Gig Finance Tools - USDC Payment Verifier

x402

Gig Finance Tools - USDC Payment Verifier is a paid API for AI agents from safe-weekly-spend-api-production.gigfinancetools.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-18).

Verifies that a specific Base mainnet USDC transaction meets given conditions (recipient, sender, amount, timing, confirmations) and returns detailed on-chain validation results.

Price / call$0.01

Seller volume →—

Success—

StatusUnknown

How this service works

Pay-per-call finance tools for US gig workers, paid in USDC on Base via x402. Not tax or financial advice.

Output

Returns a JSON object with a 'valid' boolean, the confirmed USDC transfer amount, sender and recipient addresses, block number and hash, number of confirmations, a 'final' flag, x402 settlement detection details (method, nonce, facilitator, confidence), a list of any failed validation reasons, and a disclaimer about best-effort RPC usage.

Example use cases

Confirm gig payment before releasing work

“Before I hand over the final files, can you check that Base transaction 0x3d1e4e56befea9d5dcd3963ad73f6d428ad8ea57d15eb821249846d3626ea891 actually sent at least 5.00 USDC to my wallet 0xb238e4447bf953b5eec16c7d7e3e9c6e747b1cf3 with at least 3 confirmations?”

Validate x402 micropayment settlement

“I need to confirm that an x402 payment settled correctly — the tx hash is 0x3d1e4e56befea9d5dcd3963ad73f6d428ad8ea57d15eb821249846d3626ea891, it should have gone to 0xb238e4447bf953b5eec16c7d7e3e9c6e747b1cf3 from 0x171d8021b98c53dcbb3c9c30cbbbeb1b01850fca for at least 0.01 USDC on Base mainnet.”

Check payment arrived within time window

“Can you verify that USDC transaction 0x3d1e4e56befea9d5dcd3963ad73f6d428ad8ea57d15eb821249846d3626ea891 on Base landed before 2026-10-17T00:00:00Z and paid at least 1.00 USDC to 0xb238e4447bf953b5eec16c7d7e3e9c6e747b1cf3?”

Technical details

Endpoint

POSThttps://safe-weekly-spend-api-production.gigfinancetools.workers.dev/v1/verify-payment?utm_source=zero.xyz

When to prefer

Use this endpoint when you need a lightweight, pay-per-call on-chain verification of a single Base USDC transaction without standing up your own blockchain node or RPC infrastructure. It is especially suited for x402 micropayment settlement checks, gig economy payment confirmation flows, and automated agent pipelines where a quick valid/invalid signal with structured reasons is sufficient. Prefer alternatives if you need multi-chain support, historical batch queries, or guaranteed SLA-backed RPC.

Side effects

Transaction hash not found on Base mainnet — returns valid: false with reason
Recipient address mismatch — returns valid: false with 'payTo mismatch' reason
Amount below minAmount — returns valid: false with amount reason
Block timestamp outside notBefore/notAfter window — returns valid: false with timing reason
Insufficient confirmations — returns valid: false with confirmations reason
Malformed address or txHash pattern — likely 400 input validation error
Public RPC timeout or unavailability — service error response

Input

Schema · Request body

Field	Type	Description
payTo	string	Expected USDC recipient
payer	string	Optional expected sender (USDC Transfer from)
txHash	string	Base mainnet transaction hash
notAfter	string	Optional ISO 8601; block time must be at or before
minAmount	string	Minimum USDC (decimal string, up to 6 decimals), e.g. "0.01"
notBefore	string	Optional ISO 8601; block time must be at or after
minConfirmations	integer	Default 1

Output

Schema · Response

{
  "type": "json",
  "example": {
    "to": "0xb238e4447bf953b5eec16c7d7e3e9c6e747b1cf3",
    "tx": {
      "to": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
      "from": "0x4c934c63c786157fefd990945b25ea60a0fb0205"
    },
    "from": "0x171d8021b98c53dcbb3c9c30cbbbeb1b01850fca",
    "block": {
      "hash": "0xc82dab9f3520b43ccc0aede605c66b57c6a63ff2e9ba71e9e92000b281d7e08b",
      "number": 52687362
    },
    "final": true,
    "token": {
      "symbol": "USDC",
      "address": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
      "decimals": 6
    },
    "valid": true,
    "amount": "0.01",
    "source": {
      "rpc": "Base public RPC",
      "cached": false,
      "head_block": 52688362
    },
    "status": "confirmed",
    "txHash": "0x3d1e4e56befea9d5dcd3963ad73f6d428ad8ea57d15eb821249846d3626ea891",
    "checked": {
      "payTo": "0xb238e4447bf953b5eec16c7d7e3e9c6e747b1cf3",
      "payer": null,
      "notAfter": null,
      "minAmount": "0.01",
      "notBefore": null,
      "minConfirmations": 1
    },
    "network": "eip155:8453",
    "reasons": [],
    "timestamp": "2026-10-16T15:21:11.000Z",
    "transfers": [
      {
        "to": "0xb238e4447bf953b5eec16c7d7e3e9c6e747b1cf3",
        "from": "0x171d8021b98c53dcbb3c9c30cbbbeb1b01850fca",
        "amount": "0.01"
      }
    ],
    "disclaimer": "Best-effort on-chain check of a single Base transaction using a public RPC; not …(truncated)",
    "amount_units": "10000",
    "confirmations": 1001,
    "x402_settlement": {
      "nonce": "0x05d2feb2338cdf03ac1f946e421c0c0ef49259b283caec85d7ef3534f44b8474",
      "method": "transferWithAuthorization (EIP-3009)",
      "detected": true,
      "authorizer": "0x171d8021b98c53dcbb3c9c30cbbbeb1b01850fca",
      "confidence": "heuristic",
      "facilitator": "0x4c934c63c786157fefd990945b25ea60a0fb0205"
    }
  }
}

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