> ## Documentation Index
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# PFEntityKey C API

> PFEntityKey data model in the PlayFab C SDK: a combined entity type and ID structure that uniquely identifies a single PlayFab entity in API calls.

PFEntityKey data model. Combined entity type and ID structure which uniquely identifies a single entity.

## Syntax

```cpp theme={null}
typedef struct PFEntityKey {  
    const char* id;  
    const char* type;  
} PFEntityKey;  
```

### Members

**`id`**   const char\*\
*is null-terminated*

Unique ID of the entity.

**`type`**   const char\*\
*is null-terminated*

(Optional) Entity type. See [/playfab/live-service-management/game-configuration/entities/available-built-in-entity-types.](/services/playfab/live-service-management/game-configuration/entities/available-built-in-entity-types)

## Requirements

**Header:** PFTypes.h

## See also

[PFTypes members](/services/playfab/api-references/c/pftypes/pftypes_members)


## Related topics

- [PFEntityKey](/services/playfab/multiplayer/lobby/unity-multiplayer-api-reference/PlayFab.Multiplayer/PFEntityKey/PFEntityKey.md)
- [PFEntityKey.Id](/services/playfab/multiplayer/lobby/unity-multiplayer-api-reference/PlayFab.Multiplayer/PFEntityKey/Id.md)
- [PFEntityKey.Type](/services/playfab/multiplayer/lobby/unity-multiplayer-api-reference/PlayFab.Multiplayer/PFEntityKey/Type.md)
- [PFEntityKey class](/services/playfab/multiplayer/lobby/unity-multiplayer-api-reference/PlayFab.Multiplayer/PFEntityKey/overview.md)
- [PFEntityKey - PlayFab Multiplayer SDK](/services/playfab/multiplayer/lobby/playfabmultiplayerreference-cpp/pfmultiplayer/pfentitykey_clientsdk.md)