Notes on email, OTPs, and testing.

How to wire programmable email into GitHub Actions, CircleCI, and GitLab — with parallelization, secret scoping, and concurrency that does not blow up at 50 workers.

by catchotp team

Why disposable email domains exist, why they keep getting blocked, what abuse looks like in 2026 — and what makes a programmable inbox different.

by catchotp team

End-to-end guide to testing SMS one-time-password flows with Twilio, Telnyx, and Vonage receivers — and why an email-OTP primitive is often a better proxy.

by catchotp team

How we designed the catchotp inbound pipeline on AWS — SES quirks, why we chose EventBridge, and the trade-offs we'd make differently.

by catchotp team

Test Stripe webhook handlers in CI with no public endpoint. Use catchotp to capture Stripe's email-based test events and EventBridge to fan out to your handler.

by catchotp team

A developer's guide to email-testing solutions: when to use disposable inboxes, when to upgrade to programmable email, and what's worth paying for.

by catchotp team

Building AI agents that can sign up to services, verify accounts, and handle email-based flows — using the Model Context Protocol.

by catchotp team

Stop mocking email in your E2E tests. Use real inboxes, real OTP delivery, and real waiters — without polluting your team inbox.

by catchotp team

What's the difference between disposable inbox sites and programmable email APIs? When to use each, with code examples.

by catchotp team

End-to-end guide to testing one-time-password flows in Node.js, Python, Go, and curl. With Playwright and Cypress integrations.

by catchotp team