---
title: "Timestamp parameter"
description: "Learn more about Timestamp parameter in this Ordering API guide for developers integrating the platform."
canonical: https://docs.ordering.co/api-reference/guides/timestamp-parameter/
---

# Timestamp parameter

Some read operations accept a `timestamp` query parameter to evaluate schedule-dependent businesses, categories, products, banners, offers, or cart suggestions at a requested moment instead of the current time.

Where the operation documents `timestamp` as an integer, send a Unix timestamp in seconds:

```text
GET https://api.ordering.co/v400/en/YOUR_PROJECT/business/41?timestamp=1581444000
```

A Unix timestamp identifies one instant. The API applies the relevant business timezone when it evaluates local schedules.

Use `timestamp` only when the specific operation lists it, and follow the type shown for that operation. It is not a universal query parameter, and the legacy `timesmtap` spelling is invalid. Query parameters begin with `?`; use `&` only to add another parameter after the first one.