What responses does the API return?

Code
Scenario
200 Success
The request was processed successfully.
201 Created
One (or multiple) resources were created.
400 Bad Request 
Cannot process request due to client error.
401 Unauthorised
Invalid bearer token provided.
404 Not Found
Endpoint not found.
422 Unprocessable Content
Payload failed validation.
500 Internal Server Error
Examples
200 Success
GET /api/orders/{id}
{
    "reference": "ABC123",
    "email": "acme@aerocommerce.com",
    "subtotal": {
        "amount": 84166.67,
        "tax": 16833.33
    },
    "shipping": {
        "amount": 83.33,
        "tax": 16.67
    },
    "discount": {
        "amount": 8416.67,
        "tax": 1683.33
    },
    "surcharge": {
        "amount": 0,
        "tax": 0
    },
    "ordered_at": "2023-09-01T09:29:41.000000Z",
    "deliver_on": null,
    "currency": "GBP",
    "status": {
        "id": 3,
        "name": "Successful",
        "state": "successful"
    },
    "customer": {
        "id": 1,
        "name": "Acme",
        "email": "acme@aerocommerce.com"
    },
    "shipping_method": {
        "id": 1,
        "name": "Standard"
    },
    "billing_address": {
        "id": 1,
        "first_name": "Aero",
        "last_name": "Commerce",
        "company": "Aero Commerce",
        "mobile": null,
        "phone": null,
        "line_1": "28-32 Albert Rd",
        "line_2": null,
        "city": "Middlesbrough",
        "zone": null,
        "postcode": "TS1 1QD",
        "reference": null,
        "country": "GB",
        "eori_number": null
    },
    "shipping_address": {
        "id": 1,
        "first_name": "Aero",
        "last_name": "Commerce",
        "company": "Aero Commerce",
        "mobile": null,
        "phone": null,
        "line_1": "28-32 Albert Rd",
        "line_2": null,
        "city": "Middlesbrough",
        "zone": null,
        "postcode": "TS1 1QD",
        "reference": null,
        "country": "GB",
        "eori_number": null
    },
    "items": [
        {
            "id": 1,
            "name": "Test",
            "sku": "TEST-S",
            "product_id": 4,
            "variant_id": 14,
            "shippable": true,
            "quantity": 2,
            "price": {
                "amount": 42083.33,
                "tax": 8416.67
            },
            "discount": {
                "amount": 8416.67,
                "tax": 1683.33
            },
            "full_price": {
                "amount": 42083.33,
                "tax": 8416.67
            },
            "weight": 0,
            "volume": 0
        }
    ]
}
201 Created
POS /api/orders
{
    "order": {
        "id": 15
    }
}
400 Bad Request
GET /api/orders/{id}
{
    "message": "Missing order ID"
}
401 Unauthorised
GET /api/orders/{id}
{
    "message": "Unauthorized: Bearer token missing."
}
404 Not Found
GET /api/orders/{id}
{
    "message": "The requested order with ID {id} could not be found."
}
422 Unprocessable Content
POST /api/orders
{
    "message": "The given data was invalid.",
    "errors": {
        "currency": ["The currency field is required."]
    }
}
500 Internal Server Error
{
    "message": "Exception message..."
}