curl --request POST \
  --url https://platform.runonatlas.com/external/customers/external-id/{externalId}/stripe/checkout-sessions/setup \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "successUrl": "https://www.example.com/success",
  "email": "john.doe@example.com",
  "name": "John Doe"
}
'

import requests

url = "https://platform.runonatlas.com/external/customers/external-id/{externalId}/stripe/checkout-sessions/setup"

payload = {
    "successUrl": "https://www.example.com/success",
    "email": "john.doe@example.com",
    "name": "John Doe"
}
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({
    successUrl: 'https://www.example.com/success',
    email: 'john.doe@example.com',
    name: 'John Doe'
  })
};

fetch('https://platform.runonatlas.com/external/customers/external-id/{externalId}/stripe/checkout-sessions/setup', 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://platform.runonatlas.com/external/customers/external-id/{externalId}/stripe/checkout-sessions/setup",
  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([
    'successUrl' => 'https://www.example.com/success',
    'email' => 'john.doe@example.com',
    'name' => 'John Doe'
  ]),
  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://platform.runonatlas.com/external/customers/external-id/{externalId}/stripe/checkout-sessions/setup"

	payload := strings.NewReader("{\n  \"successUrl\": \"https://www.example.com/success\",\n  \"email\": \"john.doe@example.com\",\n  \"name\": \"John Doe\"\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://platform.runonatlas.com/external/customers/external-id/{externalId}/stripe/checkout-sessions/setup")
  .header("x-api-key", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"successUrl\": \"https://www.example.com/success\",\n  \"email\": \"john.doe@example.com\",\n  \"name\": \"John Doe\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://platform.runonatlas.com/external/customers/external-id/{externalId}/stripe/checkout-sessions/setup")

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  \"successUrl\": \"https://www.example.com/success\",\n  \"email\": \"john.doe@example.com\",\n  \"name\": \"John Doe\"\n}"

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

{
  "id": "cs_test_1234567890abcdef",
  "object": "checkout.session",
  "url": "https://checkout.stripe.com/c/pay/cs_test_1234567890abcdef",
  "status": "open",
  "mode": "setup",
  "customer": "cus_1234567890abcdef",
  "success_url": "https://example.com/success",
  "setup_intent": "seti_1234567890abcdef",
  "payment_status": "no_payment_required",
  "created": 1640995200,
  "expires_at": 1641081600,
  "livemode": false,
  "currency": "usd",
  "metadata": {}
}