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Field notes on agentic payments, protocol interop (x402 / AP2 / ACK-Pay), and the Japan compliance line — from the team running 5 production payment MCPs.

Jun 24, 20269 min read
Shipping agentic payments in Japan: the compliance line every team hits
x402, AP2 and ACK-Pay let AI agents pay autonomously — but in Japan the wrong USDC flow turns you into an unlicensed money transmitter. Here's the exact line, and how to stay on the legal side of it.
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