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Supported numbers

In sandbox, Rewrite recognizes a small set of magic numbers that force specific outcomes.

Default behavior

If you use another valid number in sandbox, the backend follows the default simulation path and treats the send as a simple success.

Sandbox OTP

For OTP in sandbox:
  • creation still happens through POST /otp
  • verification can be tested with the fixed code 000000
That makes end-to-end tests deterministic without relying on a live provider.

Operational notes

  • These numbers only apply when the project is in sandbox mode.
  • Sandbox does not allow scheduledAt.
  • Emitted webhooks are still signed normally.