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The cost can be calculated on the Pricing page.
Get ‘Keywords For Category’ Results by id
This endpoint will select keywords for the specified product category. In addition to the result, you will also receive search volume for the last month, search volume trend for the last year (that allows estimating search volume dynamics), as well as current cost-per-click and competition values for paid search.
Note that the keywords provided for the defined category do not differ by location. However, competition, CPC, search volume, and monthly searches will be specific to the location you set.
You can get up to 3000 keyword suggestions with all essential keyword data in response to one request.
