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Go / ShipEngine Walkthrough / Create a return label

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    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    http := chilkat.NewHttp()
    var success bool

    // Use this online tool to generate code from sample JSON: Generate Code to Create JSON

    // The following JSON is sent in the request body.

    // {
    //   "is_return_label": true,
    //   "rma_number": "123456789",
    //   "shipment": {
    //     "service_code": "usps_priority_mail",
    //     "ship_from": {
    //       "name": "Amanda Miller",
    //       "address_line1": "525 S Winchester Blvd",
    //       "city_locality": "San Jose",
    //       "state_province": "CA",
    //       "postal_code": "95128",
    //       "country_code": "US"
    //     },
    //     "ship_to": {
    //       "company_name": "Example Corp.",
    //       "address_line1": "4009 Marathon Blvd",
    //       "city_locality": "Austin",
    //       "state_province": "TX",
    //       "postal_code": "78756",
    //       "country_code": "US",
    //       "phone": "512-555-5555"
    //     },
    //     "packages": [
    //       {
    //         "weight": {
    //           "value": 17,
    //           "unit": "pound"
    //         },
    //         "dimensions": {
    //           "length": 36,
    //           "width": 12,
    //           "height": 24,
    //           "unit": "inch"
    //         }
    //       }
    //     ]
    //   }
    // }

    json := chilkat.NewJsonObject()
    json.UpdateBool("is_return_label",true)
    json.UpdateString("rma_number","123456789")
    json.UpdateString("shipment.service_code","usps_priority_mail")
    json.UpdateString("shipment.ship_from.name","Amanda Miller")
    json.UpdateString("shipment.ship_from.address_line1","525 S Winchester Blvd")
    json.UpdateString("shipment.ship_from.city_locality","San Jose")
    json.UpdateString("shipment.ship_from.state_province","CA")
    json.UpdateString("shipment.ship_from.postal_code","95128")
    json.UpdateString("shipment.ship_from.country_code","US")
    json.UpdateString("shipment.ship_to.company_name","Example Corp.")
    json.UpdateString("shipment.ship_to.address_line1","4009 Marathon Blvd")
    json.UpdateString("shipment.ship_to.city_locality","Austin")
    json.UpdateString("shipment.ship_to.state_province","TX")
    json.UpdateString("shipment.ship_to.postal_code","78756")
    json.UpdateString("shipment.ship_to.country_code","US")
    json.UpdateString("shipment.ship_to.phone","512-555-5555")
    json.UpdateInt("shipment.packages[0].weight.value",17)
    json.UpdateString("shipment.packages[0].weight.unit","pound")
    json.UpdateInt("shipment.packages[0].dimensions.length",36)
    json.UpdateInt("shipment.packages[0].dimensions.width",12)
    json.UpdateInt("shipment.packages[0].dimensions.height",24)
    json.UpdateString("shipment.packages[0].dimensions.unit","inch")

    http.SetRequestHeader("API-Key","{{API_KEY}}")
    http.SetRequestHeader("Content-Type","application/json")

    resp := http.PostJson3("https://api.shipengine.com/v1/labels","application/json",json)
    if http.LastMethodSuccess() == false {
        fmt.Println(http.LastErrorText())
        http.DisposeHttp()
        json.DisposeJsonObject()
        return
    }

    sbResponseBody := chilkat.NewStringBuilder()
    resp.GetBodySb(sbResponseBody)

    jResp := chilkat.NewJsonObject()
    jResp.LoadSb(sbResponseBody)
    jResp.SetEmitCompact(false)

    fmt.Println("Response Body:")
    fmt.Println(*jResp.Emit())

    respStatusCode := resp.StatusCode()
    fmt.Println("Response Status Code = ", respStatusCode)
    if respStatusCode >= 400 {
        fmt.Println("Response Header:")
        fmt.Println(resp.Header())
        fmt.Println("Failed.")
        resp.DisposeHttpResponse()
        http.DisposeHttp()
        json.DisposeJsonObject()
        sbResponseBody.DisposeStringBuilder()
        jResp.DisposeJsonObject()
        return
    }

    resp.DisposeHttpResponse()

    // Sample JSON response:
    // (Sample code for parsing the JSON response is shown below)

    // {
    //   "label_id": "se-1382827",
    //   "status": "completed",
    //   "shipment_id": "se-4151872",
    //   "ship_date": "2019-09-18T00:00:00Z",
    //   "created_at": "2019-09-18T13:55:37.0247767Z",
    //   "shipment_cost": {
    //     "currency": "usd",
    //     "amount": 98.14
    //   },
    //   "insurance_cost": {
    //     "currency": "usd",
    //     "amount": 0
    //   },
    //   "tracking_number": "9405511899564298878259",
    //   "is_return_label": true,
    //   "rma_number": "123456789",
    //   "is_international": false,
    //   "batch_id": "",
    //   "carrier_id": "se-121861",
    //   "service_code": "usps_priority_mail",
    //   "package_code": "package",
    //   "voided": false,
    //   "voided_at": null,
    //   "label_format": "pdf",
    //   "label_layout": "4x6",
    //   "trackable": true,
    //   "carrier_code": "stamps_com",
    //   "tracking_status": "in_transit",
    //   "label_download": {
    //     "pdf": "https://api.shipengine.com/v1/downloads/10/XksbpgC37Um_NGiv4Qf_GA/label-1382827.pdf",
    //     "png": "https://api.shipengine.com/v1/downloads/10/XksbpgC37Um_NGiv4Qf_GA/label-1382827.png",
    //     "zpl": "https://api.shipengine.com/v1/downloads/10/XksbpgC37Um_NGiv4Qf_GA/label-1382827.zpl",
    //     "href": "https://api.shipengine.com/v1/downloads/10/XksbpgC37Um_NGiv4Qf_GA/label-1382827.pdf"
    //   },
    //   "form_download": null,
    //   "insurance_claim": null,
    //   "packages": [
    //     {
    //       "package_code": "package",
    //       "weight": {
    //         "value": 17,
    //         "unit": "pound"
    //       },
    //       "dimensions": {
    //         "unit": "inch",
    //         "length": 36,
    //         "width": 12,
    //         "height": 24
    //       },
    //       "insured_value": {
    //         "currency": "usd",
    //         "amount": 0
    //       },
    //       "tracking_number": "9405511899564298878259",
    //       "label_messages": {
    //         "reference1": null,
    //         "reference2": null,
    //         "reference3": null
    //       },
    //       "external_package_id": null
    //     }
    //   ]
    // }

    // Sample code for parsing the JSON response...
    // Use this online tool to generate parsing code from sample JSON: Generate JSON Parsing Code

    var Value int
    var Unit *string = new(string)
dimensions    var Unit *string = new(string)
    var Length int
    var Width int
    var Height int
    var insured_valueCurrency *string = new(string)
    var insured_valueAmount int
    var Reference1 *string = new(string)
    var Reference2 *string = new(string)
    var Reference3 *string = new(string)
    var external_package_id *string = new(string)

    label_id := jResp.StringOf("label_id")
    status := jResp.StringOf("status")
    shipment_id := jResp.StringOf("shipment_id")
    ship_date := jResp.StringOf("ship_date")
    created_at := jResp.StringOf("created_at")
    v_Currency := jResp.StringOf("shipment_cost.currency")
    Amount := jResp.StringOf("shipment_cost.amount")
    insurance_costCurrency := jResp.StringOf("insurance_cost.currency")
    insurance_costAmount := jResp.IntOf("insurance_cost.amount")
    tracking_number := jResp.StringOf("tracking_number")
    is_return_label := jResp.BoolOf("is_return_label")
    rma_number := jResp.StringOf("rma_number")
    is_international := jResp.BoolOf("is_international")
    batch_id := jResp.StringOf("batch_id")
    carrier_id := jResp.StringOf("carrier_id")
    service_code := jResp.StringOf("service_code")
    package_code := jResp.StringOf("package_code")
    voided := jResp.BoolOf("voided")
    voided_at := jResp.StringOf("voided_at")
    label_format := jResp.StringOf("label_format")
    label_layout := jResp.StringOf("label_layout")
    trackable := jResp.BoolOf("trackable")
    carrier_code := jResp.StringOf("carrier_code")
    tracking_status := jResp.StringOf("tracking_status")
    v_Pdf := jResp.StringOf("label_download.pdf")
    Png := jResp.StringOf("label_download.png")
    Zpl := jResp.StringOf("label_download.zpl")
    Href := jResp.StringOf("label_download.href")
    form_download := jResp.StringOf("form_download")
    insurance_claim := jResp.StringOf("insurance_claim")
    i := 0
    count_i := jResp.SizeOfArray("packages")
    for i < count_i {
        jResp.SetI(i)
        package_code = jResp.StringOf("packages[i].package_code")
        Value = jResp.IntOf("packages[i].weight.value")
        Unit = jResp.StringOf("packages[i].weight.unit")
        dimensionsUnit = jResp.StringOf("packages[i].dimensions.unit")
        Length = jResp.IntOf("packages[i].dimensions.length")
        Width = jResp.IntOf("packages[i].dimensions.width")
        Height = jResp.IntOf("packages[i].dimensions.height")
        insured_valueCurrency = jResp.StringOf("packages[i].insured_value.currency")
        insured_valueAmount = jResp.IntOf("packages[i].insured_value.amount")
        tracking_number = jResp.StringOf("packages[i].tracking_number")
        Reference1 = jResp.StringOf("packages[i].label_messages.reference1")
        Reference2 = jResp.StringOf("packages[i].label_messages.reference2")
        Reference3 = jResp.StringOf("packages[i].label_messages.reference3")
        external_package_id = jResp.StringOf("packages[i].external_package_id")
        i = i + 1
    }


    http.DisposeHttp()
    json.DisposeJsonObject()
    sbResponseBody.DisposeStringBuilder()
    jResp.DisposeJsonObject()

Curl Command

curl -X POST
	-H "API-Key: {{API_KEY}}"
	-H "Content-Type: application/json"
	-d '{
	"is_return_label": true,
	"rma_number": "123456789",
	"shipment": {
		"service_code": "usps_priority_mail",
		"ship_from": {
			"name": "Amanda Miller",
			"address_line1": "525 S Winchester Blvd",
			"city_locality": "San Jose",
			"state_province": "CA",
			"postal_code": "95128",
			"country_code": "US"
		},
		"ship_to": {
			"company_name": "Example Corp.",
			"address_line1": "4009 Marathon Blvd",
			"city_locality": "Austin",
			"state_province": "TX",
			"postal_code": "78756",
			"country_code": "US",
			"phone": "512-555-5555"
		},
		"packages": [
			{
				"weight": {
					"value": 17,
					"unit": "pound"
				},
				"dimensions": {
					"length": 36,
					"width": 12,
					"height": 24,
					"unit": "inch"
				}
			}
		]
	}
}'
https://api.shipengine.com/v1/labels

Postman Collection Item JSON

{
  "name": "Create a return label",
  "event": [
    {
      "listen": "test",
      "script": {
        "exec": [
          ""
        ],
        "type": "text/javascript"
      }
    }
  ],
  "request": {
    "method": "POST",
    "header": [
      {
        "key": "Content-Type",
        "name": "Content-Type",
        "type": "text",
        "value": "application/json"
      }
    ],
    "body": {
      "mode": "raw",
      "raw": "{\n\t\"is_return_label\": true,\n\t\"rma_number\": \"123456789\",\n\t\"shipment\": {\n\t\t\"service_code\": \"usps_priority_mail\",\n\t\t\"ship_from\": {\n\t\t\t\"name\": \"Amanda Miller\",\n\t\t\t\"address_line1\": \"525 S Winchester Blvd\",\n\t\t\t\"city_locality\": \"San Jose\",\n\t\t\t\"state_province\": \"CA\",\n\t\t\t\"postal_code\": \"95128\",\n\t\t\t\"country_code\": \"US\"\n\t\t},\n\t\t\"ship_to\": {\n\t\t\t\"company_name\": \"Example Corp.\",\n\t\t\t\"address_line1\": \"4009 Marathon Blvd\",\n\t\t\t\"city_locality\": \"Austin\",\n\t\t\t\"state_province\": \"TX\",\n\t\t\t\"postal_code\": \"78756\",\n\t\t\t\"country_code\": \"US\",\n\t\t\t\"phone\": \"512-555-5555\"\n\t\t},\n\t\t\"packages\": [\n\t\t\t{\n\t\t\t\t\"weight\": {\n\t\t\t\t\t\"value\": 17,\n\t\t\t\t\t\"unit\": \"pound\"\n\t\t\t\t},\n\t\t\t\t\"dimensions\": {\n\t\t\t\t\t\"length\": 36,\n\t\t\t\t\t\"width\": 12,\n\t\t\t\t\t\"height\": 24,\n\t\t\t\t\t\"unit\": \"inch\"\n\t\t\t\t}\n\t\t\t}\n\t\t]\n\t}\n}"
    },
    "url": {
      "raw": "https://api.shipengine.com/v1/labels",
      "protocol": "https",
      "host": [
        "api",
        "shipengine",
        "com"
      ],
      "path": [
        "v1",
        "labels"
      ]
    },
    "description": "Return labels are created just like outgoing labels, but with an additional `is_return_label` flag. You can also optionally specify an `rma_number` (Return Merchandise Authorization)"
  },
  "response": [
    {
      "name": "Create a return label",
      "originalRequest": {
        "method": "POST",
        "header": [
          {
            "key": "Content-Type",
            "name": "Content-Type",
            "type": "text",
            "value": "application/json"
          }
        ],
        "body": {
          "mode": "raw",
          "raw": "{\n\t\"is_return_label\": true,\n\t\"rma_number\": \"123456789\",\n\t\"shipment\": {\n\t\t\"service_code\": \"usps_priority_mail\",\n\t\t\"ship_from\": {\n\t\t\t\"name\": \"Amanda Miller\",\n\t\t\t\"address_line1\": \"525 S Winchester Blvd\",\n\t\t\t\"city_locality\": \"San Jose\",\n\t\t\t\"state_province\": \"CA\",\n\t\t\t\"postal_code\": \"95128\",\n\t\t\t\"country_code\": \"US\"\n\t\t},\n\t\t\"ship_to\": {\n\t\t\t\"company_name\": \"Example Corp.\",\n\t\t\t\"address_line1\": \"4009 Marathon Blvd\",\n\t\t\t\"city_locality\": \"Austin\",\n\t\t\t\"state_province\": \"TX\",\n\t\t\t\"postal_code\": \"78756\",\n\t\t\t\"country_code\": \"US\",\n\t\t\t\"phone\": \"512-555-5555\"\n\t\t},\n\t\t\"packages\": [\n\t\t\t{\n\t\t\t\t\"weight\": {\n\t\t\t\t\t\"value\": 17,\n\t\t\t\t\t\"unit\": \"pound\"\n\t\t\t\t},\n\t\t\t\t\"dimensions\": {\n\t\t\t\t\t\"length\": 36,\n\t\t\t\t\t\"width\": 12,\n\t\t\t\t\t\"height\": 24,\n\t\t\t\t\t\"unit\": \"inch\"\n\t\t\t\t}\n\t\t\t}\n\t\t]\n\t}\n}",
          "options": {
            "raw": {
              "language": "json"
            }
          }
        },
        "url": {
          "raw": "https://api.shipengine.com/v1/labels",
          "protocol": "https",
          "host": [
            "api",
            "shipengine",
            "com"
          ],
          "path": [
            "v1",
            "labels"
          ]
        }
      },
      "status": "OK",
      "code": 200,
      "_postman_previewlanguage": "json",
      "header": [
        {
          "key": "Date",
          "value": "Wed, 18 Sep 2019 13:55:37 GMT"
        },
        {
          "key": "Content-Type",
          "value": "application/json; charset=utf-8"
        },
        {
          "key": "Content-Length",
          "value": "1826"
        },
        {
          "key": "Connection",
          "value": "keep-alive"
        },
        {
          "key": "Access-Control-Allow-Origin",
          "value": "https://www.shipengine.com"
        },
        {
          "key": "Vary",
          "value": "Origin"
        },
        {
          "key": "x-shipengine-requestid",
          "value": "e876812b-185e-432d-ac30-f65a3ff3b3ef"
        }
      ],
      "cookie": [
      ],
      "body": "{\n    \"label_id\": \"se-1382827\",\n    \"status\": \"completed\",\n    \"shipment_id\": \"se-4151872\",\n    \"ship_date\": \"2019-09-18T00:00:00Z\",\n    \"created_at\": \"2019-09-18T13:55:37.0247767Z\",\n    \"shipment_cost\": {\n        \"currency\": \"usd\",\n        \"amount\": 98.14\n    },\n    \"insurance_cost\": {\n        \"currency\": \"usd\",\n        \"amount\": 0\n    },\n    \"tracking_number\": \"9405511899564298878259\",\n    \"is_return_label\": true,\n    \"rma_number\": \"123456789\",\n    \"is_international\": false,\n    \"batch_id\": \"\",\n    \"carrier_id\": \"se-121861\",\n    \"service_code\": \"usps_priority_mail\",\n    \"package_code\": \"package\",\n    \"voided\": false,\n    \"voided_at\": null,\n    \"label_format\": \"pdf\",\n    \"label_layout\": \"4x6\",\n    \"trackable\": true,\n    \"carrier_code\": \"stamps_com\",\n    \"tracking_status\": \"in_transit\",\n    \"label_download\": {\n        \"pdf\": \"https://api.shipengine.com/v1/downloads/10/XksbpgC37Um_NGiv4Qf_GA/label-1382827.pdf\",\n        \"png\": \"https://api.shipengine.com/v1/downloads/10/XksbpgC37Um_NGiv4Qf_GA/label-1382827.png\",\n        \"zpl\": \"https://api.shipengine.com/v1/downloads/10/XksbpgC37Um_NGiv4Qf_GA/label-1382827.zpl\",\n        \"href\": \"https://api.shipengine.com/v1/downloads/10/XksbpgC37Um_NGiv4Qf_GA/label-1382827.pdf\"\n    },\n    \"form_download\": null,\n    \"insurance_claim\": null,\n    \"packages\": [\n        {\n            \"package_code\": \"package\",\n            \"weight\": {\n                \"value\": 17,\n                \"unit\": \"pound\"\n            },\n            \"dimensions\": {\n                \"unit\": \"inch\",\n                \"length\": 36,\n                \"width\": 12,\n                \"height\": 24\n            },\n            \"insured_value\": {\n                \"currency\": \"usd\",\n                \"amount\": 0\n            },\n            \"tracking_number\": \"9405511899564298878259\",\n            \"label_messages\": {\n                \"reference1\": null,\n                \"reference2\": null,\n                \"reference3\": null\n            },\n            \"external_package_id\": null\n        }\n    ]\n}"
    }
  ]
}