---
title: "List available version upgrades"
method: GET
path: "/api/v1/k8s/clusters/{cluster_id}/upgrades"
tags: ["Kubernetes"]
---

# List available version upgrades

`GET /api/v1/k8s/clusters/{cluster_id}/upgrades`

The Kubernetes versions this cluster can upgrade to right now — patch releases of its current minor and the next minor (Kubernetes upgrades one minor at a time) — plus the cluster's upgrade state, mode and maintenance window.

## Path parameters

- `cluster_id` string, required

## Headers

- `X-Project-ID` string, uuid, required

## Response `200`

Upgrade state and available targets

- object
  - `success` boolean
  - `current_version` string
  - `upgrade_status` 'idle' | 'scheduled' | 'upgrading' | 'failed'
  - `target_version` string — Set while an upgrade is in flight or failed
  - `upgrade_mode` 'manual' | 'auto_patch' | 'auto_minor'
  - `maintenance_day` integer — 0 (Sunday) to 6 (Saturday)
  - `maintenance_start` integer — Window start hour (UTC); the window is 4 hours
  - `available` object[]
    - `version_id` integer
    - `version` string
    - `rke2_version` string
    - `is_minor` boolean — true for a minor hop, false for a patch
    - `is_default` boolean

## Other responses

- `404` — Resource not found

## Changes

- **2026-08-24** `9f5798fcd5a1` — 1 info
  - endpoint added

[Change history](https://skmtc.dev/rafftechnologies/apis/raff-api/changes/api/v1/k8s/clusters/:cluster_id/upgrades/get.md)

---

[API](https://skmtc.dev/rafftechnologies/apis/raff-api.md) · [All operations](https://skmtc.dev/rafftechnologies/apis/raff-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/rafftechnologies/raff-api/revisions/2f4df56be77c/schema)