Grepwords is an API-first keyword suggestion service that can be usefully employed in research scenarios. The Grepword keywords services can also be used to determine the most accurate keywords to use in an online campaign. The keyword lookup API will return all data associated with the keywords found in the Grepwords database. The API received HTTP requests and can return data in JSON, XML, or CSV formatted responses. The Grepwords API is granted as part of Grepwords paid subscription services.