Partially update an event with a JSON merge patch

PATCHhttps://api.testingapis.com/api/Events/{id}Sign in to see this endpoint's URL

Only the fields present in the body change, and nested objects are merged rather than replaced. The ID and unknown fields are never applied; they are listed in ignored. The patched record is validated before it is saved, so a rejected patch changes nothing.

Parameters 1

Name	Type	Description
`id`required	path · integer (int32)	Record ID.

Request body

Optional. application/json, text/json, application/*+json, application/xml, text/xml, application/*+xml. JSON object with the fields to change, e.g. { "price": 12.5 }.

Example body

{"name": "DevConf 2026"}

Responses

200: Patched; returns { message, changed, ignored, data }.
400: The body is not an object, sets a non-nullable field to null, has a wrongly typed value, or the result fails validation.
404: No record has this ID.

Example

Request

curl -X PATCH "https://api.testingapis.com/api/Events/16" \
  -H "Content-Type: application/json" \
  -d '{"name": "DevConf 2026"}' \
  -H "X-TestingApis-Key: YOUR_API_KEY"

Response200 OK

{
  "message": "Event patched successfully",
  "changed": ["name"],
  "ignored": [],
  "data": {
    "id": 16,
    "name": "DevConf 2026",
    "category": "conference",
    "venue": "Moscone Center",
    "city": "San Francisco",
    "startsAt": "2026-10-14T09:00:00Z",
    "endsAt": "2026-10-16T18:00:00Z",
    "price": 499.0,
    "capacity": 5000,
… (5 more lines)

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api.testingapis.com

curl -X PATCH 'https://api.testingapis.com/api/Events/16' \
  -H 'Content-Type: application/json' \
  -H 'X-TestingApis-Key: YOUR_API_KEY' \
  -d '{"name": "DevConf 2026"}'

const res = await fetch("https://api.testingapis.com/api/Events/16", {
  method: "PATCH",
  headers: {
    "Content-Type": "application/json",
    "X-TestingApis-Key": "YOUR_API_KEY",
  },
  body: "{\"name\": \"DevConf 2026\"}",
});
console.log(res.status, await res.text());

const res = await fetch("https://api.testingapis.com/api/Events/16", {
  method: "PATCH",
  headers: {
    "Content-Type": "application/json",
    "X-TestingApis-Key": "YOUR_API_KEY",
  },
  body: "{\"name\": \"DevConf 2026\"}",
});
const body: string = await res.text();
console.log(res.status, body);

import requests

res = requests.patch(
    "https://api.testingapis.com/api/Events/16",
    headers={
        "Content-Type": "application/json",
        "X-TestingApis-Key": "YOUR_API_KEY",
    },
    data="{\"name\": \"DevConf 2026\"}",
)
print(res.status_code, res.text)

using System.Net.Http.Headers;

using var client = new HttpClient();
using var request = new HttpRequestMessage(HttpMethod.Patch, "https://api.testingapis.com/api/Events/16");
request.Headers.TryAddWithoutValidation("X-TestingApis-Key", "YOUR_API_KEY");
request.Content = new StringContent("{\"name\": \"DevConf 2026\"}");
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/Events/16"))
                .header("X-TestingApis-Key", "YOUR_API_KEY")
                .header("Content-Type", "application/json")
                .method("PATCH", HttpRequest.BodyPublishers.ofString("{\"name\": \"DevConf 2026\"}"))
                .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("{\"name\": \"DevConf 2026\"}")
	req, err := http.NewRequest("PATCH", "https://api.testingapis.com/api/Events/16", 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))
}

PATCHhttps://api.testingapis.com/api/Events/16

Path

idrequiredinteger (int32)