Record a checkout starting

curl --request POST \
  --url https://api.fluid.app/api/public/v2025-06/events/checkout/started \
  --header 'Content-Type: application/json' \
  --data '
{
  "cart_token": "ct_8Rw2mKq7XvT4pLz9NcB3Hd",
  "metadata": {
    "fluid_shop": "dunder-mifflin.fluid.app",
    "fluid_session": "fs_7kQx9mR2vWbT4nHcJ8pLz3",
    "fluid_locale": "en_US",
    "attribution": {
      "username": "dwight-schrute"
    }
  }
}
'

import requests

url = "https://api.fluid.app/api/public/v2025-06/events/checkout/started"

payload = {
    "cart_token": "ct_8Rw2mKq7XvT4pLz9NcB3Hd",
    "metadata": {
        "fluid_shop": "dunder-mifflin.fluid.app",
        "fluid_session": "fs_7kQx9mR2vWbT4nHcJ8pLz3",
        "fluid_locale": "en_US",
        "attribution": { "username": "dwight-schrute" }
    }
}
headers = {"Content-Type": "application/json"}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({
    cart_token: 'ct_8Rw2mKq7XvT4pLz9NcB3Hd',
    metadata: {
      fluid_shop: 'dunder-mifflin.fluid.app',
      fluid_session: 'fs_7kQx9mR2vWbT4nHcJ8pLz3',
      fluid_locale: 'en_US',
      attribution: {username: 'dwight-schrute'}
    }
  })
};

fetch('https://api.fluid.app/api/public/v2025-06/events/checkout/started', 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.fluid.app/api/public/v2025-06/events/checkout/started",
  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([
    'cart_token' => 'ct_8Rw2mKq7XvT4pLz9NcB3Hd',
    'metadata' => [
        'fluid_shop' => 'dunder-mifflin.fluid.app',
        'fluid_session' => 'fs_7kQx9mR2vWbT4nHcJ8pLz3',
        'fluid_locale' => 'en_US',
        'attribution' => [
                'username' => 'dwight-schrute'
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "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.fluid.app/api/public/v2025-06/events/checkout/started"

	payload := strings.NewReader("{\n  \"cart_token\": \"ct_8Rw2mKq7XvT4pLz9NcB3Hd\",\n  \"metadata\": {\n    \"fluid_shop\": \"dunder-mifflin.fluid.app\",\n    \"fluid_session\": \"fs_7kQx9mR2vWbT4nHcJ8pLz3\",\n    \"fluid_locale\": \"en_US\",\n    \"attribution\": {\n      \"username\": \"dwight-schrute\"\n    }\n  }\n}")

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

	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.fluid.app/api/public/v2025-06/events/checkout/started")
  .header("Content-Type", "application/json")
  .body("{\n  \"cart_token\": \"ct_8Rw2mKq7XvT4pLz9NcB3Hd\",\n  \"metadata\": {\n    \"fluid_shop\": \"dunder-mifflin.fluid.app\",\n    \"fluid_session\": \"fs_7kQx9mR2vWbT4nHcJ8pLz3\",\n    \"fluid_locale\": \"en_US\",\n    \"attribution\": {\n      \"username\": \"dwight-schrute\"\n    }\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.fluid.app/api/public/v2025-06/events/checkout/started")

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

request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n  \"cart_token\": \"ct_8Rw2mKq7XvT4pLz9NcB3Hd\",\n  \"metadata\": {\n    \"fluid_shop\": \"dunder-mifflin.fluid.app\",\n    \"fluid_session\": \"fs_7kQx9mR2vWbT4nHcJ8pLz3\",\n    \"fluid_locale\": \"en_US\",\n    \"attribution\": {\n      \"username\": \"dwight-schrute\"\n    }\n  }\n}"

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

{
  "status": 201,
  "metadata": {
    "fluid_shop": "dunder-mifflin.fluid.app",
    "fluid_session": "fs_7kQx9mR2vWbT4nHcJ8pLz3",
    "fluid_locale": "en_US",
    "request_uuid": "5e1c8a37-9d2b-4f64-a0e3-7b6f2c9d1a58",
    "timestamp": "2026-09-14T15:31:47Z"
  }
}