PronunDict
a pronunciation dictionary of American English
...://github.com/rhdunn/amepd)
2. CMUdict -- the Carnegie Mellon University Pronouncing Dictionary, (http://www.speech.cs.cmu.edu/cgi-bin/cmudict)
Warning:
Unfortunately, this dictionary is not flawless. There are some errors in the dictionary entries. Also, marking of stressed syllables does not always work perfectly, because syllable boundaries are only guessed based on a set of possible syllable onsets.
You can follow PronunDict on Twitter.
https://twitter.com/PronunDict