Everyone gets a Plumbus.
$PLUMBUS is the shared test asset for the buildathon. Every submission uses it, so every track speaks the same currency. It lives on Base Sepolia, it is worth exactly nothing, and there is plenty for everyone.
Nobody really knows how a Plumbus is made. First they take the dinglebop, then they smooth it out with a bunch of schleem. Everyone has a Plumbus in their home. Now you do too. To know more about Plumbus click here.
Claim your Plumbus
Using $PLUMBUS in your track
Track 1: AI Agents × DeFi
Build an autonomous agent that trades, lends, or allocates $PLUMBUS, wrapped in guardrails that keep a fast, fallible agent inside its mandate. It acts; it never holds the keys.
Track 2: Zero-Knowledge Finance
Prove a balance, a transfer, or full solvency in zero knowledge, showing it's true while revealing nothing. $PLUMBUS is the state you're hiding.
Track 3: Stealth Payments & Account Abstraction
Stealth addresses, smart accounts, intent-based flows. Move $PLUMBUS so no observer can link sender to receiver.
New to ERC-20s? The developer guide covers getting gas, adding the token to MetaMask, and integrating from Solidity, TypeScript, or Rust.