Reference for http://www.bungie.net/Platform/Destiny2/Vendors/

Get items available from vendors where the vendors have items for sale that are common for everyone. If any portion of the Vendor's available inventory is character or account specific, we will be unable to return their data from this endpoint due to the way that available inventory is computed. As I am often guilty of saying: 'It's a long story...'

Url: http://www.bungie.net/Platform/Destiny2/Vendors/

HTTP Method: GET

Requires Sign-in: false

Url Parameters:

Parameter Name	Description
components	A comma separated list of components to return (as strings or numeric values). See the DestinyComponentType enum for valid components to request. You must request at least one component to receive results.

Request/Response Body Formats:

Message Direction	Format	Body
Request	N/A	HTTP Get requests have no request body.
Response	JSON	JSON object

The following is an example of a response JSON body for this method.

{
  "Response": null,
  "ErrorCode": 0,
  "ThrottleSeconds": 0,
  "ErrorStatus": null,
  "Message": null,
  "MessageData": null,
  "DetailedErrorTrace": null
}