Your account will be charged only for posting a task. You can get the results of the task within the next 30 days for free.
The cost can be calculated on the Pricing page.
Get Google Finance Ticker Search Results by id
Google Finance Ticker Search allows you to search for financial instruments available on Google Finance along with additional information. The result is specific to the parameters you specify in the request: keyword (name of a company or financial instrument) in the keyword field, location and language.