Old School RuneScape: Price Guide - API
Search mode will return any items with names matching the search term. To use the Price Guide API in this way, pass your search term at the end of this URL like so:
Data is returned as JSON. The search term must be at least four characters long, and no more than ten items will be returned.
Direct Item Lookup
If you know the exact item name or ID, you can do a direct lookup instead. Pass the name or item ID at the end of the URL like so:
Data is returned as JSON. This method will always return one item or an error message.
With some effort, you can use this to import Price Guide data directly into a Google Spreadsheet: importJSON