Yes Assets API can be used in App Builder.An example action snippet for
folder creation below:const token = getBearerToken(params);apiEndpoint =
`${aemEndpoint.value}/api/assets/${params.folderPath}`; const raw =
JSON.stringify({ class: 'assetFolder', properties: { 'jcr:title':
`${params.folderTitle}`, }, }); res = await fetch(apiEndpoint, { method:
'post', headers: { Authorization: `Bearer ${token}`, 'Content-Type':
'application/json', }, body: raw, }); token generation code
snippet:function ge...