# Page Not Found

The URL `other/overview-guides/01-custom-data` does not exist.

You might be looking for one of these pages:
- [MEP to CEP migration](https://doc.batch.com/getting-started/other/implementation-guides/mep-to-cep-migration.md)
- [How to implement mobile push on iOS/Android?](https://doc.batch.com/getting-started/other/implementation-guides/integration-steps.md)
- [How to implement Web Push with Batch?](https://doc.batch.com/getting-started/other/implementation-guides/integration-steps-web.md)
- [Custom Data](https://doc.batch.com/getting-started/features/customer-engagement-platform/profiles/custom-data.md)
- [How to send a transactional email with Batch?](https://doc.batch.com/getting-started/other/implementation-guides/how-to-send-a-transactional-email-with-batch.md)

## How to find the correct page

1. **Browse the full index**: [/sitemap.md](https://doc.batch.com/sitemap.md) - Complete documentation index
2. **View the full content**: [/llms-full.txt](https://doc.batch.com/llms-full.txt) - Full content export

## Tips for requesting documentation

- For markdown responses, append `.md` to URLs (e.g., `/getting-started/other/implementation-guides/mep-to-cep-migration.md`)
- Use `Accept: text/markdown` header for content negotiation