# Base USDC Receipt Verifier

> Base USDC Receipt Verifier is a paid API for AI agents from abi-mainnet-sandbox.benjaminbu.workers.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).

Verifies a Base blockchain USDC transaction by looking up its receipt via transaction hash

## Facts

- Endpoint: GET https://abi-mainnet-sandbox.benjaminbu.workers.dev/v1/x402/verify
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/base-usdc-receipt-verifier-b1ca8e35
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_BQgW68Bjj3pefE20PyeDO

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 base-usdc-receipt-verifier-b1ca8e35
```

Example prompt: Can you verify whether this Base USDC transaction actually went through? The tx hash is 0x4a3f2c1d8e9b7a6f5c4d3e2b1a0f9e8d7c6b5a4f3e2d1c0b9a8f7e6d5c4b3a2.

## When to prefer this

Use this endpoint when you need to verify a specific USDC payment on the Base blockchain using a known transaction hash. Ideal for confirming payment receipts in e-commerce, freelance invoicing, x402-based API billing, or any workflow that requires on-chain proof of a USDC transfer on Base mainnet.

## Known failure modes

- Invalid or malformed transaction hash (not 0x + 64 hex chars) returns an error
- Transaction hash not found on Base mainnet returns not-found or unverified result
- Network or RPC issues may cause lookup failures
- Transaction exists but is not a USDC transfer may return negative verification
- Pending/unconfirmed transactions may return unconfirmed status

## How this service works

Base USDC receipt verifier

## Output

Returns a verification result indicating whether the provided Base transaction hash corresponds to a valid, confirmed USDC transaction, along with transaction receipt details such as confirmation status, amounts, sender/receiver addresses, and block information.

## 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": [
      "tx_hash"
     ],
     "properties": {
      "tx_hash": {
       "type": "string",
       "description": "Base transaction hash (0x + 64 hex chars)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/base-usdc-receipt-verifier-b1ca8e35/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from abi-mainnet-sandbox.benjaminbu.workers.dev](https://www.zero.xyz/host/abi-mainnet-sandbox.benjaminbu.workers.dev/llms.txt)