curl --request GET \
  --url https://api.corebill.io/v1/companies \
  --header 'Authorization: Bearer <token>'

{
  "data": {
    "companies": [
      {
        "id": "com_k8x2m9p4q7w1",
        "name": "Acme Corp",
        "slug": "acme-corp",
        "currency": "USD",
        "invoice_prefix": "INV",
        "quote_prefix": "QUO",
        "logo_url": "https://storage.example.com/logos/acme.png",
        "created_at": "2025-01-15T10:30:00.000Z"
      },
      {
        "id": "com_r3t6y9u2i5o8",
        "name": "Startup Labs",
        "slug": "startup-labs",
        "currency": "EUR",
        "invoice_prefix": "SL",
        "quote_prefix": "SLQ",
        "logo_url": null,
        "created_at": "2025-02-20T14:00:00.000Z"
      }
    ]
  }
}