jats-validator is a set of web services that take an XML document (as the xml field of a multipart/form-data POST request) and return the following:

• /format: the input XML document, indented and cleaned up (entities replaced, CDATA removed, etc).
• /dtd: a JSON object containing the results of validating the input against the DTD specified in the file's doctype. Network requests are disabled, and the DTD is loaded from the @jats4r/dtds module.
• /schematron: a JSON object containing the results of validating the input against the JATS4R Schematron rules. The schematron rules are loaded from the @jats4r/schematrons module.

The server runs as a lambda function when deployed for production, and can be run locally with now dev for development.