sandbox_ip_limit_reached
The same budget, counted per source address rather than per account - the ceiling that stops one network minting sessions through many accounts. Same body shape and same Retry-After as sandbox_session_limit_reached; a distinct code because the remedy differs (wait, versus wait and stop fanning out).
Problem shape
Every non-2xx response is an RFC 9457 application/problem+json body. The type URI below is stable and machine-matchable, so branch on the final path segment (the code) and treat the status as redundant confirmation. See the error-handling guide.
{
"type": "https://docs.vocapable.com/errors/sandbox_ip_limit_reached",
"title": "…",
"status": 429,
"detail": "…",
"instance": "/v1/…"
}