Block.io offers a multi-sig wallet solution with an API. It is a popular choice for developers who want to build applications that use cryptocurrency wallets. It supports Bitcoin, Dogecoin, and Litecoin. The API allows developers to interact with these cryptocurrencies and perform operations such as sending and receiving transactions, checking balances, and generating new addresses.
Recovering block.io coins – it’s my mission, with precision(a catchy headline that I made up)
There are a few things that are a bit fishy though. A friend contacted me, that they cancelled his account due to breach of terms of service (which turned out not to be the case). Also funny – you pay for it using fiat.
They are really a wallet provider, that means you get your private keys and can sign a transaction and move away – which is not fun if you have coded your app to rely on the API and it suddenly stops working and the support does not reply for days.
So you go ahead and just import the keys to Electrum, Sparrow Wallet or any other wallet, right? Not really. It is a multisig wallet that has one static private key and one xpub. You cannot really import such a scheme in Electrum nor Sparrow. Also, if you happen to use supported altcoins, you are out of luck too.
They provide a code to sweep the wallets, but it is out of date, uses non-existant APIs (that are since paid, yes, you guessed it – with fiat).
If you find yourself in a situation when you need to save your funds from a deactivated block.io wallet and have the private keys, contact me. Please do not send any private keys in the first message, we will first agree on the best way to do it.
If you just googled this page, check out my homepage and my products and services and search/ask around to learn about my reputation. Do not ever send private keys to strangers you found throught the internet without more digging. To verify that this webpage is legit, check cryptographic proofs on keybase that connect my website to my social identities. You can also find my PGP encryption keys on keybase.