The Assets API exposes fixed asset related functions of the Xero Accounting application and can be used for a variety of purposes such as creating assets, retrieving asset valuations etc.
curl \ -H "Authorization: Bearer $ACCESS_TOKEN" \ https://api.xero.com/assets.xro/1.0/Assets
curl \ -H "Authorization: Bearer $ACCESS_TOKEN" \ https://api.xero.com/assets.xro/1.0/Settings
curl \ -H "Authorization: Bearer $ACCESS_TOKEN" \ https://api.xero.com/assets.xro/1.0/AssetTypes