TJAR deployed across seven blockchain networks at launch, with Uniswap Labs publishing developer documentation, contract deployment addresses, and audit reports.

From the articleUniswap Labs opens fee conversion tool TJAR to apps, starting with RobinhoodAlso in Uniswap's Token Jar lets apps collect fees in a single token of their choice, Uniswap Labs launches TJAR with Robinhood as first partner, Cryptocurrency News - Investing.com