curl --request POST \
  --url https://api.gominerva.com/custom-lists/v2/organizations/{orgId}/{listId}/uploads/preview \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "merge_mode": "validate_only",
  "record_id_column": "record_uid",
  "parsed_records": [
    {
      "record_uid": "cl-0001",
      "name": "Acme Trading Ltd",
      "entity_type": "organization",
      "feed_category": "internal"
    }
  ]
}
'

import requests

url = "https://api.gominerva.com/custom-lists/v2/organizations/{orgId}/{listId}/uploads/preview"

payload = {
    "merge_mode": "validate_only",
    "record_id_column": "record_uid",
    "parsed_records": [
        {
            "record_uid": "cl-0001",
            "name": "Acme Trading Ltd",
            "entity_type": "organization",
            "feed_category": "internal"
        }
    ]
}
headers = {
    "Authorization": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    merge_mode: 'validate_only',
    record_id_column: 'record_uid',
    parsed_records: [
      {
        record_uid: 'cl-0001',
        name: 'Acme Trading Ltd',
        entity_type: 'organization',
        feed_category: 'internal'
      }
    ]
  })
};

fetch('https://api.gominerva.com/custom-lists/v2/organizations/{orgId}/{listId}/uploads/preview', 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.gominerva.com/custom-lists/v2/organizations/{orgId}/{listId}/uploads/preview",
  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([
    'merge_mode' => 'validate_only',
    'record_id_column' => 'record_uid',
    'parsed_records' => [
        [
                'record_uid' => 'cl-0001',
                'name' => 'Acme Trading Ltd',
                'entity_type' => 'organization',
                'feed_category' => 'internal'
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: <api-key>",
    "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.gominerva.com/custom-lists/v2/organizations/{orgId}/{listId}/uploads/preview"

	payload := strings.NewReader("{\n  \"merge_mode\": \"validate_only\",\n  \"record_id_column\": \"record_uid\",\n  \"parsed_records\": [\n    {\n      \"record_uid\": \"cl-0001\",\n      \"name\": \"Acme Trading Ltd\",\n      \"entity_type\": \"organization\",\n      \"feed_category\": \"internal\"\n    }\n  ]\n}")

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

	req.Header.Add("Authorization", "<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.gominerva.com/custom-lists/v2/organizations/{orgId}/{listId}/uploads/preview")
  .header("Authorization", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"merge_mode\": \"validate_only\",\n  \"record_id_column\": \"record_uid\",\n  \"parsed_records\": [\n    {\n      \"record_uid\": \"cl-0001\",\n      \"name\": \"Acme Trading Ltd\",\n      \"entity_type\": \"organization\",\n      \"feed_category\": \"internal\"\n    }\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.gominerva.com/custom-lists/v2/organizations/{orgId}/{listId}/uploads/preview")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"merge_mode\": \"validate_only\",\n  \"record_id_column\": \"record_uid\",\n  \"parsed_records\": [\n    {\n      \"record_uid\": \"cl-0001\",\n      \"name\": \"Acme Trading Ltd\",\n      \"entity_type\": \"organization\",\n      \"feed_category\": \"internal\"\n    }\n  ]\n}"

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

{
  "data": {
    "id": "5b4c3d2e-7f8a-4b5c-8d9e-7f6a5b4c3d2e",
    "tenant_id": "123e4567-e89b-12d3-a456-426614174000",
    "list_id": "3f2a1b0c-9d8e-4f7a-8b6c-5d4e3f2a1b0c",
    "status": "validating",
    "merge_mode": "validate_only",
    "record_id_column": "record_uid",
    "parsed_record_count": 1,
    "adds": 1,
    "updates": 0,
    "unchanged": 0,
    "archives": 0,
    "preview_rows": [],
    "validation_errors": [],
    "job_id": "6c5d4e3f-6a7b-4c4d-9e8f-8a7b6c5d4e3f",
    "created_by": "64b1c0de00000000000000a1",
    "created_at": "2026-11-05T20:35:23.282Z",
    "updated_at": "2026-11-05T20:35:23.282Z"
  }
}

merge_mode is required.

Missing Authorization: Api-Key or x-api-key header.

Custom list management is not enabled.

Authentication service is unavailable.