curl --request GET \
  --url https://api.tagdeliver.com/v1/billing/invoice/{id} \
  --header 'Authorization: Bearer <token>'

{
  "result": {
    "id": 3667,
    "organisation_id": 3,
    "liable_org": null,
    "user_id": null,
    "type": null,
    "status": "GENERATED",
    "date_generated": "2025-11-01 06:30:01",
    "date_due": "2025-11-30 00:00:00",
    "date_start": "2025-10-01",
    "date_end": "2025-10-31",
    "base_amount": 72502.07,
    "base_sub_amount": 72502.07,
    "base_currency": "GBP",
    "target_amount": null,
    "target_currency": "GBP",
    "target_rate": null,
    "tax": 0,
    "tax_id": null,
    "notes": null,
    "name": "DEMO",
    "org_name": "DEMO",
    "country": null,
    "gcm": 1,
    "items": [
      {
        "id": 19872,
        "title": "UID 18620 - example.com",
        "description": "225,773,248 impressions",
        "quantity": 1,
        "amount": 72502.07,
        "chargeable": true
      }
    ]
  },
  "success": true
}