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title: Extensions
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[Registrar Sandbox](https://developers.cloudflare.com/api/resources/registrar%5Fsandbox)

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# Extensions

##### [List extensions](https://developers.cloudflare.com/api/resources/registrar%5Fsandbox/subresources/extensions/methods/list)

GET/accounts/{account\_id}/registrar-sandbox/extensions

##### [Get extension](https://developers.cloudflare.com/api/resources/registrar%5Fsandbox/subresources/extensions/methods/get)

GET/accounts/{account\_id}/registrar-sandbox/extensions/{extension}

##### ModelsExpand Collapse 

ExtensionListResponse object { metadata, registration\_schema } 

Extension entry with metadata and JSON Schema documents for the registration operation.

metadata: object { name, tld } 

Extension metadata.

name: string

The full name of the extension. For example, “co.uk”, or “uk”.

tld: string

The TLD of the extension. For example, for “co.uk”, it is “uk”. For “uk”, it is “uk”.

registration\_schema: unknown

JSON Schema describing the expected input structure for registration operations on this extension.

ExtensionGetResponse object { metadata, registration\_schema } 

Extension entry with metadata and JSON Schema documents for the registration operation.

metadata: object { name, tld } 

Extension metadata.

name: string

The full name of the extension. For example, “co.uk”, or “uk”.

tld: string

The TLD of the extension. For example, for “co.uk”, it is “uk”. For “uk”, it is “uk”.

registration\_schema: unknown

JSON Schema describing the expected input structure for registration operations on this extension.