HTTP request settings

A full HTTP request is created by filling out the various parts of the HTTP request settings screen. Not all sections and fields are mandatory, only a name and URL are required to get going.

While building up your API check, you can run the request and its assertions using the Run request button. This will run the API checks on the production infrastructure and help you debug any issues.

Method & URL

An API check starts with creating an HTTP request including a HTTP verb (GET, POST, PUT, etc.) and a URL at the minimum.

  • Available methods are GET, POST, PUT, HEAD, DELETE, PATCH
  • URL’s are checked for correctness and must start with either http:// or https://

Checking the “This request should fail” box allows you to treat HTTP error codes (4xx and 5xx) as correct responses. This comes in handy when testing 404 pages or 500 error handling.


Add body content to your request by formatting your content as text. Selecting the type of content will automatically set the correct Content-Type header for your request.


This option sets the Content-Type request header to application/json. Format your input as standard JSON, i.e:

  "key1": "val2",
  "key2": {
    "nestedKey1": "val2"

JSON bodies are commonly used with REST APIs.


This option sets Content-Type request header to application/x-www-form-urlencoded. Format your input as a string of key/value pairs concatenated with ampersands, i.e:


Form encodes bodies are commonly used “traditional” HTML form submissions.


Use this input if neither JSON nor form parameters work for you. No Content-Type request header is set. You can set this header explicitly in the “headers” section.


Add HTTP request headers. The type ahead feature is pre-populated with the most common headers, but you can add any custom headers you want.

Clicking the lock icon toggles between encrypting the value of the header on the Checkly backend and hiding it from your screen.

Query parameters

This section allows you to add query parameters to the request URL in a structured way. You can add as many query parameters as you want. The interface is the same as for the HTTP headers: you can use the lock icon to toggle encryption and screen hiding.

You can also just leave the query parameters as part of the URL. Whatever works for you.

Basic authentication

To add HTTP basic authentication parameters to your API request, use the username and password fields in the relevant section.

Import a curl request

You can import the request method, url, headers and body from a curl command. Arguments --user-agent, --cookie and --compressed also work.

Import a Swagger / OpenAPI specification

If your API implements the Swagger 2.0 or OpenAPI spec, you can import the swagger.json spec. The importer parses your spec and prompts you to make some decisions which requests to imported and how.

  • Name: you can set the check name to the “description” or “url” from your spec.
  • Tags: import tags from you spec.
  • Headers: import HTTP headers from you spec.
  • Query parameters: import query parameters from you spec.
  • Add a “group” tag: Copy the name of you spec to a tag and add it to each imported request. This helps filtering and grouping related in the Checkly dashboard.
Next: Environment variables

Last updated on December 4, 2018