<p><pre><code>    &gt; I’m not completely sure they do matter.
    &gt; There’s a lot of smart people at Facebook and they
    &gt; built an API that only ever returns 200.
</code></pre>
This is the best bit of the article.<p>Most (many?) APIs, whether or not their authors call them REST, are single URL APIs that you throw JSON&#x2F;YAML&#x2F;whatever at. If the caller is going to get back a serialized status message ([&quot;Not found&quot;]), then the HTTP request was successful, and it should return 200.<p>I&#x27;m not sure why people insist on spreading their APIs out between the transport and content layer.