> ## Documentation Index
> Fetch the complete documentation index at: https://developers.senderz.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Sandbox

> Test your integration without sending real messages or submitting SID registrations.

## Overview

All endpoints are available in sandbox mode using `sz_test_` API keys. Sandbox mirrors production behaviour with simulated external systems.

## Messaging sandbox

* Messages are validated and logged but **not dispatched** to any carrier.
* Delivery report callbacks are simulated: `delivered` after 2 seconds.
* To test failure flows, send to a number ending in `0000` (e.g. `+61400000000`). These messages return `failed` status.
* You are not charged for sandbox messages.

```bash theme={null}
curl -X POST https://api.senderz.ai/v1/messaging/messages \
  -H "Authorization: Bearer sz_test_xxxxxxxxxxxxx" \
  -H "Content-Type: application/json" \
  -d '{
    "to": "+61412345678",
    "sender_id": "TestBrand",
    "body": "Sandbox test: your order SYD-12345 has been dispatched.",
    "market": "AU"
  }'
```

## Sender ID sandbox

* Registrations are validated against market rules but **not submitted** to any register.
* Status transitions are simulated on a 5-minute cycle: `pending_review` > `pending_register` > `registered`.
* To test rejection flows, use a `match_value` starting with `REJECT` (e.g. `REJECT Test Pty Ltd`). These SIDs move to `rejected` status with a simulated rejection reason.

## Brand sandbox

* Verification is simulated. Brands with valid identifiers are auto-verified within 10 seconds.
* ABNs starting with `99` are auto-rejected for testing error flows.