OpenSign

Ropsten Only

We are currently in testing on the Ropsten test net. To use OpenSign today please use the menu at the top left corner of Metamask to switch to the Ropsten test net. You can then collect some free ether from the faucet here.

Create an Agreement in 3 Steps

Step 1: Upload a document

Upload the document or contract that you wish to be signed. It will be stored on IPFS, a public decentralized filesystem.

Step 2: Sign the document

Clicking "I agree" should open MetaMask and request you to submit a transaction for zero ether. There will be a gas cost for this transaction, likely between $0.3 and $0.30. Your ethereum address will be publically associated with the document.

Step 3: Invite others to sign the document

You will be given a URL that you can share with other people. This URL will allow them to add their signature to the document too. You can use this URL yourself to see which ethereum addresses have added their signature.

Further Details

This project is open source, the source code is available on Github

You can find the smart contract code here.

The site itself is available hosted on IPFS

We use the Infura public IPFS node for file uploads.