From fixture to endpoint
Local JSON files are useful, but they bypass real network behavior. A JSON-to-API workflow keeps the same sample data while adding status codes, headers, latency, and URL-based integration.
GET /api/metrics
200 OK
{
"activeUsers": 1248,
"conversionRate": 0.083,
"series": [14, 19, 22, 31]
}Use realistic field names, ISO timestamps, stable IDs, and representative empty states. Then create the endpoint on HttpStatus mocks.