All error codes

ssh_key_install_failed

HTTP 503 The platform did not accept the SSH key installation

What happened

The keys you named exist in the project and stay within the per-server limit, but the platform did not accept the installation. This is a temporary failure on our side.

What to do

Read the key set of the server, then send the request again later with a new idempotency key. The operation adds keys, so repeating it does not remove any.

Retrying

The request itself is fine. Repeat it later; after a 5xx use a new idempotency key and read the resource first.

How it arrives

{
    "type": "https://docs.fiberax.com/errors/ssh_key_install_failed",
    "title": "The platform did not accept the SSH key installation",
    "status": 503,
    "code": "ssh_key_install_failed",
    "request_id": "a277dcd1ca652c65"
}

Branch your code on code, never on the wording of title.