The elegant simulation layer for modern teams.
Stop waiting on incomplete backend environments. Mock APIs, catch outgoing SMTP emails, and intercept webhooks in a beautifully controlled local sandbox.
❯ Running user_onboarding.flow...
✓ Mock API: POST /api/users (201 Created)
✓ Webhook intercept: stripe.customer.created
✓ SMTP Catch: "Welcome to MockTray" sent to dev@local
✓ Scenario passed successfully in 142ms.
Built for modern engineering teams
Everything in one tray.
We replaced three different tools with one seamless, interconnected testing environment.
Scenario-Based Testing
Chain API responses to Webhook triggers and SMTP emails. Test your entire user flow from end to end without touching a real database.
SMTP Sandbox
Trap outgoing emails instantly. Preview HTML, inspect headers, and auto-extract OTPs.
Webhook Traps
Generate unique URLs to capture and debug third-party payloads in real-time.
Stateful API Mocks
Return dynamic responses based on request bodies or headers. Simulate 500 errors or extreme latency to test frontend resilience.
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