Yes, YQL does rate limiting. <br><br>For more information, <br>search for &quot;usage limits&quot; here http://developer.yahoo.com/yql/<br>http://y.ahoo.it/UktMo<br><br><br> QUOTE (Brian @ 12 Jan 2012 5:50 AM) I have been using the YQL dev console for testing and towards the end of the day, notice that it no longer works. &nbsp;Is there a daily call limit? &nbsp;Can anyone point me to info on that?<br><br>Also, if there is a limit, is there a &#39;key&#39; I can register for and use that will allow more calls?<br><br>Thanks,<br>Brian

Thanks, I later found that page - but am still experiencing erratic reliability - even though there is no way I could be approaching those limits...<br><br>I have e-mailed YQL support, but gotten no response.<br><br> QUOTE (Krypto @ 12 Jan 2012 4:25 PM) Yes, YQL does rate limiting. <br><br>For more information, <br>search for &quot;usage limits&quot; here http://developer.yahoo.com/yql/<br>http://y.ahoo.it/UktMo<br><br><br> QUOTE (Brian @ 12 Jan 2012 5:50 AM) I have been using the YQL dev console for testing and towards the end of the day, notice that it no longer works. &nbsp;Is there a daily call limit? &nbsp;Can anyone point me to info on that?<br><br>Also, if there is a limit, is there a &#39;key&#39; I can register for and use that will allow more calls?<br><br>Thanks,<br>Brian

So, once again it seems that instead of simply answering the question, someone at Yahoo simply put &quot;search for this&quot;.&nbsp; Well, I TRIED searching for that term, and there is no answer to this guy&#39;s question there.&nbsp; There is absolutely no information about how to get this mysterious &quot;Access Key&quot; that is references in http://developer.yahoo.com/yql/<br><br>Nor is there any information about the daily limit or per second limit that might answer his question.<br><br>Why is Yahoo keeping this information secret?<br><br><br><br> QUOTE (Brian @ 12 Jan 2012 5:50 AM) I have been using the YQL dev console for testing and towards the end of the day, notice that it no longer works. &nbsp;Is there a daily call limit? &nbsp;Can anyone point me to info on that?<br><br>Also, if there is a limit, is there a &#39;key&#39; I can register for and use that will allow more calls?<br><br>Thanks,<br>Brian

<font size="2">For the dev console, there is an hourly call limit of 1000 per hour. public endpoint /v1/public/* has an hourly call limit of 1000 per ip per day. If you use oauth, the hourly call limit is 10,000 per access key per hour and the daily call limit is 100,000 per access key.&nbsp; </font><br><font size="2"><font face="Consolas, Courier New, Courier"><br>You can get a yahoo oauth access key here:<br><br>&nbsp; developer.yahoo.com/dashboard/createKey.html<br><br>Some specific examples for using oauth with yql through java and javascript:<br><br> &nbsp; developer.yahoo.com/forum/YQL/unable-to-pass-authentication/1225404508000-070ba0f2-4085-3657-a0ed-133a484ca415<br>&nbsp; paul.donnelly.org/2008/10/31/2-legged-oauth-javascript-function-for-yql/<br><br>More information regarding oAuth is here:<br><br>&nbsp; developer.yahoo.com/oauth/guide/<br><br><br></font></font>

correction:<br><br><font size="2">public endpoint /v1/public/* has an hourly call limit of 1000 per ip per hour</font><br>

<font size="2">I have been making signed oauth calls to query html and I&#39;m making a request every 2 seconds. I am also specifying the xpath to cut down on the response size. According to this I should be below the access limits but I still end up getting a 999 error after awhile.<br><br></font>

Andrew, If you are on a shared network, you might be sharing the rate limits with other computer. The 999 error is based on ip, and for some reason, the ip is hitting the limit or there might be some abuse.