Choose a trigger

Choose a source, chains where relevant, subjects to watch, and filters. Example triggers help you inspect matching activity before enabling. Availability below describes this version of Tailflow; an example alone does not establish that a source can run automatically.

Token Transfer (ERC20): watch up to three selected tokens.

Transaction in Contract: watch transactions addressed to one contract, including reverted transactions.

Contract event: watch logs emitted by up to three contracts.

Token price: watch one token from the supported top-250 selection crossing a level.

Gas price: watch a level on selected chains. Each chain is evaluated separately.

NFT Transfer (ERC721), Uniswap Swap, and Aave Liquidation currently support exploring examples and designing flows, but do not execute automatically in this version. Do not rely on these flows for live alerts yet.

Their guides explain the available controls and data so you can evaluate and prepare a flow. NFT metadata can also be tested against NFT transfer examples.

The chain selection includes Ethereum, Base, Arbitrum, OP Mainnet, BNB Chain, Unichain, and Robinhood Chain. Availability of observations depends on the source; selecting a chain is not proof that it has a recent gas or protocol event.

Choose from the chains offered for your source in the app. A token, pool, or contract address must correspond to the selected chain. The same symbol on two chains need not identify the same asset.

A source being listed does not mean every asset or protocol deployment has recent activity. Check Example triggers for the exact selection. Token price is a market price for the selected token rather than a price for an individual pool or chain.