Bulk "import into pipeline": upsert contacts and create one deal per row. Throttled generously so a chunked multi-batch import can complete.

curl --request POST \
  --url https://api.example.com/crm/deals/bulk-import \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "rows": [
    {
      "firstName": "<string>",
      "lastName": "<string>",
      "email": "jsmith@example.com",
      "phoneNumber": "<string>",
      "tags": [
        "<string>"
      ],
      "notes": "<string>",
      "accountOwnerEmail": "jsmith@example.com",
      "meetingTypeRef": "<string>",
      "crmCompanyRef": "<string>",
      "additionalData": {},
      "dealName": "<string>",
      "dealValue": 1,
      "dealCurrency": "<string>",
      "dealExpectedCloseDate": "<string>",
      "dealOwnerEmail": "jsmith@example.com",
      "dealNotes": "<string>"
    }
  ],
  "pipelineId": "<string>",
  "stageId": "<string>",
  "updateExisting": true
}
'

import requests

url = "https://api.example.com/crm/deals/bulk-import"

payload = {
    "rows": [
        {
            "firstName": "<string>",
            "lastName": "<string>",
            "email": "jsmith@example.com",
            "phoneNumber": "<string>",
            "tags": ["<string>"],
            "notes": "<string>",
            "accountOwnerEmail": "jsmith@example.com",
            "meetingTypeRef": "<string>",
            "crmCompanyRef": "<string>",
            "additionalData": {},
            "dealName": "<string>",
            "dealValue": 1,
            "dealCurrency": "<string>",
            "dealExpectedCloseDate": "<string>",
            "dealOwnerEmail": "jsmith@example.com",
            "dealNotes": "<string>"
        }
    ],
    "pipelineId": "<string>",
    "stageId": "<string>",
    "updateExisting": True
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    rows: [
      {
        firstName: '<string>',
        lastName: '<string>',
        email: 'jsmith@example.com',
        phoneNumber: '<string>',
        tags: ['<string>'],
        notes: '<string>',
        accountOwnerEmail: 'jsmith@example.com',
        meetingTypeRef: '<string>',
        crmCompanyRef: '<string>',
        additionalData: {},
        dealName: '<string>',
        dealValue: 1,
        dealCurrency: '<string>',
        dealExpectedCloseDate: '<string>',
        dealOwnerEmail: 'jsmith@example.com',
        dealNotes: '<string>'
      }
    ],
    pipelineId: '<string>',
    stageId: '<string>',
    updateExisting: true
  })
};

fetch('https://api.example.com/crm/deals/bulk-import', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.example.com/crm/deals/bulk-import",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'rows' => [
        [
                'firstName' => '<string>',
                'lastName' => '<string>',
                'email' => 'jsmith@example.com',
                'phoneNumber' => '<string>',
                'tags' => [
                                '<string>'
                ],
                'notes' => '<string>',
                'accountOwnerEmail' => 'jsmith@example.com',
                'meetingTypeRef' => '<string>',
                'crmCompanyRef' => '<string>',
                'additionalData' => [
                                
                ],
                'dealName' => '<string>',
                'dealValue' => 1,
                'dealCurrency' => '<string>',
                'dealExpectedCloseDate' => '<string>',
                'dealOwnerEmail' => 'jsmith@example.com',
                'dealNotes' => '<string>'
        ]
    ],
    'pipelineId' => '<string>',
    'stageId' => '<string>',
    'updateExisting' => true
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.example.com/crm/deals/bulk-import"

	payload := strings.NewReader("{\n  \"rows\": [\n    {\n      \"firstName\": \"<string>\",\n      \"lastName\": \"<string>\",\n      \"email\": \"jsmith@example.com\",\n      \"phoneNumber\": \"<string>\",\n      \"tags\": [\n        \"<string>\"\n      ],\n      \"notes\": \"<string>\",\n      \"accountOwnerEmail\": \"jsmith@example.com\",\n      \"meetingTypeRef\": \"<string>\",\n      \"crmCompanyRef\": \"<string>\",\n      \"additionalData\": {},\n      \"dealName\": \"<string>\",\n      \"dealValue\": 1,\n      \"dealCurrency\": \"<string>\",\n      \"dealExpectedCloseDate\": \"<string>\",\n      \"dealOwnerEmail\": \"jsmith@example.com\",\n      \"dealNotes\": \"<string>\"\n    }\n  ],\n  \"pipelineId\": \"<string>\",\n  \"stageId\": \"<string>\",\n  \"updateExisting\": true\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.example.com/crm/deals/bulk-import")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"rows\": [\n    {\n      \"firstName\": \"<string>\",\n      \"lastName\": \"<string>\",\n      \"email\": \"jsmith@example.com\",\n      \"phoneNumber\": \"<string>\",\n      \"tags\": [\n        \"<string>\"\n      ],\n      \"notes\": \"<string>\",\n      \"accountOwnerEmail\": \"jsmith@example.com\",\n      \"meetingTypeRef\": \"<string>\",\n      \"crmCompanyRef\": \"<string>\",\n      \"additionalData\": {},\n      \"dealName\": \"<string>\",\n      \"dealValue\": 1,\n      \"dealCurrency\": \"<string>\",\n      \"dealExpectedCloseDate\": \"<string>\",\n      \"dealOwnerEmail\": \"jsmith@example.com\",\n      \"dealNotes\": \"<string>\"\n    }\n  ],\n  \"pipelineId\": \"<string>\",\n  \"stageId\": \"<string>\",\n  \"updateExisting\": true\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.example.com/crm/deals/bulk-import")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"rows\": [\n    {\n      \"firstName\": \"<string>\",\n      \"lastName\": \"<string>\",\n      \"email\": \"jsmith@example.com\",\n      \"phoneNumber\": \"<string>\",\n      \"tags\": [\n        \"<string>\"\n      ],\n      \"notes\": \"<string>\",\n      \"accountOwnerEmail\": \"jsmith@example.com\",\n      \"meetingTypeRef\": \"<string>\",\n      \"crmCompanyRef\": \"<string>\",\n      \"additionalData\": {},\n      \"dealName\": \"<string>\",\n      \"dealValue\": 1,\n      \"dealCurrency\": \"<string>\",\n      \"dealExpectedCloseDate\": \"<string>\",\n      \"dealOwnerEmail\": \"jsmith@example.com\",\n      \"dealNotes\": \"<string>\"\n    }\n  ],\n  \"pipelineId\": \"<string>\",\n  \"stageId\": \"<string>\",\n  \"updateExisting\": true\n}"

response = http.request(request)
puts response.read_body

{
  "contactsCreated": 123,
  "contactsUpdated": 123,
  "contactsSkipped": 123,
  "dealsCreated": 123,
  "dealsSkipped": 123,
  "failed": 123,
  "issues": [
    {}
  ]
}

{
  "statusCode": 400,
  "message": [
    "limit must not be greater than 100"
  ],
  "error": "BadRequestException"
}

{
  "statusCode": 400,
  "message": [
    "limit must not be greater than 100"
  ],
  "error": "BadRequestException"
}

{
  "statusCode": 400,
  "message": [
    "limit must not be greater than 100"
  ],
  "error": "BadRequestException"
}

{
  "statusCode": 400,
  "message": [
    "limit must not be greater than 100"
  ],
  "error": "BadRequestException"
}