An API, in simple terms, is a method by which two software components can communicate with each other, and provides the software developer with a set of routines and tools they can use to build new software on.
The documentation for the REST API can be found at http://www.pcrecruiter.net/apidocs_v2/
The API was originally built by Main Sequence development team for internal use for external connections like PCRecruiter for Microsoft Outlook and PCR Capture. The API is now public, allowing PCR clients to contract independent developers for custom software that links to the PCRecruiter database, such as job boards, import/export tools, mobile applications, data integrations, and so on.
It should be noted that the API is a tool with which a qualified programmer may build new, custom software integrated with the PCRecruiter database, but cannot be used for altering the PCRecruiter software itself, which remains solely under the control of Main Sequence.
If you have questions about using the API that cannot be found within the documentation, open a ticket at help.pcrecruiter.com or email support@mainsequence.net with the subject “API Support Request”.