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Showing content from https://learning.postman.com/docs/design-apis/collections/add-properties-to-parameters-and-headers/ below:

Add properties to parameters and headers with an API collection

After you turn on types in a collection, you can add properties to parameters and headers. Properties can include data type, format, default value, and possible values. You can also specify if a component is required. Details you add will appear in the collection's documentation.

To add properties to a parameter or header, do the following:

1. Turn on types for your collection.

2. Open a request and click the Params or Headers tab. Add any parameters or headers as needed.

3. Hover over a query or path parameter or a header and click Add more properties.

4. Specify details for the parameter or header:

   • Type - Select the component's data type (string, integer, number, or boolean).
   • Required - Turn on if the component is required, or turn off if it's optional.
   • Deprecated - Turn on if the component is deprecated. A deprecated parameter or header is still functional, but its usage is discouraged because support may be discontinued.
   • Default value - Specify the default value for the component.
   • Possible enum values - (All types except boolean) Enter the allowed values for the component (enumerations), selecting Enter after each item.

5. Specify optional details depending on the component type:

   • Type string:

     • Format - Select the data format for the string (for example, date, time, or email).
     • Pattern - Enter allowed data patterns for the component using regex (regular expressions). You can't enter a pattern if you selected a format for the string.
     • Min length - Enter the minimum length for the component.
     • Max length - Enter the maximum length for the component.

   • Type integer or number:

     • Min value - Enter the minimum value for the component.
     • Max value - Enter the maximum value for the component.

6. Click Save to save the changes to your request.

If you generated a specification from a collection, make sure to update the specification once you're done making changes.

Last modified: 2025/03/05

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