# FX rate

The `FxRate` family — 5 operations.

An FX rate is a dated exchange window between two currencies — absolute buy and sell rates at group level, with adjust and par overrides per organization or logical facility. A window is immutable once effective: supersede it with a new one; doom only cancels a future window.

## Operations

| Operation | Kind | What it does |
| --- | --- | --- |
| [createFxRate](/reference/fx-rate/createFxRate/) | mutation | Create a new foreign-exchange rate your tills use for foreign cash at your organization. |
| [doomFxRate](/reference/fx-rate/doomFxRate/) | mutation | Permanently retire a foreign-exchange rate your tills use for foreign cash. |
| [fxRate](/reference/fx-rate/fxRate/) | query | Look up one record — a foreign-exchange rate your tills use for foreign cash. |
| [fxRates](/reference/fx-rate/fxRates/) | query | The fx rate list — each entry is a foreign-exchange rate your tills use for foreign cash. |
| [updateFxRate](/reference/fx-rate/updateFxRate/) | mutation | Edit a foreign-exchange rate your tills use for foreign cash — change its details. |