P402 Meter prices every AI token in USDC and settles it on Arc in real time. Prior authorization review is the proof — 55+ onchain events per run, sub-$0.01 per action, governed by Gemini. Try doing that on Ethereum or Stripe.
What this provesAI compute can be metered, priced, and settled at token granularity — making per-action billing economically viable for the first time.
De-identifiedNo PHIAdmin Only
Session—
Billed $0.000000 / $0.50 cap
READY
Onchain Events
0
50+ required for proof
Arc Settlements
—
$0.006/tx gas
Avg Cost / Event
—
must be ≤ $0.01
vs ETH Mainnet
—
cost saving
01Document Intake
Prior Auth · Gemini Multimodal
De-identified · Administrative only · No PHI
Approval required
02Gemini Extraction
Awaiting Document
03UM Review Summary
Waiting
Review summary will appear here during execution
No work order
04Economic Ledger
$0.000000
Awaiting economic events
Budget Cap$0.50
Session
—
Final Cost
—
Proof Status
PENDING
06Governed Outcome
Awaiting Review Completion
⚡Why Every Other Rail Fails at This
Track: Usage-Based Compute Billing
Network
Gas / Settlement
AI Tokens
Total / Action
Ethereum Mainnet (30 gwei)
~$2.85
~$0.0003
~$2.85
Stripe (2.9% + $0.30 min)
$0.30 min
~$0.0003
~$0.30+
Base L2 (typical)
~$0.02
~$0.0003
~$0.020
Arc Testnet (USDC gas)
$0.006 USDC
~$0.0003
~$0.0063
Arc is the only settlement layer where real-time per-token AI billing works
Stripe's $0.30 minimum means you need to batch 300+ sub-cent actions before you can bill them — destroying the real-time pricing model. Ethereum gas at $2.85/tx makes each settlement more expensive than the AI work itself. Arc uses USDC as native gas at $0.006/tx — the only rail where every token can settle individually.
Per-Action Cost
≤ $0.01
AI tokens + Arc settlement
Onchain Tx / Run
50+
1 event per token chunk
vs ETH Mainnet
>99.7%
cost reduction per tx
Circle Infrastructure
Session funding via Circle Developer-Controlled Wallets (ARC-TESTNET) · Sub-cent settlement via Circle Nanopayments API · Gateway domain 26 on Arc testnet