local development, preview environments, and CI jobs.

Webhook or polling

Choose push-based signed webhooks or simple waiting from the API.

CLI example

postmx inbox create --label signup-otp --lifecycle temporary --ttl 15
postmx inbox wait inb_123 --timeout 30
postmx inbox message msg_123

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Related guides

Keep moving from OTPs to the next workflow

Magic link testing Password reset email testing Playwright email testing Email webhooks Temporary inbox API

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Test OTP flows with real inboxes

Create inboxes, wait for verification emails, and extract codes through simple APIs.

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