Many API methods take optional parameters. For GET requests, any parameters not

specified as a segment in the path can be passed as an HTTP query string

parameter:

<preclass="terminal">

$ curl -i "https://api.github.com/repos/mojombo/jekyll/issues?state=closed"

</pre>

In this example, the 'mojombo' and 'jekyll' values are provided for the`:user`

and`:repo` parameters in the path while`:state` is passed in the query

string.

For POST requests, parameters not included in the URL should be encoded as JSON

with a Content-Type of 'application/x-www-form-urlencoded':

<preclass="terminal">

$ curl -i -u username -d '{"scopes":["public_repo"]}' https://api.github.com/authorizations

</pre>

There are three possible types of client errors on API calls that