curl --request POST \
  --url https://api.hubapi.com/crm-objects/v1/objects/line_items/batch-create

"\nExample POST URL:\nhttps://api.hubapi.com/crm-objects/v1/objects/line_items/batch-create\n\nExample POST JSON (creating two line items):\n[\n  [\n    {\n      \"name\": \"hs_product_id\",\n      \"value\": \"1645342\"\n    },\n    {\n      \"name\": \"quantity\",\n      \"value\": \"25\"\n    },\n    {\n      \"name\": \"name\",\n      \"value\": \"A custom name for the product for this line item.\"\n    }\n  ],\n  [\n    {\n      \"name\": \"hs_product_id\",\n      \"value\": \"1645187\"\n    },\n    {\n      \"name\": \"quantity\",\n      \"value\": \"25\"\n    },\n    {\n      \"name\": \"price\",\n      \"value\": \"9.00\"\n    },\n    {\n      \"name\": \"name\",\n      \"value\": \"Widgets, special discount price\"\n    }\n  ]\n]\n\nExample response:\n[\n  {\n    \"objectType\": \"LINE_ITEM\",\n    \"portalId\": 62515,\n    \"objectId\": 9845651,\n    \"properties\": {\n      \"amount\": {\n        \"versions\": [\n          {\n            \"name\": \"amount\",\n            \"value\": \"687.50\",\n            \"timestamp\": 0,\n            \"sourceId\": \"LineItemAmountCalculator\",\n            \"source\": \"CALCULATED\",\n            \"sourceVid\": []\n          }\n        ],\n        \"value\": \"687.50\",\n        \"timestamp\": 0,\n        \"source\": \"CALCULATED\",\n        \"sourceId\": \"LineItemAmountCalculator\"\n      },\n      \"quantity\": {\n        \"versions\": [\n          {\n            \"name\": \"quantity\",\n            \"value\": \"25\",\n            \"timestamp\": 1525369755209,\n            \"source\": \"API\",\n            \"sourceVid\": []\n          }\n        ],\n        \"value\": \"25\",\n        \"timestamp\": 1525369755209,\n        \"source\": \"API\",\n        \"sourceId\": null\n      },\n      \"hs_lastmodifieddate\": {\n        \"versions\": [\n          {\n            \"name\": \"hs_lastmodifieddate\",\n            \"value\": \"0\",\n            \"timestamp\": 0,\n            \"source\": \"CALCULATED\",\n            \"sourceVid\": []\n          }\n        ],\n        \"value\": \"0\",\n        \"timestamp\": 0,\n        \"source\": \"CALCULATED\",\n        \"sourceId\": null\n      },\n      \"price\": {\n        \"versions\": [\n          {\n            \"name\": \"price\",\n            \"value\": \"27.50\",\n            \"timestamp\": 1525299376761,\n            \"source\": \"API\",\n            \"sourceVid\": []\n          }\n        ],\n        \"value\": \"27.50\",\n        \"timestamp\": 1525299376761,\n        \"source\": \"API\",\n        \"sourceId\": null\n      },\n      \"name\": {\n        \"versions\": [\n          {\n            \"name\": \"name\",\n            \"value\": \"A custom name for the product for this line item.\",\n            \"timestamp\": 1525369755209,\n            \"source\": \"API\",\n            \"sourceVid\": []\n          }\n        ],\n        \"value\": \"A custom name for the product for this line item.\",\n        \"timestamp\": 1525369755209,\n        \"source\": \"API\",\n        \"sourceId\": null\n      },\n      \"createdate\": {\n        \"versions\": [\n          {\n            \"name\": \"createdate\",\n            \"value\": \"0\",\n            \"timestamp\": 0,\n            \"source\": \"API\",\n            \"sourceVid\": []\n          }\n        ],\n        \"value\": \"0\",\n        \"timestamp\": 0,\n        \"source\": \"API\",\n        \"sourceId\": null\n      },\n      \"description\": {\n        \"versions\": [\n          {\n            \"name\": \"description\",\n            \"value\": \"A description of this product.\",\n            \"timestamp\": 1525299376761,\n            \"source\": \"API\",\n            \"sourceVid\": []\n          }\n        ],\n        \"value\": \"A description of this product.\",\n        \"timestamp\": 1525299376761,\n        \"source\": \"API\",\n        \"sourceId\": null\n      },\n      \"hs_product_id\": {\n        \"versions\": [\n          {\n            \"name\": \"hs_product_id\",\n            \"value\": \"1645342\",\n            \"timestamp\": 1525369755209,\n            \"source\": \"API\",\n            \"sourceVid\": []\n          }\n        ],\n        \"value\": \"1645342\",\n        \"timestamp\": 1525369755209,\n        \"source\": \"API\",\n        \"sourceId\": null\n      },\n      \"recurringbillingfrequency\": {\n        \"versions\": [\n          {\n            \"name\": \"recurringbillingfrequency\",\n            \"value\": \"quarterly\",\n            \"timestamp\": 1525299376761,\n            \"source\": \"API\",\n            \"sourceVid\": []\n          }\n        ],\n        \"value\": \"quarterly\",\n        \"timestamp\": 1525299376761,\n        \"source\": \"API\",\n        \"sourceId\": null\n      }\n    },\n    \"version\": 0,\n    \"isDeleted\": false\n  },\n  {\n    \"objectType\": \"LINE_ITEM\",\n    \"portalId\": 62515,\n    \"objectId\": 9867373,\n    \"properties\": {\n      \"amount\": {\n        \"versions\": [\n          {\n            \"name\": \"amount\",\n            \"value\": \"-275.00\",\n            \"timestamp\": 0,\n            \"sourceId\": \"LineItemAmountCalculator\",\n            \"source\": \"CALCULATED\",\n            \"sourceVid\": []\n          }\n        ],\n        \"value\": \"-275.00\",\n        \"timestamp\": 0,\n        \"source\": \"CALCULATED\",\n        \"sourceId\": \"LineItemAmountCalculator\"\n      },\n      \"quantity\": {\n        \"versions\": [\n          {\n            \"name\": \"quantity\",\n            \"value\": \"25\",\n            \"timestamp\": 1525369755209,\n            \"source\": \"API\",\n            \"sourceVid\": []\n          }\n        ],\n        \"value\": \"25\",\n        \"timestamp\": 1525369755209,\n        \"source\": \"API\",\n        \"sourceId\": null\n      },\n      \"hs_lastmodifieddate\": {\n        \"versions\": [\n          {\n            \"name\": \"hs_lastmodifieddate\",\n            \"value\": \"0\",\n            \"timestamp\": 0,\n            \"source\": \"CALCULATED\",\n            \"sourceVid\": []\n          }\n        ],\n        \"value\": \"0\",\n        \"timestamp\": 0,\n        \"source\": \"CALCULATED\",\n        \"sourceId\": null\n      },\n      \"price\": {\n        \"versions\": [\n          {\n            \"name\": \"price\",\n            \"value\": \"9.00\",\n            \"timestamp\": 1525369755209,\n            \"source\": \"API\",\n            \"sourceVid\": []\n          }\n        ],\n        \"value\": \"9.00\",\n        \"timestamp\": 1525369755209,\n        \"source\": \"API\",\n        \"sourceId\": null\n      },\n      \"name\": {\n        \"versions\": [\n          {\n            \"name\": \"name\",\n            \"value\": \"Widgets, special discount price\",\n            \"timestamp\": 1525369755209,\n            \"source\": \"API\",\n            \"sourceVid\": []\n          }\n        ],\n        \"value\": \"Widgets, special discount price\",\n        \"timestamp\": 1525369755209,\n        \"source\": \"API\",\n        \"sourceId\": null\n      },\n      \"createdate\": {\n        \"versions\": [\n          {\n            \"name\": \"createdate\",\n            \"value\": \"0\",\n            \"timestamp\": 0,\n            \"source\": \"API\",\n            \"sourceVid\": []\n          }\n        ],\n        \"value\": \"0\",\n        \"timestamp\": 0,\n        \"source\": \"API\",\n        \"sourceId\": null\n      },\n      \"discount\": {\n        \"versions\": [\n          {\n            \"name\": \"discount\",\n            \"value\": \"20\",\n            \"timestamp\": 1525292253568,\n            \"source\": \"API\",\n            \"sourceVid\": []\n          }\n        ],\n        \"value\": \"20\",\n        \"timestamp\": 1525292253568,\n        \"source\": \"API\",\n        \"sourceId\": null\n      },\n      \"description\": {\n        \"versions\": [\n          {\n            \"name\": \"description\",\n            \"value\": \"A description of yet another product.\",\n            \"timestamp\": 1525289943771,\n            \"source\": \"API\",\n            \"sourceVid\": []\n          }\n        ],\n        \"value\": \"A description of yet another product.\",\n        \"timestamp\": 1525289943771,\n        \"source\": \"API\",\n        \"sourceId\": null\n      },\n      \"hs_product_id\": {\n        \"versions\": [\n          {\n            \"name\": \"hs_product_id\",\n            \"value\": \"1645187\",\n            \"timestamp\": 1525369755209,\n            \"source\": \"API\",\n            \"sourceVid\": []\n          }\n        ],\n        \"value\": \"1645187\",\n        \"timestamp\": 1525369755209,\n        \"source\": \"API\",\n        \"sourceId\": null\n      },\n      \"recurringbillingfrequency\": {\n        \"versions\": [\n          {\n            \"name\": \"recurringbillingfrequency\",\n            \"value\": \"annually\",\n            \"timestamp\": 1525289943771,\n            \"source\": \"API\",\n            \"sourceVid\": []\n          }\n        ],\n        \"value\": \"annually\",\n        \"timestamp\": 1525289943771,\n        \"source\": \"API\",\n        \"sourceId\": null\n      }\n    },\n    \"version\": 0,\n    \"isDeleted\": false\n  }\n]"