action illumidesk_billing_invoice_items_read { label: "Get a specific InvoiceItem." provider: illumidesk method: GET path: "/v1/{namespace}/billing/invoices/{invoice_id}/invoice-items/{id}" encoding: json input: { type: "object" properties: { id: { type: "string" } invoice_id: { type: "string" } namespace: { type: "string" } } required: ["id", "invoice_id", "namespace"] additionalProperties: false } output: { type: "object" additionalProperties: true } }