Here’s an example for an attribute called Sample Attribute (unsearchable)
POST https://{{org}}.api.identitynow.com/cc/api/identityAttribute/create
Content-Type: application/json
Body: {“displayName”:“Sample Attribute”,“multiValued”:false,“namedColumn”:false,“searchable”:false,“silent”:false,“standard”:false,“system”:false,“sources”:[{“properties”:{“ruleName”:“Cloud Promote Identity Attribute”},“type”:“rule”}],“name”:“sampleAttribute”,“type”:“string”}