gistfile1.txt

testCase
ERRORS
- [0]: { type: 'non-document-error',
  url: 'https://raw.githubusercontent.com/citation-style-language/schema/v1.0.1/csl-types.rnc',
  subType: 'io',
  message: 'HTTP resource not retrievable. The HTTP status from the remote server was: 503.' }
REQUEST
GET http://validator.w3.org/nu/?doc=https%3A%2F%2Fraw.githubusercontent.com%2Fcitation-style-language%2Fstyles%2Fmaster%2Fapa.csl&schema=https%3A%2F%2Fraw.githubusercontent.com%2Fcitation-style-language%2Fschema%2Fv1.0.1%2Fcsl.rnc%20https%3A%2F%2Fraw.githubusercontent.com%2Fcitation-style-language%2Fschema%2Fmaster%2Fcsl.sch&parser=xml&laxtype=yes&level=error&out=json&showsource=yes
HEADERS
{
  "User-Agent": "Mozilla/5.0 (compatible; Yaya/0.0; +https://ping-api.com/)",
  "accept-encoding": "gzip"
}
RESPONSE
STATUS CODE
200

RESPONSE TIME
15,479 ms

HEADERS
{
  "date": "Thu, 09 Mar 2017 15:36:22 GMT",
  "accept-encoding": "gzip",
  "access-control-allow-origin": "*",
  "access-control-allow-headers": "content-type",
  "expires": "Thu, 01 Jan 1970 00:00:00 GMT",
  "cache-control": "no-cache",
  "content-type": "application/json; charset=utf-8",
  "content-encoding": "gzip",
  "vary": "Accept-Encoding, User-Agent",
  "connection": "close",
  "server": "Jetty(9.2.9.v20150224)"
}
BODY
{
  "url": "https://raw.githubusercontent.com/citation-style-language/styles/master/apa.csl",
  "messages": [
    {
      "type": "non-document-error",
      "url": "https://raw.githubusercontent.com/citation-style-language/schema/v1.0.1/csl-types.rnc",
      "subType": "io",
      "message": "HTTP resource not retrievable. The HTTP status from the remote server was: 503."
    }
  ],
  "source": {
    "code": ""
  }
}

@sideshowbarker, the REST API for http://validator.w3.org/nu/ seems to be down since earlier this morning. See https://twitter.com/rintzezelle/status/839863428999229442 for more details. Could you take a look? Thanks!

The API service works again, now. (and it seems to be much faster than usual)