oas-validator

Usage:

1const validator = require('oas-validator');
2const options = {};
3validator.validate(openapi, options, function(err, options){
4  // options.valid contains the result of the validation
5  // options.context now contains a stack (array) of JSON-Pointer strings
6});

If the callback argument of validate is omitted, a Promise is returned instead.

See here for complete documentation of the options object.