# Query Parameter Search

In order to make a search to find out what facilities are available around you and when (we refer to the "when" as "slots"), you **must use** mandatory query parameters *and* **can use** optional query parameters.

{% hint style="success" %}
Regarding provision of slots via the API, there are four options available:

**i)`discovery-geo` query parameter search = multiple facilities + multiple days + no slots.**

**ii)`upcoming-slots` query parameter search = multiple facilities + one day + slots.**

iii)`FacilityUse ByID`search = one facility + multiple days + slots.

iv)`Slot ByID` search = one facility + one day + one slot.
{% endhint %}

{% hint style="danger" %}
**`discovery-geo` query parameter search = multiple facilities + multiple days + no slots.**
{% endhint %}