# agent402.tools USDC Payment Verification

> agent402.tools USDC Payment Verification is a paid API for AI agents from agent402.tools, paid per call via x402, $0.004/call, status unknown (last checked 2026-10-13).

Verifies whether a USDC transaction hash settled on-chain and returns the transfers it contains, with optional recipient and minimum-amount checks

## Facts

- Endpoint: GET https://agent402.tools/api/x402-verify?utm_source=zero.xyz
- Price: $0.004/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agent402-tools-usdc-payment-verification-de99dcda
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_UzPeWdnEnkR27PueDmK4c

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability agent402-tools-usdc-payment-verification-de99dcda
```

Example prompt: Can you confirm that transaction 0x4f3a…b9c2 on Base actually settled and that it sent at least 0.005 USDC to 0xAbCd…1234?

## When to prefer this

Use this endpoint when you need read-only, cryptographic proof that a specific USDC transaction settled on an EVM-compatible chain before delivering a product or service. Prefer it over manually querying a block explorer when you also need to assert that a particular recipient received at least a minimum amount in the same call.

## Known failure modes

- Transaction hash not found on the specified network — returns failure or not-found status
- Transaction exists but is still pending — may return unconfirmed or not-settled status
- Network parameter is invalid or unsupported — returns error
- Recipient address check fails because the address did not receive the minimum amount — returns settled=true but condition=false
- Malformed transaction hash — returns validation error
- Network RPC unavailable — may return a timeout or upstream error

## How this service works

Confirm a USDC payment actually settled: given a tx hash (and network), returns whether it succeeded and the USDC transfers it contains (from, to, amount). Optionally check it paid a specific address at least a minimum amount. Read-only proof of payment.

## Output

Returns whether the transaction succeeded, along with a list of USDC transfers contained in it — each showing the from address, to address, and USDC amount transferred. If a recipient address and minimum amount were specified, also returns whether those conditions were satisfied.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "hash"
     ],
     "properties": {
      "to": {
       "type": "string",
       "description": "optional: expected recipient address to check"
      },
      "min": {
       "type": "number",
       "description": "optional: minimum USDC expected to that recipient"
      },
      "hash": {
       "type": "string",
       "description": "0x transaction hash"
      },
      "network": {
       "type": "string",
       "description": "chain: base | polygon | arbitrum | optimism | ethereum | monad | celo | avalanche | sei | robinhood (default base)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "hash": {
       "type": "string"
      },
      "status": {
       "type": "string"
      },
      "matched": {
       "type": "boolean"
      },
      "network": {
       "type": "string"
      },
      "settled": {
       "type": "boolean"
      },
      "transfers": {
       "type": "array",
       "items": {
        "type": "object",
        "properties": {
         "to": {
          "type": "string"
         },
         "from": {
          "type": "string"
         },
         "usdc": {
          "type": "string"
         }
        }
       }
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "hash": "0x09f85fcf1844d85277b8cce528efc8d25c6df632b1fed1c8337f078901a69562",
  "status": "success",
  "matched": true,
  "network": "base",
  "settled": true,
  "transfers": [
   {
    "to": "0x…",
    "from": "0x…",
    "usdc": "0.01"
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agent402-tools-usdc-payment-verification-de99dcda/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agent402.tools](https://www.zero.xyz/host/agent402.tools/llms.txt)