POST /api/data/v2/datasources HTTP/1.1
Host: {instance}.domo.com
X-DOMO-Developer-Token: {token}
Content-Type: application/json

{
  "userDefinedType": "api",
  "dataSourceName": "hello world",
  "schema": {
    "columns": [
      {
        "type": "STRING",
        "name": "Friend"
      },
      {
        "type": "STRING",
        "name": "Attending"
      }
    ]
  }
}

curl --request POST \
  --url https://{instance}.domo.com/api/data/v2/datasources \
  --header 'Content-Type: application/json' \
  --header 'X-DOMO-Developer-Token: <api-key>' \
  --data '
{
  "userDefinedType": "api",
  "dataSourceName": "hello world",
  "schema": {
    "columns": [
      {
        "type": "STRING",
        "name": "Friend"
      },
      {
        "type": "STRING",
        "name": "Attending"
      }
    ]
  }
}
'

import requests

url = "https://{instance}.domo.com/api/data/v2/datasources"

payload = {
    "userDefinedType": "api",
    "dataSourceName": "hello world",
    "schema": { "columns": [
            {
                "type": "STRING",
                "name": "Friend"
            },
            {
                "type": "STRING",
                "name": "Attending"
            }
        ] }
}
headers = {
    "X-DOMO-Developer-Token": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {'X-DOMO-Developer-Token': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    userDefinedType: 'api',
    dataSourceName: 'hello world',
    schema: {
      columns: [{type: 'STRING', name: 'Friend'}, {type: 'STRING', name: 'Attending'}]
    }
  })
};

fetch('https://{instance}.domo.com/api/data/v2/datasources', 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://{instance}.domo.com/api/data/v2/datasources",
  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([
    'userDefinedType' => 'api',
    'dataSourceName' => 'hello world',
    'schema' => [
        'columns' => [
                [
                                'type' => 'STRING',
                                'name' => 'Friend'
                ],
                [
                                'type' => 'STRING',
                                'name' => 'Attending'
                ]
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "X-DOMO-Developer-Token: <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://{instance}.domo.com/api/data/v2/datasources"

	payload := strings.NewReader("{\n  \"userDefinedType\": \"api\",\n  \"dataSourceName\": \"hello world\",\n  \"schema\": {\n    \"columns\": [\n      {\n        \"type\": \"STRING\",\n        \"name\": \"Friend\"\n      },\n      {\n        \"type\": \"STRING\",\n        \"name\": \"Attending\"\n      }\n    ]\n  }\n}")

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

	req.Header.Add("X-DOMO-Developer-Token", "<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://{instance}.domo.com/api/data/v2/datasources")
  .header("X-DOMO-Developer-Token", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"userDefinedType\": \"api\",\n  \"dataSourceName\": \"hello world\",\n  \"schema\": {\n    \"columns\": [\n      {\n        \"type\": \"STRING\",\n        \"name\": \"Friend\"\n      },\n      {\n        \"type\": \"STRING\",\n        \"name\": \"Attending\"\n      }\n    ]\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://{instance}.domo.com/api/data/v2/datasources")

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

request = Net::HTTP::Post.new(url)
request["X-DOMO-Developer-Token"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"userDefinedType\": \"api\",\n  \"dataSourceName\": \"hello world\",\n  \"schema\": {\n    \"columns\": [\n      {\n        \"type\": \"STRING\",\n        \"name\": \"Friend\"\n      },\n      {\n        \"type\": \"STRING\",\n        \"name\": \"Attending\"\n      }\n    ]\n  }\n}"

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