# E12064 — SMSKeywordRuleReplyRequired

A keyword rule must have a reply.

- **HTTP status**: `422`
- **Type**: `validation_error`
- **Name**: `SMSKeywordRuleReplyRequired`

## What to do

Set `reply` to the message to send back. To send nothing at all, set `reply` to null and `confirmed_self_managed` to true, which records that you send this reply from your own system.

## Related

- [E12xxx — SMS sending & delivery](/docs/api/errors/E12xxx): 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`