## MedplumClientOptions.clientId property

The client ID.

Client ID can be used for SMART-on-FHIR customization.

**Signature:**

```typescript
clientId?: string;
```  
- [MedplumClientOptions.clientId property](/content/docs/sdk/core.medplumclientoptions.clientid#medplumclientoptionsclientid-property/index.html)