LinkedIn is a social network service for professionals. The API LinkedIn People Search could help developers to access information about people. This is an API about personal information. As LinkedIn discloses in their website, this API is part of the Vetted Access Program. It is recommended to obtain approval from the company first. The following permissions are required: basic profile default, all or none grant, optimization for 3 permissions and permission changes. Similarly, the next calls are offered: user’s own data, user’s network data, groups data and company data. The API format is XML and requires OAuth for authentication.