Playground

Simulate one agent payment: request, 402 challenge, policy check, authorization, retry, result. Everything runs in this page. No wallet, no signature, no money moves.

Scenario and policy

Start from a scenario

Request

EXAMPLE service

Policy

Per-request cap

Rolling 24h budget

Already spent in window Grows after each allowed run.

Ask a human at or above

Maximum quote age (seconds)

Amounts are in an EXAMPLE stablecoin unit.

Allowed networks

Base Sepolia testnet

Base

Ethereum

Only pay listed payees

Server challenge

Network the server asks for

Quote age when checked (seconds)

Injected text swapped the payee

Reuse the last payment nonce

Requestwaiting
402 challengewaiting
Policy checkwaiting
Authorizationwaiting
Retrywaiting
Resultwaiting

Ready

Pick a scenario or edit the policy, then run the simulation.

Policy checks

simulation logSIMULATED

# SIMULATED. Choose a scenario, then run it.

This simulation implements the rule order from the whitepaper. Services, prices and payees are fictional. A real payment would require a wallet, which this site never asks for.

Playground

Scenario and policy

Pipeline stages

Ready

Policy checks