Single good

To include more than one line item in a transaction, you need to add a transaction line for each good. Here is an example for a single good:

    "transaction": {
        "currency_code": "USD",
        "buyer_name": "Frank Goggins",
        "billing_address": {
            "street_name": "Main street",
            "city": "Big City",
            "country_code": "NZ"
        },
        "location_evidence": {
            "self_declaration": {
                "country_code": "NZ"
            },
            "by_ip_address": {
                "evidence_value": "145.224.110.0"
            }
        },
        "transaction_lines": [
            {
                "product_tax_code": {
                    "class": "VTXD10010"
                },
                "product_class": "D",
                "description": "Acme Video Game",
                "amount": "100",
                "custom_id": ""
            }
        ]
    }
}

Multiple goods on multiple transaction lines

Here is an example for multiple goods with individual transaction lines for each good:

    "transaction": {
        "currency_code": "USD",
        "buyer_name": "Frank Goggins",
        "billing_address": {
            "street_name": "Main street",
            "city": "Big City",
            "country_code": "NZ"
        },
        "location_evidence": {
            "self_declaration": {
                "country_code": "NZ"
            },
            "by_ip_address": {
                "evidence_value": "145.224.110.0"
            }
        },
        "transaction_lines": [
            {
                "product_tax_code": {
                    "class": "VTXD10010"
                },
                "product_class": "D",
                "description": "Video Game 1",
                "amount": "100",
                "custom_id": ""
            },
            {
                "product_tax_code": {
                    "class": "VTXD10010"
                },
                "product_class": "D",
                "description": "Video Game 2",
                "amount": "25",
                "custom_id": ""
            }
        ]
    }
}

Quantity

You can use the quantity field to specify more than one of the same type of good. For example:

    "transaction": {
        "currency_code": "USD",
        "buyer_name": "Frank Goggins",
        "billing_address": {
            "street_name": "Main street",
            "city": "Big City",
            "country_code": "NZ"
        },
        "location_evidence": {
            "self_declaration": {
                "country_code": "NZ"
            },
            "by_ip_address": {
                "evidence_value": "145.224.110.0"
            }
        },
        "transaction_lines": [
            {
                "product_tax_code": {
                    "class": "VTXD10010"
                },
                "product_class": "D",
                "description": "Acme Video Game",
                "amount": "100",
                "quantity":" 5"
                "custom_id": ""
            }
        ]
    }
}