AFFIXIO
Offline payments
Offline agent payment verification
Some payment edges cannot depend on live central lookups. Offline-capable credentials with spent-proof anti-replay keep verification honest when the network is down. AffixIO supports QR presentation and local verify for agent payment permission.
Definition
Offline agent payment verification checks a signed payment permission locally at the edge, with spent-proof to stop the same credential authorising twice.
Field note. Offline agent checkout without spent-proof invites double-spend on reconnect. Mark proofs spent at first presentation.
QR and spent-proof at pay
Issue a payment permission credential the agent can present as QR or API payload. The edge verifier checks ML-DSA-65 signatures and spent-proof rules, then returns allow or deny.
Double-spend prevention marks a presentation consumed. A second present fails. Sync Merkle audit when connectivity returns.
Relation to online checkout
Online agentic checkout can use API verify only. Offline is for edges that cannot call home. Both share the same permission model and audit references.
See double-spend prevention and offline gate pages for the mechanics.
Production wiring for offline agent payments
Place issue at consent or policy satisfaction, then verify at the first external boundary. Deny should return a stable code for support. Allow should attach Merkle metadata to the record your finance or ops team already stores.
When WAN is unreliable, run local verify with cached keys and sync Merkle inclusion later. Offline QR and edge agents use the same spent-proof rules as online gates.
Platform risk
Payment edges go dark
Pop-up retail, transit-adjacent checkout, and field sales often lose connectivity. Agent spend still needs a defensible gate.
Live DB assumption
Authorisation that only works online fails at the worst moment.
Photocopied credentials
Static codes get reused without spent-proof.
PII on the device
Copying payer identity onto edge terminals multiplies risk.
Policy circuit
Agent payments that verify without live connectivity
Retail and field agents need payment permission that works when the link is down. Offline proofs with spent-proof rules and later Merkle sync keep verify honest after reconnect.
Issue offline-capable permission
Include spent-proof semantics.
Provision edge verifiers
Keys and anti-replay rules on the device or gateway.
Present at pay
Agent shows QR or submits proof.
Sync audit later
Upload Merkle refs after reconnect.
Go-live list
Readiness checks for offline agent payments
- List payment edges that must work offline.
- Enable spent-proof on permission presentations.
- Avoid storing payer PII on the scanner.
- Test double-present and deny paths.
- Document reconnect audit sync.
Engineer FAQ
Questions on offline agent payments
How is double spend prevented?
Spent-proof records mark a credential presentation as consumed at the verifier.
Must every payment use QR?
No. QR is one presentation form for offline edges.
Can we mix online and offline?
Yes. Same permission model, different verify path.
What about refunds?
Refunds stay with the payment stack. AffixIO gated the original permission.
Offline links
Pages that support offline agent payments
Agentic payments
More agentic payments briefs
Test offline agent payment gates
Run verify on disconnected sandbox profiles, then confirm spent-proof behaviour when sync resumes.