REST Headers for Tooling API

Control the behavior of REST requests:

• Call Options Header

  Specifies options for the client you’re using to access REST API resources. For example, you can provide a default namespace prefix so that you don’t need to specify the prefix in your code.

• Limit Info Header

  This response header is returned in each request to REST API (except for calls to the Versions URI, /, which do not count towards your org’s limit). You can use the information to monitor API limits.

• Package Version Header

  Specifies the version of each package referenced by a client. A package version is a number that identifies the set of components and behavior contained in a package. This header can also be used to specify a package version when making calls to an Apex REST web service.

• Query Options Header

  Specifies options used in a query, such as the query results batch size. Use this request header with the Query resource.