---
title: "POST /v1/{+name}:updatePrimaryVersion"
method: POST
path: "/v1/{+name}:updatePrimaryVersion"
tags: ["projects"]
---

# POST /v1/{+name}:updatePrimaryVersion

`POST /v1/{+name}:updatePrimaryVersion`

Update the version of a CryptoKey that will be used in Encrypt. Returns an error if called on a key whose purpose is not ENCRYPT_DECRYPT.

## Path parameters

- `name` string, required

## Request body

- UpdateCryptoKeyPrimaryVersionRequest — Request message for KeyManagementService.UpdateCryptoKeyPrimaryVersion.
  - `cryptoKeyVersionId` string — Required. The id of the child CryptoKeyVersion to use as primary.

## Response `200`

Successful response

---

[API](https://skmtc.net/google/apis/cloudkms.md) · [All operations](https://skmtc.net/google/apis/cloudkms/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/google/cloudkms/versions/576b283e53dd/schema)