Upsert customers

curl --request POST \
  --url https://api.taxwire.com/customers/batch \
  --header 'Content-Type: application/json' \
  --header 'X-API-Key: <api-key>' \
  --data '
{
  "data": [
    {
      "source_id": "CUS-1042",
      "name": "Acme Wholesale Inc.",
      "source_updated_at": "2026-09-15T08:30:00Z"
    },
    {
      "source_id": "CUS-1043",
      "name": "Beta Corp",
      "email": "billing@beta.example",
      "source_updated_at": "2026-09-15T08:29:41Z"
    },
    {
      "name": "Gamma Supply"
    }
  ]
}
'

import requests

url = "https://api.taxwire.com/customers/batch"

payload = { "data": [{
            "source_id": "CUS-1042",
            "name": "Acme Wholesale Inc.",
            "source_updated_at": "2026-09-15T08:30:00Z"
        }, {
            "source_id": "CUS-1043",
            "name": "Beta Corp",
            "email": "billing@beta.example",
            "source_updated_at": "2026-09-15T08:29:41Z"
        }, { "name": "Gamma Supply" }] }
headers = {
    "X-API-Key": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {'X-API-Key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    data: [
      {
        source_id: 'CUS-1042',
        name: 'Acme Wholesale Inc.',
        source_updated_at: '2026-09-15T08:30:00Z'
      },
      {
        source_id: 'CUS-1043',
        name: 'Beta Corp',
        email: 'billing@beta.example',
        source_updated_at: '2026-09-15T08:29:41Z'
      },
      {name: 'Gamma Supply'}
    ]
  })
};

fetch('https://api.taxwire.com/customers/batch', 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.taxwire.com/customers/batch",
  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([
    'data' => [
        [
                'source_id' => 'CUS-1042',
                'name' => 'Acme Wholesale Inc.',
                'source_updated_at' => '2026-09-15T08:30:00Z'
        ],
        [
                'source_id' => 'CUS-1043',
                'name' => 'Beta Corp',
                'email' => 'billing@beta.example',
                'source_updated_at' => '2026-09-15T08:29:41Z'
        ],
        [
                'name' => 'Gamma Supply'
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "X-API-Key: <api-key>"
  ],
]);

$response = curl_exec($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.taxwire.com/customers/batch"

	payload := strings.NewReader("{\n  \"data\": [\n    {\n      \"source_id\": \"CUS-1042\",\n      \"name\": \"Acme Wholesale Inc.\",\n      \"source_updated_at\": \"2026-09-15T08:30:00Z\"\n    },\n    {\n      \"source_id\": \"CUS-1043\",\n      \"name\": \"Beta Corp\",\n      \"email\": \"billing@beta.example\",\n      \"source_updated_at\": \"2026-09-15T08:29:41Z\"\n    },\n    {\n      \"name\": \"Gamma Supply\"\n    }\n  ]\n}")

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

	req.Header.Add("X-API-Key", "<api-key>")
	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.taxwire.com/customers/batch")
  .header("X-API-Key", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"data\": [\n    {\n      \"source_id\": \"CUS-1042\",\n      \"name\": \"Acme Wholesale Inc.\",\n      \"source_updated_at\": \"2026-09-15T08:30:00Z\"\n    },\n    {\n      \"source_id\": \"CUS-1043\",\n      \"name\": \"Beta Corp\",\n      \"email\": \"billing@beta.example\",\n      \"source_updated_at\": \"2026-09-15T08:29:41Z\"\n    },\n    {\n      \"name\": \"Gamma Supply\"\n    }\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.taxwire.com/customers/batch")

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

request = Net::HTTP::Post.new(url)
request["X-API-Key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"data\": [\n    {\n      \"source_id\": \"CUS-1042\",\n      \"name\": \"Acme Wholesale Inc.\",\n      \"source_updated_at\": \"2026-09-15T08:30:00Z\"\n    },\n    {\n      \"source_id\": \"CUS-1043\",\n      \"name\": \"Beta Corp\",\n      \"email\": \"billing@beta.example\",\n      \"source_updated_at\": \"2026-09-15T08:29:41Z\"\n    },\n    {\n      \"name\": \"Gamma Supply\"\n    }\n  ]\n}"

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

{
  "object": "batch",
  "summary": {
    "created": 1,
    "updated": 1,
    "stale": 0,
    "deleted": 0,
    "failed": 1
  },
  "data": [
    {
      "index": 0,
      "status": "updated",
      "customer": {
        "id": "cust_01J9Z8Q4E7K2M3N4P5R6S7T8U9",
        "source_id": "CUS-1042",
        "source": "taxwire",
        "source_account_id": "__default__",
        "name": "Acme Wholesale Inc.",
        "email": "ap@acme.example",
        "source_updated_at": "2026-09-15T08:30:00Z",
        "created_at": "2026-09-14T20:00:00Z",
        "updated_at": "2026-09-15T08:30:05Z"
      }
    },
    {
      "index": 1,
      "status": "created",
      "customer": {
        "id": "cust_01J9ZB7V3M8N2K4P6Q1R5S7T9W",
        "source_id": "CUS-1043",
        "source": "taxwire",
        "source_account_id": "__default__",
        "name": "Beta Corp",
        "email": "billing@beta.example",
        "source_updated_at": "2026-09-15T08:29:41Z",
        "created_at": "2026-09-15T08:30:05Z",
        "updated_at": "2026-09-15T08:30:05Z"
      }
    },
    {
      "index": 2,
      "status": "failed",
      "errors": [
        {
          "status": "422",
          "code": "validation_required_field",
          "title": "Missing source_id",
          "detail": "Please provide a value for the required source_id field",
          "source": {
            "pointer": "/data/attributes/data/2/source_id"
          }
        }
      ]
    }
  ]
}

{
  "errors": [
    {
      "status": "413",
      "code": "request_too_large",
      "title": "Request Too Large",
      "detail": "The request body is 5242881 bytes; this API accepts at most 5242880. Split it into smaller requests."
    }
  ]
}

{
  "errors": [
    {
      "status": "422",
      "code": "validation_error",
      "title": "Validation Error",
      "detail": "List should have at most 1000 items after validation, not 1001",
      "source": {
        "pointer": "/data/attributes/data"
      }
    }
  ]
}

{
  "errors": [
    {
      "status": "429",
      "code": "rate_limit_error",
      "title": "Too Many Requests",
      "detail": "Rate limit exceeded"
    }
  ]
}

{
  "errors": [
    {
      "status": "500",
      "code": "system_internal_error",
      "title": "Internal Error",
      "detail": "An unexpected error occurred. Our team has been notified."
    }
  ]
}