Create a cart

POSThttps://api.testingapis.com/api/CartsSign in to see this endpoint's URL

Request body

Optional. application/json, text/json, application/*+json, application/xml, text/xml, application/*+xml. Model: Cart. The new cart. Any client-supplied ID is replaced.

Example body

{"userId": 103, "items": [{"productId": 1, "quantity": 2, "price": 249.99}]}

Responses

200: OK
201: Created; returns { message, data } with the generated ID.
400: The request body is missing.
500: Unexpected server error.

Example

Request

curl -X POST "https://api.testingapis.com/api/Carts" \
  -H "Content-Type: application/json" \
  -d '{"userId": 103, "items": [{"productId": 1, "quantity": 2, "price": 249.99}]}' \
  -H "X-TestingApis-Key: YOUR_API_KEY"

Response201 Created

{
  "message": "Cart created successfully",
  "data": {
    "id": 12,
    "userId": 103,
    "items": [{"productId": 1, "quantity": 2, "price": 249.99}],
    "total": 499.98,
    "updatedAt": "2026-09-30T18:26:45Z"
  }
}

The parameters, request and response examples and the live Try it panel for this endpoint are for signed-in members. Accounts are free and take a few seconds to create.

Try itSign-in requiredUses your key

api.testingapis.com

curl -X POST 'https://api.testingapis.com/api/Carts' \
  -H 'Content-Type: application/json' \
  -H 'X-TestingApis-Key: YOUR_API_KEY' \
  -d '{"userId": 103, "items": [{"productId": 1, "quantity": 2, "price": 249.99}]}'

const res = await fetch("https://api.testingapis.com/api/Carts", {
  method: "POST",
  headers: {
    "Content-Type": "application/json",
    "X-TestingApis-Key": "YOUR_API_KEY",
  },
  body: "{\"userId\": 103, \"items\": [{\"productId\": 1, \"quantity\": 2, \"price\": 249.99}]}",
});
console.log(res.status, await res.text());

// The shape of the example response in the docs.
type ApiResponse = {
  message: string;
  data: {
    id: number;
    userId: number;
    items: {
      productId: number;
      quantity: number;
      price: number;
    }[];
    total: number;
    updatedAt: string;
  };
};

const res = await fetch("https://api.testingapis.com/api/Carts", {
  method: "POST",
  headers: {
    "Content-Type": "application/json",
    "X-TestingApis-Key": "YOUR_API_KEY",
  },
  body: "{\"userId\": 103, \"items\": [{\"productId\": 1, \"quantity\": 2, \"price\": 249.99}]}",
});
const body = (await res.json()) as ApiResponse;
console.log(res.status, body);

import requests

res = requests.post(
    "https://api.testingapis.com/api/Carts",
    headers={
        "Content-Type": "application/json",
        "X-TestingApis-Key": "YOUR_API_KEY",
    },
    data="{\"userId\": 103, \"items\": [{\"productId\": 1, \"quantity\": 2, \"price\": 249.99}]}",
)
print(res.status_code, res.text)

using System.Net.Http.Headers;

using var client = new HttpClient();
using var request = new HttpRequestMessage(HttpMethod.Post, "https://api.testingapis.com/api/Carts");
request.Headers.TryAddWithoutValidation("X-TestingApis-Key", "YOUR_API_KEY");
request.Content = new StringContent("{\"userId\": 103, \"items\": [{\"productId\": 1, \"quantity\": 2, \"price\": 249.99}]}");
request.Content.Headers.ContentType = MediaTypeHeaderValue.Parse("application/json");
using var response = await client.SendAsync(request);
Console.WriteLine($"{(int)response.StatusCode} {await response.Content.ReadAsStringAsync()}");

import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;

public class Main {
    public static void main(String[] args) throws Exception {
        HttpClient client = HttpClient.newHttpClient();
        HttpRequest request = HttpRequest.newBuilder(URI.create("https://api.testingapis.com/api/Carts"))
                .header("X-TestingApis-Key", "YOUR_API_KEY")
                .header("Content-Type", "application/json")
                .method("POST", HttpRequest.BodyPublishers.ofString("{\"userId\": 103, \"items\": [{\"productId\": 1, \"quantity\": 2, \"price\": 249.99}]}"))
                .build();
        HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
        System.out.println(response.statusCode() + " " + response.body());
    }
}

package main

import (
	"fmt"
	"io"
	"net/http"
	"strings"
)

func main() {
	body := strings.NewReader("{\"userId\": 103, \"items\": [{\"productId\": 1, \"quantity\": 2, \"price\": 249.99}]}")
	req, err := http.NewRequest("POST", "https://api.testingapis.com/api/Carts", body)
	if err != nil {
		panic(err)
	}
	req.Header.Set("X-TestingApis-Key", "YOUR_API_KEY")
	req.Header.Set("Content-Type", "application/json")
	res, err := http.DefaultClient.Do(req)
	if err != nil {
		panic(err)
	}
	defer res.Body.Close()
	data, err := io.ReadAll(res.Body)
	if err != nil {
		panic(err)
	}
	fmt.Println(res.StatusCode, string(data))
}

POSThttps://api.testingapis.com/api/Carts