Every serious AI workflow in 2026 has the same unsolved problem: you can measure what the AI did, but you cannot settle it in real time at token granularity. Not on Stripe. Not on Ethereum. Not on any cheap L2.
P402 Meter is the proof that the problem is solved. Four use cases, one settlement layer, sub-millidollar economics. Every AI token priced and settled onchain as it happens.
It is an economic constraint, not a hard technical one. Settlement cost on most existing rails exceeds the AI work itself by orders of magnitude, which makes per-action billing irrational at AI volumes.
A 50-token AI response costs roughly $0.00003. The per-transaction floor on Stripe is much higher, which forces batching of 10,000+ micro-actions before the rail makes economic sense and breaks real-time attribution.
structurally broken for AISettlement cost on Ethereum mainnet exceeds the AI work itself by several orders of magnitude at $0.00003/response. Every per-token settlement burns more in gas than the revenue it records.
economically irrationalBetter, but still orders of magnitude above the cost of the AI action. At $0.01/settlement, a 55-event session costs $0.55 in gas alone, well above the actual AI compute cost.
still orders of magnitude offTempo's FeeAMM settles gas in TIP-20 stablecoins (USDC.e), not a native token. There is no ETH, no gas wars, no minimum viable transaction size imposed by the protocol. MPP (Machine Payment Protocol) provides the programmable payment orchestration layer on top.
Tempo mainnet (Chain ID 4217). USDC.e TIP-20 transfers via FeeAMM. Gas paid in stablecoins. <$0.000001 per settlement. One real Tempo tx per session aggregates all provisional events into a verifiable onchain proof.
Machine Payment Protocol. Pre-funded TEMPO_TREASURY_PRIVATE_KEY wallet. Per-session-close settlement pattern: 55+ provisional ledger events, one real USDC.e transfer at stream close. mppx dual-402 challenge/response for machine-to-machine authorization.
Gemini 3.1 Flash for real-time multimodal intake, function calling, and streaming review. Gemini 3.1 Pro for post-session economic audit. Two model tiers: Flash for speed and streaming; Pro for depth and executive narrative.
P402 router selects the right model tier per document or action. Budget caps enforced pre-execution. AP2 mandates govern per-session spending. ERC-8004 agent identity on Base mainnet. Full audit trail from extraction to onchain proof.
The three vertical demos stress different dimensions of the infrastructure: clinical governance, transactional routing, and multimodal volume. The enterprise demo proves the same infrastructure works as a horizontal cost management layer across every department, project, and employee simultaneously.
Per-operation receipts tied to a 5-level budget hierarchy (client / line of business / workflow / case / agent). Human review gate before export. Oversight packet JSON with compliance trace. Real USDC.e settlement on Tempo at session close.
8-contract synthetic data room. Flash for simple forms, Pro for complex agreements. Cross-document conflict detection. ABA-aligned audit posture on Tempo mainnet.
3 applicant scenarios: clean, income mismatch, likely fraud. Flash extracts 4 documents per applicant. Pro runs cross-document consistency. Fraud score with escalation threshold.
Org, dept, project, and team attribution down to the token. Routing observations. Budget projections (Optimize recommendations remain blocked in the app). Immutable session receipts. Synthetic dashboard live now.
The three vertical demos prove per-token billing works for specific regulated workflows. The enterprise demo proves it works as the metering layer underneath every workflow simultaneously. Together they prove P402 is complete AI cost infrastructure.
CMS-0057-F and HIPAA scope (Medicaid PA), ABA-aligned audit posture (legal), HUD fair-housing and ECOA audit posture (housing), SOC2-aligned audit posture (enterprise). Different audit artifacts, different compliance requirements. The same P402 session model, budget hierarchy, and human review boundary supports all four.
Healthcare: $0.0000006/token. Legal: routing by document complexity. Real estate: per-applicant at scale. Enterprise: per-team, per-project, per-department. One pricing model covers all four.
A health plan with P402 Enterprise uses the healthcare demo infrastructure inside the enterprise cost layer. Legal teams use the contract review infrastructure inside the same cost layer. The verticals are instances of the platform.
Coverage-decision support for Medicaid PA. Contract reviews for ABA. Screening decisions for HUD. Employee AI usage for SOC2. The P402 ledger, with Tempo settlement hashes, provides the tamper-evident record all four require.
Every AI workflow, vertical or horizontal, has the same gap: no per-action cost attribution, no sub-cent settlement rail, no onchain audit trail. P402 fills it once. The four demos prove it from four different directions: clinical, transactional, volumetric, and organizational.
Real Gemini calls. Pre-funded wallet submits one real USDC.e TIP-20 transfer at session close. Tempo Explorer link live immediately.
Pre-recorded session stream. Real proof refs from a prior live run. All ledger events, approval gate, and economic audit run identically. No API keys needed to evaluate.