The invention relates to an API Validator that allows developers to rate their Open API Specification (e.g., swagger files, API contracts) based on the standards for building APIs. The tool may parse the contract and look for compliance (or non-compliance) with the standards, using algorithms. A detailed report and overall score is presented to the developer once the contract has been checked. An embodiment of the present is directed to a plug-in that enables metrics generation as part of an automated build process. An embodiment of the present invention provides an integration process that enables a developer or other user to automatically resolve validation issues identified with APIs.