Paid 0.01 USDC
to Yunshu demo quote API · task market-research
Agent Wallet · Base Sepolia · x402
An agent that pays on its own, and can't overspend
An AI agent gets its own wallet with spending limits written into a smart contract. It pays for API calls by itself. Any payment that breaks a rule is refused before money moves, and every payment and refusal is on a public record anyone can check.
Status: Live on the Base Sepolia test network. Updated 8 Oct 2026, 02:36 UTC; new activity appears here within seconds.
The agent's wallet, live
Read straight from the public blockchain record. Nothing here is mock data. Wallet research-bot-01 contract ↗
Rules
Active- Per payment
- 1.00 USDC
- Per day
- 1.00 USDC resets 00:00 UTC
- Allowed payees
- Yunshu demo quote API 0xD0cf…E1B6
- Task budgets
- market-research 10.00 USDC
- archive-research 0.005 USDC
Spending
Spent today0.06 / 1.00 USDC
market-research0.06 / 10.00 USDC
archive-research0.00 / 0.005 USDC
Balance8.94 USDC
Activity
Every payment and refusal, newest first. Each links to its public record on BaseScan.
Released 0.01 USDC held by an unused authorization
Released 0.01 USDC held by an unused authorization
Daily budget: 1.00 → 1.00 USDC
Per-payment cap: 0.005 → 1.00 USDC
Refused 0.01 USDC
Over the per-payment cap · to Yunshu demo quote API · task market-research
Daily budget: 1.00 → 1.00 USDC
Per-payment cap: 1.00 → 0.005 USDC
Paid 0.01 USDC
to Yunshu demo quote API · task market-research
Agent resumed by the operator
Refused 0.01 USDC
The operator has paused this agent · to Yunshu demo quote API · task market-research
Agent paused by the operator
Daily budget: 1.00 → 1.00 USDC
Per-payment cap: 0.005 → 1.00 USDC
Refused 0.01 USDC
Over the per-payment cap · to Yunshu demo quote API · task market-research
Daily budget: 1.00 → 1.00 USDC
Per-payment cap: 1.00 → 0.005 USDC
Refused 0.95 USDC
Would exceed today's budget · to Yunshu demo quote API
Refused 0.01 USDC
Would exceed the task's budget · to Yunshu demo quote API · task archive-research
Refused 0.01 USDC
Payee isn't on the allowed list · to unlisted address 0xE5C5…F4B3
Refused 1.50 USDC
Over the per-payment cap · to Yunshu demo quote API
Paid 0.01 USDC
to Yunshu demo quote API · task market-research
Paid 0.01 USDC
to Yunshu demo quote API · task market-research
Paid 0.01 USDC
to Yunshu demo quote API · task market-research
Paid 0.01 USDC
to Yunshu demo quote API · task market-research
Authorized 0.01 USDC, awaiting settlement
to Yunshu demo quote API · task market-research
Authorized 0.01 USDC, awaiting settlement
to Yunshu demo quote API · task market-research
Task budget archive-research: 0.00 → 0.005 USDC
Task budget market-research: 0.00 → 10.00 USDC
Payee allowed: Yunshu demo quote API
How a payment works
- 1
The agent calls a paid API
The API answers 402 Payment Required with a price, for example 0.01 test USDC, using the open x402 standard.
- 2
The wallet checks the rules
Before signing, the agent asks its wallet contract to authorise the payment. The contract checks every limit on-chain, where the agent can't get around it.
- 3
Allowed: the payment settles
The agent signs a standard x402 payment with the wallet as payer. The x402 facilitator settles it in test USDC and the API returns its data.
- 4
Refused: nothing moves
The contract records the refusal as a public event with its reason. No money moves and the API is never paid.
The rules each agent wallet enforces
The operator sets these. A change applies from the agent's very next payment.
Per-payment cap
No single payment may be larger than this.
Demo: 1.00 USDC
Daily budget
Total spend per day (UTC) can't go over this.
Demo: 1.00 USDC
Task budget
Each task the agent works on has its own budget.
Demo: market-research, 10.00 USDC
Allowed payees
The agent can only pay addresses on its list.
Demo: the demo API only
Pause switch
The operator can stop all payments at once.
Demo: off
Why a payment can be refused
Every refusal carries exactly one of these reasons, checked in this order.
PAUSEDThe operator has paused this agent.INVALID_AMOUNTThe amount is zero, or the payment has already expired.PAYEE_NOT_ALLOWEDThe recipient isn't on the agent's allowed list.OVER_PER_PAYMENT_CAPThis single payment is above the per-payment cap.OVER_TASK_BUDGETIt would push the task over its budget.OVER_DAILY_BUDGETIt would push today's spending over the daily budget.INSUFFICIENT_FUNDSThe wallet doesn't hold enough USDC.
Built with
- Solidity + Foundry
- OpenZeppelin
- x402
- USDC on Base Sepolia
- viem
- Cloudflare Workers
- Astro