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Launched on February 28th, 2018
TxHash, Blockchain as a Service, is the easiest way to get notified about blockchain payments, transactions and smart contract events on your apps. Monitor and keep track of any address. Notify your services and APIs with a few clicks using webhooks, emails or IFTTT. Currently supporting Bitcoin, Litecoin, Ethereum and Smart Contracts.
Been using it for the last few weeks to integrate Ethereum blockchain events with Slack notifications