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I am looking for an API service that allows my web app to generate Ethereum a deposit address, detect and notify a callback URL when a user sends ether to that address, and forward the funds to "cold" addresses.

Is there such a service out there? If not is there another way of programmatically detecting and forwarding deposits without running one's own Ethereum node?

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5 Answers 5

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There is official Ethereum JavaScript API which offer a Javascript based API to interact with an Ethereum node.

To send a transaction you can use web3.eth.sendTransaction

web3.eth.sendTransaction(transactionObject [, callback])

which offers a callback too.

To create an address you can try LightWallet

generate a new address with keystore.generateNewAddress

keystore.generateNewAddress(pwDerivedKey [, num, hdPathString])
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You can check Blockcypher, it's the only public service I could find that offers notifications via webhooks and websockets.

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  • but this does not send web hooks if you are trying to work with erc20 tokens. Have you been able to see any workaround on erc20 transactions webhooks?
    – Oluwatumbi
    Commented Mar 27, 2018 at 15:53
  • If you work with tokens, you have a smart contract which emits events. You can listen for these events if you run a geth node.
    – ulu
    Commented Mar 28, 2018 at 13:19
  • I built the smart contract event webhooks for QuikNode: blog.quiknode.io/introducing-webhooks-for-ethereum
    – Auston
    Commented Jul 29, 2020 at 3:26
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Alchemy has a Notify API (available on the free tier) which allows you to create webhooks for transaction activity. It effectively allows you to detect whenever an address receives ETH. The forwarding logic will have to be done on your end of course since they don't store your private keys.

Here are the docs for the address activity webhooks, you basically input the account address you want to track and the webhook url you want data to be sent to: Alchemy Docs

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You can check this Telegram bot @MyETH_bot

It can:

  • check your addresses every 30 seconds
  • automatically send webhooks on each transaction of ETH and ERC20 tokens with data like: address, balance change, current balance, etc

Check https://myeth.io to learn more

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Alchemy provides notify which provides web-hooks for ether and other token based erc20 funds.

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