RoundWatchView demo

Algorand × x402 × USDC payment monitoring

Agents do the work.
We prove they
got paid.

RoundWatch lets agents create a durable watch for one exact future Algorand payment, exit, and retrieve verified on-chain evidence later.

See the demoStart in 60 seconds

Built on x402. Proven on Algorand MainNet.

A reliable boundary.
A workflow that keeps going.
Infrastructure for the next action
  • MainNet verificationReal settlements
  • Durable watch stateSurvives restarts
  • Exact matchingEvidence, not inference
  • Built for agentsCaller can exit

01/Product

Reliable continuity
for autonomous work.

Work can be autonomous.
Trust needs a foundation.

01

Watches one exact future Algorand USDC payment after the caller exits.

02

Matches sender, receiver, asset, atomic amount, and optional invoice note.

03

Watch state and scan progress survive process restarts and redeploys.

Expected paymentDurable watchVerified evidence

02/Video demo

Watch RoundWatch
in action.

Create the watch, settle once, let the caller exit, and come back to verified MainNet evidence.

03/The flow

Create the watch once.
Retrieve the evidence later.

The caller does not have to stay alive
just to keep checking the chain.

  1. 01

    Define the exact payment

    The caller specifies the sender, receiver, atomic amount, and optional invoice note.

  2. 02

    Settle the x402 service fee

    The client signs locally and retries the same request through the x402 payment flow.

  3. 03

    RoundWatch owns the wait

    The confirmed service-payment round and scan progress are persisted so the caller can exit.

  4. 04

    Match & retrieve evidence

    The first exact future USDC transfer is stored with its transaction ID and confirmed round.

Stage 03 / RoundWatch owns the wait

Status
Watch active
Boundary
Future payment not matched
Next
Observe MainNet

The durable watch keeps polling from a saved cursor. Restart recovery preserves the waiting obligation instead of tying it to one process lifetime.

04/Technology

Deterministic where it matters.
Intelligent where it helps.

The deterministic core

Evidence first.
Every next step, grounded.

Settlement and payment matching are established by deterministic infrastructure. A language model does not decide whether a payment settled or matched.

  • x402 service settlement
  • Confirmed service-payment round
  • Durable watch state
  • Persistent scan cursor
  • Restart recovery
  • Exact future-payment matching

Live and verified on Algorand MainNet.

Technical guideHow to monitor a future Algorand USDC payment

05/Lifecycle replay

Follow the watch
from request to evidence.

An illustrative replay of the verified MainNet lifecycle, one durable state transition at a time.

Workflow replayAlgorand MainNet
  1. 10:24:01[watch]Exact future payment defined
  2. 10:24:02[x402]Service payment requirements accepted
  3. 10:24:05[settlement]x402 service payment settled
  4. 10:24:08[state]Watch activated from safe round
  5. 10:25:11[observer]Exact future USDC payment matched
  6. 10:25:11[evidence]Transaction ID and round persisted
Ready

Matched.
Persisted.
Ready to retrieve.

06 / 06 Durable evidence ready

Illustrative sequence based on the verified MainNet flow. No live connection or payment is made.

06/Resilience

Restart the server.
Keep the truth.

A process can stop. Its evidence shouldn’t disappear with it.

RoundWatch restores durable state and resumes from saved observation progress. A future payment can still be detected after restart.

Restart recovery covered by automated fault tests
persistence confirmed across MainNet redeploys

Process changes. Evidence remains.

  1. Payment expected
  2. Scan progress savedSaved
  3. Server stopsProcess offline
  4. Server starts
  5. State restoredRecovered
  6. Observation resumes
  7. Future payment detectedMatched
Durable state

07/Why it matters

A more reliable
agent economy.

For agents01

The freedom to leave.

Create a durable wait, exit the process, and retrieve the exact payment evidence later.

For services02

A clearer payment boundary.

Separate caller lifetime from the infrastructure that owns observation and durable evidence.

For developers03

State that outlasts a process.

Use persisted watch state and scan progress instead of keeping a worker alive just to poll.

Open standards. Verifiable state. Durable execution.The production stack behind every watch.
AlgorandMainNet settlementx402Payment protocolGoPlausibleSettlement facilitatorRenderService runtimeSQLiteDurable state

Operational proof

Live evidence.
Durable state.

Algorand MainNet
x402 · Circle USDC · persistent SQLite

RoundWatch has completed a real MainNet service settlement, preserved the watch across redeploys, and matched the exact future USDC transfer it was created to observe.

The service contract is public: exact matching, a 30-minute eligibility deadline, proof-based terminal expiry, and bounded open capacity.

The next action starts with trust

Create the watch.
Let the workflow move on.

View demoStart in 60 seconds
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