Documentation:

Endpoint: Description generator
Method: GET

Inputs:

subject: (required) A string containing the value proposition for the product or service being advertised. Should contain keywords in comma delimited format, accepts between 10 and 60 characters.
url: (required) A URL that has content that describes the product or service being advertised. API will parse the relevant keywords and phrases from the page to help generate quality ads.
mostImportantKeywords: (optional) A string containing the most important keywords about the ad group being advertised, up to 100 characters long.
language: (optional) A 2-letter string in ISO-2 format representing the target audience language. Currently in alpha testing, results may not be guaranteed.
country: (optional) A 2-letter string in ISO-2 format representing the target audience country. Currently in alpha testing, results may not be guaranteed.
exampleDescriptions: (optional) A string containing example descriptions to fine-tune the results received, up to 200 characters long.

Output:
An array of up to 10 ad descriptions, each a string up to 90 characters long.

Endpoint: Headlines generator
Method: GET

Inputs:

subject: (required) A string containing the value proposition for the product or service being advertised. Should contain keywords in comma delimited format, accepts between 10 and 60 characters.
url: (required) A URL that has content that describes the product or service being advertised. API will parse the relevant keywords and phrases from the page to help generate quality ads.
mostImportantKeywords: (optional) A string containing the most important keywords about the ad group being advertised, up to 100 characters long.
language: (optional) A 2-letter string in ISO-2 format representing the target audience language. Currently in alpha testing, results may not be guaranteed.
country: (optional) A 2-letter string in ISO-2 format representing the target audience country. Currently in alpha testing, results may not be guaranteed.
exampleHeadlines: (optional) A string containing example headlines to fine-tune the results received, up to 200 characters long.

Output:
An array of up to 10 ad headlines, each a string up to 30 characters long.