Test credits only. Every valid intent stays Pending Sync. No settlement service is connected.

ECHO PAY · NEARBY / INTENT LAB

Echo Nearby

Internet optional.

Your intent. Your signature. Any carrier.

Carry a signed instruction between devices. Verify it locally, even without a connection.

Local verification

Awaiting a check

Run a check below. No current verification is displayed.

The Twin reflects your local check. You choose what to sign. A valid signature does not prove identity, funds or settlement.

How the signed handoff travels
  1. Agree on the receiver. Confirm full keys separately. In the signed exchange, the receiver creates a request and keeps its ID.
  2. Review and sign. The payer checks the amount, receiver and expiry, then explicitly authorizes the exact intent.
  3. Carry the same bytes. Use QR, an exported file or copied packet. A third carrier can pass it onward; the packet is readable.
  4. Check and retain. The receiver verifies locally and keeps an exported copy. Pending Sync remains pending; there is no settlement connection.

Prepare both devices before disconnecting. Scanning never approves an action. Open the two-device guide →

Try the signed request exchange →Download independent kitLoad this client before going offline.

01 / YOUR TEMPORARY TEST KEY

A key you choose to create

Signing keys stay in this tab's memory. Closing or hiding the tab discards the key. Saved intents remain verifiable.

Confirm the full recipient key separately. A familiar name or a QR code does not establish who controls it.

02 / CREATE

Review before signing

Network: echo-demo-local · Asset: test-credit · Whole test credits

No intent prepared.

03 / VERIFY

Check the object yourself

Recipient checking uses this lab's test-credit network and your device clock. A key pin does not verify a person's identity.

No verification performed.

Technical verification details



Watch the signature hold
After a successful check, change the amount in a separate copy and see why its original signature no longer verifies.


04 / RETAINED OBJECTS
Saved pending intents
Public signed objects only; no private keys. Browser storage can be lost or changed. Export files you need to keep.