The root of my installation directory is <a href="http://www.WEBSITE.com/wiki/">http://www.WEBSITE.com/wiki/</a>, and index.php is located in that directory. Since I have other software packages installed on my web server, I have them all installed in respective subdirectories. /wiki/ is the one for Mediawiki <br>
<br><div class="gmail_quote">On Tue, Jul 27, 2010 at 1:44 AM,  <span dir="ltr">&lt;<a href="mailto:mediawiki-api-request@lists.wikimedia.org">mediawiki-api-request@lists.wikimedia.org</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">

<br>
the api.php file is located at the same place as your index.php, the<br>
so called &quot;root&quot;. usually not a url with /wiki/<br>
<br>
example:<br>
<a href="http://foo/api.php" target="_blank">http://foo/api.php</a><br>
<br>
not<br>
<a href="http://foo/wiki/api.php" target="_blank">http://foo/wiki/api.php</a><br></blockquote></div>