I am connecting to the QB API using a Go library that I found for OAuth 1.0a: https://github.com/kurrik/oauth1a. I actually had everything working, and I cannot think of anything that I changed, but now every request I make is returned with token_rejected. From what I have read elsewhere, this usually means that my access token has expired, but even if I start the whole 3-legged OAuth process from the beginning I will get the same response as soon as I am verified. I have triple-checked my consumer key and secret, I know they are correct. I can plug in the Access Token and Secret created using the API Explorer into my code and it works just fine, so I know the problem is something related to the Access Token that I am getting back from QB. Everything looks OK when I print out the tokens that I am using, they do match what QB sends me back via the querystring after the handshake process. I have been banging my head against the wall all day now, any help would be great.
Just adding the answer, it was an issue with the Oauth Library code and is now resolved.
-Jarred