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P0 Agent Economy Index — Payment Verification
x402
P0 Agent Economy Index — Payment Verification is a paid API for AI agents from x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-12).
Verifies whether a specific on-chain token transfer (USDC, USDT, WETH, etc.) meets expected payment criteria by checking transaction hash, recipient, asset, amount, and confirmation status
Price / call$0.003
Success—
StatusUnknown
How this service works
An open index of the machine-to-machine (agent) economy. x402 routes: ranked discovery over the live x402 service market, every indexed service scored by real 30-day calls and paying-wallet bounds, with a receipt naming the snapshot hash and scoring revision. /economy routes, for Tempo MPP, Virtuals ACP, Olas, Masumi, ERC-8004 agent registries, Solana agent registries, Base agent contracts and MCP servers (Official MCP Registry): each protocol's published figures (agent or server counts, transactions or payment events; payers and USD volume only where the source publishes them: payers for x402 and Tempo MPP, USD volume for x402 and Virtuals ACP), each with its unit, window and source; units differ, so totals are not summed. L402 and per-service MPP listings are not covered.
Output
Returns a JSON object with a boolean `verified` field, a human-readable `reason` (e.g. 'paid'), the raw and formatted amounts paid vs. expected, chain, asset contract address, block time, confirmation count, suggested confirmation threshold, an explorer URL, finalization status, and a note about data observation caveats. Allows the caller to decide whether to treat a payment as final.
Example use cases
Confirm x402 service payment receipt
“Check whether the Base transaction 0xa0dbae3236...d9fd actually paid at least 0.003 USDC to 0x17192bd2e8893e4ea0ab5db67adbf38ae42e9931 — I need to verify it before releasing the API response.”
Validate agent-to-agent micropayment
“My agent just sent a USDC payment on Base with tx hash 0xabc123... to wallet 0xdef456... for 0.01 USDC — can you confirm the transfer went through and has enough confirmations to be treated as final?”
Audit crypto payment before service delivery
“Before I unlock this content, verify that tx 0x999...fff on the Ethereum network transferred at least 0.05 USDC to address 0xAAA...BBB and tell me the block time and how many confirmations it has.”
Technical details
Endpoint
GEThttps://x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev/pay/check?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to programmatically confirm that a specific on-chain token transfer (EVM chains: Base, Ethereum, Arbitrum, Polygon) met payment conditions — correct recipient, sufficient amount, right asset — before releasing a service, content, or agent action. It is purpose-built for x402 and machine-to-machine payment flows where an agent needs a lightweight, low-cost ($0.003) cryptographic receipt confirming payment. Prefer this over a full blockchain node query when you don't want to run your own RPC infrastructure but need fast, structured payment verification with confirmation guidance.
Side effects
- Transaction not found on specified chain — verified=false with reason explaining lookup failure
- Amount paid is less than expected — verified=false with both paid and expected amounts returned
- Wrong recipient address — verified=false with mismatch details
- Transaction still pending / insufficient confirmations — verified=false or verified=true but confirmations < suggestedConfirmations
- Unsupported asset or chain — error or unverified response
- Native coin transferred via internal contract call not detected — noted in response caveat
- Invalid transaction hash format — request validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"to": "0x17192bd2e8893e4ea0ab5db67adbf38ae42e9931",
"tx": "0xa0dbae3236a486c4f7285206f416694bba403f95969dfa3d94a28e8f2538d9fd",
"from": "0x4cad6ec90e65babec9335cad728ddc610c316368",
"note": "Observation of public chain data at checkedAt, not a settlement guarantee, escrow or identity proof. Native coin moved by a contract's internal call is not seen (only a direct transfer to 'to'). Compare confirmations with suggestedConfirmations before treating a payment as final.",
"paid": {
"raw": "13631",
"amount": "0.013631"
},
"asset": "USDC",
"chain": "base",
"reason": "paid",
"source": "mainnet.base.org",
"status": "success",
"expected": {
"raw": "11940",
"amount": "0.01194"
},
"explorer": "https://basescan.org/tx/0xa0dbae3236a486c4f7285206f416694bba403f95969dfa3d94a28e8f2538d9fd",
"verified": true,
"blockTime": "2026-10-05T12:54:09.000Z",
"checkedAt": "2026-10-05T12:55:02.892Z",
"finalized": null,
"blockNumber": 52207751,
"assetContract": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
"confirmations": 27,
"suggestedConfirmations": 1
}
}Tags
x402
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