To use DTN’s web services, you must display DTN’s logo on each page that our information appears. The DTN logo is available here.
If you can and choose to display a DTNPF news article directly on your site, you MUST set a Canonical link reference in the <head> section of your page. Something like this example:
<link rel="canonical" href="https://www.dtnpf.com/agriculture/web/ag/news/crops/article/2018/12/07/global-phosphorous-market-balanced-2" />
This href value is available as the dtnpfUrl field in the Article response. This will protect both your and dtnpf.com SEO.
More Publishing API documentation can be found here: News API Docs
To test the APIs in the documentation site, click the Authorize button. Paste the test key of oViXqthDGFNVw3IvAsnKrFG1AcfPyA6b in the apikey-query text box.