Is there an online bitcoin api for signing a message?

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nezzard2017-03-23 15:24:20

bitcoin

nezzard, 2017-03-23 15:24:20

Good afternoon, I remember earlier blockchain.info had the opportunity to sign a message. I don't see this feature right now.
I'm interested in the question of whether there is somewhere some kind of online wallet with api and the ability to sign messages.
And slightly non-standard questions
1. Let's say I installed this module for node js https://bitcore.io/api/message/
How can I protect the private key from theft in case the server is hacked?
2. Is there a limit on message signing?