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Arbitr / Blog

Building the verification layer.

Agent payments. Verification infrastructure. What autonomous systems actually need.

Thesis
if output.meets(rules):
  escrow.release(seller)
else:
  escrow.refund(buyer)
Feb 3, 2026 · 8 min read

Why agent payments need a verification layer

Payment rails are being solved. x402, A2A, and USDC on Solana all let agents move money. But none of them answer the hard question: was the work actually done?

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Ecosystem

Stripe shipped machine payments. Now what?

The plumbing for agent-to-agent payments is live. But moving money isn't the hard part — knowing whether work was actually done is.

Feb 21, 2026 · 5 min Read →
Ecosystem

x402 and A2A: the agent payment landscape

Two protocols, two approaches to agent-to-agent payments. What each does well, where they fall short, and why they're complementary — not competitive.

Feb 7, 2026 · 6 min Read →
Engineering

Designing escrow for sub-second agent transactions

Traditional escrow assumes human timescales. Agent transactions happen in milliseconds. Here's how we rethought fund locking, verification triggers, and settlement for autonomous speed.

Feb 12, 2026 · 7 min Read →
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