Thanks for the response John. The best I can tell, they have gone to a subscription/registration scheme. I can't tell so far that they're going to charge anything to access the service. Maybe in production, but that's not a problem. The examples they give accessing their service is in VB and I'm having a bit of trouble translating it.

I have written a web service in C# and am consuming it from a VFP8 client but that's the extent of my experience in this area. I've been thrown into this project head first. Any help would be greatly appreciated.

>>Does anyone have any experience with the USPS web services tool kit? It seems to be a free service for looking up correct US address and zip codes.
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>Yes, I had some code that worked for a while, but now returns 00000 when an address is passed. I think they may have gone to a pay format. I went ahead and subclassed IE and navigate to the page, populate it, click, then pull the data from the html page. It's a pain and much slower than a WS, but it works.
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>John