How to complete the challenge `GET /todos/{id} (200) text/calendar`

By Alan RichardsonPublished 2026-08-01

This challenge asks for one existing todo in calendar format. The API returns a minimal VCALENDAR containing a single VTODO.

GET /todos/{id} (200) text/calendar

Issue a GET request on the /todos/{id} end point with an Accept header of text/calendar to receive the todo as a VTODO.

Use a real todo id, not the literal text {id}
Add the Accept: text/calendar header
Add the X-CHALLENGER header to track progress
The response status should be 200
The response Content-Type should be text/calendar

Basic Instructions

Find an existing todo by calling GET /todos
If there are no todos, create one with POST /todos
Issue a GET request to /todos/{id}
Send Accept: text/calendar

Try it now

If you don't know what todos are available, list them first.

GET /todos to see what todos are available now

If there are no todos, create one.

POST /todos to create a todo for the calendar request

GET /todos/{id} as text/calendar

Example Request

> GET /todos/1 HTTP/1.1
> Host: apichallenges.com
> X-CHALLENGER: x-challenger-guid
> Accept: text/calendar

Example Response

< HTTP/1.1 200 OK
< Content-Type: text/calendar
< X-Challenger: x-challenger-guid

Example Response body:

BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//EvilTester//API Challenges//EN
BEGIN:VTODO
UID:todo-1@apichallenges
SUMMARY:calendar todo
DESCRIPTION:created for the text/calendar solution
STATUS:NEEDS-ACTION
END:VTODO
END:VCALENDAR

Experiment with this endpoint

How to complete the challenge GET /todos/{id} (200) text/calendar