# POST /primary_ips/{id}/actions/change_dns_ptr now requires dns_ptr

Calls to POST /primary_ips/{id}/actions/change_dns_ptr, body parameter dns_ptr on Hetzner Cloud API stopped working on September 30, 2026.

- API: Hetzner Cloud API (api.hetzner.cloud)
- Kind: Behaviour change
- Takes effect: September 30, 2026
- Calls after that day: fail
- Calls it hits: `POST /primary_ips/{id}/actions/change_dns_ptr`, `body parameter dns_ptr`
- Source: [Changelog](https://docs.hetzner.cloud/changelog)
- Verified: November 6, 2026, against Hetzner Cloud API's own pages
- Page: https://www.okapi.bot/providers/hetzner-cloud-api/breaking-changes/post-primary-ips-id-actions-change-dns-ptr-now-requires-dns-ptr/

## Hetzner Cloud API's words

> When updating the PTR record (reverse DNS) for a Primary IP, Floating IP, Server, or Load Balancer, the value of dns_ptr is no longer optional and must be provided starting on 30 September 2026.

Okapi finds the calls this change hits in your repo and opens the pull request with the fix: https://github.com/apps/okapi-agent