I've got a file on my desktop called key.txt, and it's just a single line in it that is clearly some sort of API key.

Absolutely no memory of what it is for.

💩

Naming things :)

I have 2 passwords in my drawer in another country, both marked with a crude drawing of the service's mascot. If I ever lose my digital identity to a house fire or suffer partial amnesia from drug related brain damage, I can ask for them over the phone.

That's how it should be.

It's for that provider you need the key for. You'll know in the future ;)

Sell it on the dEep web. They will figure it out for you

Check the creation date, ref back to your calendar, see if that fires off some buried memory?

Bitcoin private key with 1000 Bitcoins you bought 10 years ago

Publish it and see if someone figures out what it is for

@ultrageoff this is actually really smart advice.

But, I deleted it already :)