A Multiplayer API error, sent with HTTP 503. Status: the Multiplayer API is in private alpha; this code is part of its published contract.
When
All sandboxes together are at their ceiling. The answer carries retryAfterSec.
What to do
Try again in an hour, or request an alpha key at https://lobbylab.gg/developers.
The answer
Every error is a JSON body with a stable error code. Clients act on the codes they know and treat any other code as a failure of its HTTP status, and keep fields they do not know.
{
"error": "sandbox_capacity_reached",
"detail": "A sentence that is safe to show.",
"next": "Try again in an hour, or request an alpha key at https://lobbylab.gg/developers.",
"docsUrl": "https://lobbylab.gg/docs/errors/sandbox_capacity_reached",
"retryAfterSec": 60
}This code always carries retryAfterSec.
See also: every error code, the API reference and the docs.