Paste a signed raw transaction (see who signed it, what it calls, and simulate it before it's sent), calldata, revert data, ABI-encoded bytes, or an event log as JSON. Nested calls — multicalls, Multicall3, Safe, Universal Router commands — are decoded all the way down; unknown selectors get their parameter layout recovered from the encoding itself. Brand-new contract? Paste its bytecode, its deploy tx hash (even while pending) or its address — the interface is read straight from the code and you can call it right here, no waiting for an explorer to index it.