How to complete the challenge `PATCH /todos/id (200) json-patch`

By Alan RichardsonUpdated 2026-07-30

Use PATCH with Content-Type: application/json-patch+json when you want to send a JSON Patch operation list.

PATCH /todos/id (200) json-patch

Issue a PATCH request to update an existing todo using JSON Patch operations.

Use PATCH /todos/{id} where {id} is an existing todo id.
Add Content-Type: application/json-patch+json for the JSON Patch standard.
Send an array of JSON Patch operations.
The response should be 200.
Use JSON Pointer paths such as /title, /description, or /doneStatus.
You can learn more about PATCH in the HTTP verbs tutorial.

Basic Instructions

Issue a PATCH request to:
- https://apichallenges.com/todos/{{firstTodoId}}
The request should have an X-CHALLENGER header so the challenge is tracked.
The request body can be a JSON Patch operation array:

[
  {
    "op": "replace",
    "path": "/title",
    "value": "patched with json patch"
  }
]

Try it now

If you don't know what todos are available then you can check by GET /todos. See the solution.

GET /todos to see what todos are available now

If you have already deleted all todos, create one using POST /todos. See the solution.

POST /todos to create a todo item for this challenge

PATCH /todos/{id} with JSON Patch to update a todo

Example Request

> PATCH /todos/3 HTTP/1.1
> Host: apichallenges.com
> User-Agent: rest-client
> X-CHALLENGER: x-challenger-guid
> Content-Type: application/json-patch+json
> Accept: application/json
>
> [{"op":"replace","path":"/title","value":"patched with json patch"}]

Example Response

< HTTP/1.1 200 OK
< Content-Type: application/json
< Accept-Patch: application/json, application/merge-patch+json, application/json-patch+json
< X-Challenger: x-challenger-guid

Returned body:

{
  "id": 3,
  "title": "patched with json patch",
  "doneStatus": false,
  "description": "existing description"
}

Experiment with this endpoint

How to complete the challenge PATCH /todos/id (200) json-patch