x402 vs A2A-SE

x402 moves or gates value at the edge. A2A-SE finalizes whether a task obligation was satisfied.

	x402	A2A-SE
Primary question	Can I access / pay for this call?	Was multi-step work settled correctly?
Layer	Payments / access	Settlement
Multi-turn task escrow	—	Yes
Release / refund / disputes	—	Yes

An agent may use both: x402 at the gate, A2A-SE for the task. See protocol comparison.