A Google Groups thread reported a minor scare from some advanced AdWords advertisers. They noticed that Google's AdWords API all of a sudden stopped returning data for the KeywordMinCPC. Advertisers were nervous that they would no longer be able to see a keyword's minimum cost per click.
Jeff Posnick from the AdWords API Team reassured us it was a minor and short bug. He said that it was excluded for a bit, but did not explain why Google excluded that data. Some theories have to do with the new quality score that went into place last week. But he said it was back and back to stay.
I've just received assurances from the reports team that KeywordMinCPC will remain a supported column.
Advertisers love this data and for reporting, it is an important metric for many advertisers.
Forum discussion at Google Groups.