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OP Open Payment Address Protocol
Local-first no tracking

Secure payment flow

Complete this payment, step by step.

Start by confirming the selected web address. This browser then resolves, verifies and reviews every stage before payment can continue.

Confirm the payment address

This is the exact public URL selected on the homepage.

Selected URL

Preparing address…

Change address

Resolution and verification run locally in this browser. No payment controls are enabled yet.

Discovery and verification

Resolve first. Payment controls remain unavailable until a valid terminal record exists.

Preparing the selected payment address for secure resolution.

Local histories

Opt-in payment history stores only OPID, chain, transaction hash, timestamp and outcome. Separate OPID and page-association verification histories remember downgrade protection. Full IBANs, records, descriptions and signatures are never stored. Clearing removes all three histories, including downgrade-protection memory.

    Security and privacy boundaries
    • Publishers must support credential-free CORS; there is no proxy fallback.
    • DNSSEC hash conflicts, changed plans and contract mismatches block execution.
    • Monerium onboarding and APIs remain outside this application.
    • All four Gnosis production assets are blocked in this release registry.