Woodpusher is a good researcher. Perhaps he can find the correspondence between Ambassador Armstrong and President Madison which I never could find.I found the order form Madison to secure McClure's release, but I never found much in the way of correspondence between Armstrong and Madison.
https://www.loc.gov/item/mjm022747/
James Madison to John Armstrong, December 29, 1813. Notes on General McClure. 4 pp.
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https://www.loc.gov/item/mjm022724/
James Madison to John Armstrong, January 14, 1814.
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https://www.loc.gov/item/mjm022727/
James Madison to John Armstrong, September 18, 1813.
View 5 images in sequence.
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https://www.loc.gov/item/mjm022728/
James Madison to John Armstrong, October 8, 1813. Extract.
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https://www.loc.gov/item/mjm022730/
James Madison to John Armstrong, October 11, 1813.
They are hard to read, and hard to get loaded on my machine. I have a slow connection and an old browser.
But I will look through the rest to see if I see any mention of James McClure.
Due to the serious nature of what McClure was doing in Europe, I cannot believe Armstrong did not discuss the matter with Madison.