kalle@musa:~/projekt/wikimedia/mediawiki/extensions/Wikispeech$ git review -R
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The outstanding commits are:

525e122 (HEAD -> T245823) Wikispeech: Log warning on invalid manifest configuration values
d8295e6 Add API action for requesting speech synthesis

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remote: 
remote: Processing changes: refs: 1
remote: Processing changes: refs: 1, done            
To ssh://gerrit.wikimedia.org:29418/mediawiki/extensions/Wikispeech
 ! [remote rejected] HEAD -> refs/for/master%topic=T245823 (cannot add patch set to 570042.)
error: failed to push some refs to 'ssh://karlwettin@gerrit.wikimedia.org:29418/mediawiki/extensions/Wikispeech'

File includes/ApiWikispeechListen.php:

Patch Set #7, Line 22: $serverUrl = $config->get( 'WikispeechServerUrl' );

I'm not certain, is the onBeforePageDisplay hook executed prior to an API call and thus validating t […]

No, the BeforePageDisplay isn't run for the API. Could you make a follow up task to add the check to the API or add a note in the original log task?