# E15035 — WhatsAppNumberProfileUnavailable

WhatsApp could not be reached to read or change this number's business profile.

- **HTTP status**: `503`
- **Type**: `service_unavailable_error`
- **Name**: `WhatsAppNumberProfileUnavailable`

## What to do

This profile is read and written at WhatsApp on each request rather than from a stored copy, so a WhatsApp outage or throttle makes it briefly unavailable. Retry in a few seconds. If you were changing the profile, read it back first: a change can have been applied at WhatsApp even though the response could not confirm it.

## Related

- [E15xxx — WhatsApp sending & delivery](/docs/api/errors/E15xxx): every code in this range
- [Errors](/docs/api/errors): the full wire contract, status mapping, and error catalog
- [Error handling](/docs/guides/errors): branching on `type` and `code`, validation details, and `vendor_code`

## Related resources

- [Should I use a Bird SDK or call the API directly?](/explained/platform/should-i-use-an-sdk-or-call-the-api-directly) (answer)
- [Build your first integration](/learn/paths/integration) (course)
- [Send your first email](/docs/get-started/send-your-first-email) (docs)

[Get an implementation brief](/learn/workspace?topic=api-basics)