A developer encountered issues implementing a real x402 exact payment flow on Arc Testnet because existing x402 facilitators either required managed onboarding or lacked support for Arc's exact payment flows. The user had to build a custom solution. The request is for main x402 facilitators to offer better, unmanaged support for Arc Testnet exact payment flows.
Last night I almost cut Arc from the @useOmniClaw demo. OmniClaw already supports @circle Nanopayments when the seller supports that path. But for this demo, I needed something else: a real x402 exact payment flow on @arc Testnet. Not a mock. A real buyer pays, a real seller unlocks, and settlement lands on Arc. That is where it broke. The main x402 facilitators did not give me a clean way to run this Arc demo. Some require managed onboarding. Some do not support Arc for exact payment flows. So I had two options: wait, or build the missing piece myself. I built it. omniclaw facilitator exact --network-profile ARC-TESTNET --port 4022 By morning the full flow was live: buyer agent -> OmniClaw policy engine -> vendor kiosk -> self-hosted x402 exact facilitator -> Arc USDC transferWithAuthorization -> paid resource unlocked On-chain proof: https://t.co/kCm3JaEjyi This is now part of OmniClaw. If you want to run x402 exact on Arc without waiting on external onboarding, you can self-host the facilitator path yourself. pip install omniclaw