Layer3x Execution control for AI-driven payments. Layer3x is the authorization firewall that sits between an AI agent's payment decision and the actual movement of money. Nothing executes without passing through it.

The problem AI agents can now initiate, approve, and route payments. That's powerful — and it introduces a failure mode that model-layer safety cannot reach. An agent can make a perfectly correct decision — policy-compliant, human-approved, fully authorized — and still execute the wrong payment. Because the payload can change between the decision point and the rail. Wrong amount. Wrong account. Wrong vendor. Every upstream system shows green. The money moves. This is not a model problem. It's an execution problem.

The proof point

A $240K wire was authorized by an AI agent. Hash verified at the moment of authorization. By execution time, the payload had changed. Layer3x detected the delta, issued FROZEN, and halted the transfer. The wire never moved. No upstream system would have caught it.

This is the failure class that prompt engineering, policy layers, and model evals cannot prevent. It requires an execution-layer control.

How it works AI Agent → Policy Decision → [ Layer3x Execution Controller ] → Payment Rail ↑ GO / NO-GO / ESCALATE before money moves Every payment instruction is hash-bound at authorization. At execution time, Layer3x re-validates the full payload signature. If a single byte has changed, the transfer is frozen before it reaches the rail. Control signals SignalMeaningALLOWPayload matches authorization. Execute.DENYPolicy violation. Block and log.ESCALATEThreshold exceeded. Route to human review.FROZENPayload integrity failure. Hard stop. Full audit trail. Action key tiers Layer3x uses tiered action keys to scope what each agent or integration can do:

Low risk — draft creation, read operations, status checks Medium risk — payment initiation up to defined thresholds High risk — wire release, bulk disbursement, high-value transfers

Each action key is scoped, logged, and revocable independently.

Key capabilities

Payload integrity — hash binding from authorization through execution. Detects any modification in transit. Execution lifecycle visibility — every request moves through defined states: PENDING → AUTHORIZED → EXECUTING → SETTLED (or FROZEN / DENIED). No silent failures. Risk-tiered controls — configurable thresholds by amount, vendor, agent identity, and action type. Reconciliation — every execution is linked to its originating authorization. Auditable end-to-end. Timeout enforcement — silent execution timeouts are caught and surfaced. No hanging transactions. Multi-tenant isolation — agent policies, action keys, and audit trails are fully isolated per tenant.

Architecture Layer3x operates as a proxy endpoint between your orchestration layer and your payment rail. ┌─────────────────────────────────────────────────────┐ │ Origination │ │ AI Agent ──► Orchestrator ──► Layer3x API │ └─────────────────────────┬───────────────────────────┘ │ ┌─────────────────────────▼───────────────────────────┐ │ Authorization │ │ Policy check → Hash binding → GO/NO-GO/ESC │ └─────────────────────────┬───────────────────────────┘ │ ┌─────────────────────────▼───────────────────────────┐ │ Execution │ │ Payload re-validate → Rail handoff → Confirm │ └─────────────────────────┬───────────────────────────┘ │ ┌─────────────────────────▼───────────────────────────┐ │ Settlement │ │ Reconciliation → Audit trail → State close │ └─────────────────────────────────────────────────────┘ The model is simple: no payment executes without a GO signal from the execution controller. The controller owns the gap between decision and movement.

Who this is for

Fintech platforms building AI-native payment workflows Enterprise treasury teams adopting AI agents for payment operations Compliance and risk teams who need execution-layer auditability — not just model-layer logging Engineering teams who need a drop-in execution controller, not a policy rewrite

Demo scenario The SkyPay demo runs 10 request scenarios through the execution controller: ScenarioOutcomeStandard auto-approvalALLOWAmount above thresholdESCALATEInsufficient fundsDENYSilent execution timeoutFROZENVendor rate limitingESCALATENew vendor verificationhold for reviewHash mismatch on wire transferFROZEN — the proof point The hash mismatch scenario is the one that matters. Every other control exists in existing payment infrastructure. This one doesn't.

Status Layer3x is in active development. Partner demos available. Contact: contact@layer3x.com