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zkBob is a privacy application which anonymizes transfers between users. The BOB stablecoin lets users exchange value in a stable, predictable manner. zkSnarks prove certain actions have occurred without revealing details about who completed the action or the amount transferred. Compliance features deter bad actors and illicit usage. zkBob gives privacy back to the everyday user.


๐Ÿ† 5 prizes of $2000 in BOB ($2000 USD equivalent) will be awarded.

  • ๐Ÿฅ‡ The top 5 projects utilizing the zkBob API will each receive a $2,000 prize. Creativity, innovation, and implementation will be considered during judging.


  • Build on Polygon
  • Use BOB custodial API (zkBob cloud) for private transfers

Use Case Ideas:

  • Donation platform where donors maintain anonymity
  • Fundraising platform with internal KYC while maintaining public privacy
  • DAO accounting application
  • Private payment-splitting application for friend groups
  • Wallet integration for private payments - integrate BOB payments into an open source wallet
  • Tip bot/extension (telegram bot, twitter bot, browser extension)
  • Food delivery service with private payments
  • BOB powered vending machine/POS
  • *Extra credit: Direct library integration, direct deposits


This workshop is happening in-person
zkBob ๐Ÿ›  How to Use zkBob Cloud in Your Application
Time: 04:00 PM IST โ€“ Dec 2, 2022
Location: Workshop Room 1

Getting Started

  • Get an API Key & BOB: Join the telegram at https://t.me/+sMbZvmVzYmQ3ODlk to request your API key. The API key is used to generate and interact with the zkBob cloud wallet. You will receive 10 BOB into the account to use for testing and demonstration.
  • HackMD: View the HackMD with extended API documentation and usage examples.
  • Explore API Methods: Use Swagger and Postman links to view available methods for shielded account interaction. Note that the current API does not include deposit and withdrawal functionality, only proving mechanisms related to transfers. Deposits and withdrawals may be performed manually.
  • Hackathon Hub: https://docs.zkbob.com/resources/hackathon