Lars Aronsson, 13/03/2013 02:01:
[...] Provide a tool on the toolserver, or any other server, having a simple link syntax that specifies the language code and the text, e.g. http://toolserver.org/mytool.php?lang=fr&text=gouter [...]
Why should it be a web service at all? Hardest part is probably communicating with audio drivers of your machine? I recently asked one such tool at http://thread.gmane.org/gmane.org.wikimedia.foundation/64143/ and I was pointed to http://croak.it/ ; I didn't try it and I don't know if it's something one could build upon, but surely it's not a complete solution for us, lacking upload in particular.
Nemo