AISkills402: Base Receipt Verify

Name: AISkills402: Base Receipt Verify
Price: 0.005 USD

x402

AISkills402: Base Receipt Verify is a paid API for AI agents from api.aiskills402.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-17).

Verifies on Base mainnet that a specific transaction genuinely paid USDC to an address, returning status, transfer details, payer, amount, and EIP-3009 nonce from chain logs

Price / call$0.005

Seller volume →—

Success—

StatusUnknown

How this service works

Base Receipt Verify API: checks on Base mainnet that a transaction really paid USDC to an address - status, transfer, amount, payer and EIP-3009 nonce from the chain logs, never from the relayer. Base mainnet USDC only. $0.005 USDC per check, a live measurement. POST JSON {tx, pay_to, amount_micro?, from?, nonce?}; free example at https://api.aiskills402.com/v1/run/base-receipt-verify/example

Output

Returns a JSON object with a 'verdict' field (e.g. 'confirmed'), a 'checks' sub-object showing whether the recipient, sender, nonce, amount, transaction status, and asset type each match, a 'transfer' object with the actual on-chain from/to/value_micro values, block number, confirmation count, latest block, EIP-3009 authorization details including nonce and authorizer, timestamp of the check, and which node answered. Also includes a top-level 'ok' boolean and 'replay' flag.

Example use cases

Confirm customer USDC payment received

“A customer says they paid us 5000 micro-USDC on Base — here's the tx hash 0xa1b2c3...f9e8, and our receiving address is 0x8e37022edcf0f21cf3c9f93fee9d4d32519f36f4. Can you verify on-chain that the payment actually went through and hit the right address for the right amount?”

Audit agent-relayed payment without trusting relayer

“I have a transaction 0xd4e5f6...1a2b from a relayer claiming they forwarded 10000 micro-USDC to 0xabc123...def456 on Base — don't trust the relayer's word, go check the actual chain logs and tell me if the transfer really happened, who the original sender was, and whether the EIP-3009 nonce matches 0x61a1b7ac2ab9f8c22da20dc2802be3c298f8a7e5d598fc8c5d09d7b5de28f1ca.”

Validate payment before releasing digital goods

“Before I release the download link, check Base mainnet transaction 0x7c8d9e...0f1a2b and confirm it paid exactly 50000 micro-USDC to our wallet 0x1234abcd...5678efgh — I need to know it succeeded, wasn't replayed, and came from address 0xsender...address.”

Technical details

Endpoint

POSThttps://api.aiskills402.com/v1/run/base-receipt-verify?utm_source=zero.xyz

When to prefer

Use this endpoint when you need to independently verify a USDC payment on Base mainnet directly from chain logs without relying on a relayer's report. It is ideal for trustless payment confirmation in agentic workflows, release-on-payment automation, and fraud prevention where a relayer or counterparty could falsify receipts. Prefer it over reading relayer state when EIP-3009 nonce verification is needed or when the amounts/addresses must be cryptographically confirmed on-chain.

Side effects

Transaction hash not found on Base mainnet — returns found:false
Transaction found but status is not success (e.g. reverted) — verdict will not be 'confirmed'
Amount mismatch — amount_matches check returns false if on-chain value differs from amount_micro
Recipient mismatch — to_matches check returns false if pay_to doesn't match actual recipient
Asset is not Base USDC — asset_is_usdc_base returns false
Invalid transaction hash format — schema validation error on tx field
Network or RPC node unavailable — upstream error from base.drpc.org
Payment for the API call itself insufficient — x402 402 response if USDC not sent

Input

Schema · Request body

Field	Type	Description
tx	string	Transaction hash on Base mainnet.
from	—	Expected payer (the transfer sender, not the relayer); null = do not check.
nonce	—	Expected EIP-3009 authorization nonce; with from, also asked of the chain when the receipt is unknown.
pay_to	string	The address that should have received USDC.
amount_micro	—	Expected amount in USDC micro-units (6 decimals); null = do not check.

Output

Schema · Response

{
  "type": "json",
  "example": {
    "ok": true,
    "skill": "base-receipt-verify",
    "engine": "1.0.0",
    "replay": false,
    "result": {
      "block": 52689216,
      "found": true,
      "checks": {
        "to_matches": true,
        "from_matches": null,
        "nonce_matches": null,
        "amount_matches": true,
        "status_success": true,
        "asset_is_usdc_base": true
      },
      "status": "success",
      "verdict": "confirmed",
      "findings": [],
      "transfer": {
        "to": "0x8e37022edcf0f21cf3c9f93fee9d4d32519f36f4",
        "from": "0xa340966d806f114483d671f6bf934daebbdff8dc",
        "value_micro": "3000"
      },
      "checked_at": "2026-10-16T17:26:09.575Z",
      "answered_by": "base.drpc.org",
      "nodes_asked": 1,
      "nonce_state": null,
      "latest_block": 52691111,
      "authorization": {
        "nonce": "0x61a1b7ac2ab9f8c22da20dc2802be3c298f8a7e5d598fc8c5d09d7b5de28f1ca",
        "authorizer": "0xa340966d806f114483d671f6bf934daebbdff8dc"
      },
      "confirmations": 1895
    },
    "receipt": {
      "tx": "0x<settlement transaction>",
      "settled": true
    },
    "refusal": null,
    "input_sha256": "<sha256 of the request>"
  }
}

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