Simulatechangeswithouttouchingproduction.
Override API responses to test inventory, pricing, content, and promotions on real pages — instantly.
A simulation layer for PMs and designers to preview site changes without engineering bottlenecks or risky deploys.
gw/YOUR_KEY/cms/products'
See the simulation in action
Preview how your site would look if inventory changed, promotions went live, or content updated — all without touching real data.
GET /products
{
"products": [
{
"id": 1,
"name": "Winter Jacket",
"price": 99.99,
"inStock": true
},
{
"id": 2,
"name": "Summer Dress",
"price": 49.99,
"inStock": true
}
]
}GET /products?scenario=spring-promo
{
"products": [
{
"id": 1,
"name": "Winter Jacket",
"price": 79.99,
"inStock": true,
"tag": "SALE"
},
{
"id": 2,
"name": "Summer Dress",
"price": 39.99,
"inStock": true,
"tag": "SALE"
},
{
"id": 3,
"name": "Spring Collection Preview",
"price": 59.99,
"inStock": false
}
]
}Stage transforms responses in real-time without modifying your production data. Perfect for previewing campaigns, testing edge cases, and QA scenarios.
Why teams choose Stage
See, Don't Imagine
Stop mocking up screenshots. Preview real scenarios on your actual site with live data.
Zero Risk to Data
Read-only to your systems of record. Production and staging data stay untouched.
Skip the Engineering Queue
PMs and designers simulate changes themselves. No tickets, no waiting, no staging deploys.
One line to unlock simulation
Point your API calls through Stage. Everything else stays the same.
'https://gateway.usestage.dev/gw/YOUR_KEY/cms/products',
{ headers: { "X-Scenario": "spring-promo" } }
)
Stop imagining. Start simulating.
See exactly how your site would behave with different data — no database changes, no risky deploys.
Start Free