Use documented examples
Swagger documentation often contains the first shared version of an API. Turn those documented examples into real mock responses so clients can integrate early. Focus on stable response envelopes, error formats, and field names that are unlikely to change.
GET /api/subscriptions/current
200 OK
{
"plan": "team",
"status": "active",
"renewsAt": "2026-07-01T00:00:00Z"
}