# QuickBuild Base Transaction Lookup

> QuickBuild Base Transaction Lookup is a paid API for AI agents from quickbuild.quynguyenbac.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-21).

Looks up detailed information about a Base chain transaction by hash, returning status, gas, value, ERC-20 transfers, and fee data.

## Facts

- Endpoint: GET https://quickbuild.quynguyenbac.workers.dev/api/base/tx?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/quickbuild-base-transaction-lookup-6fcc70b2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_rBjpUu-BDsxzdl1JSW-T_

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 quickbuild-base-transaction-lookup-6fcc70b2
```

Example prompt: Can you look up Base transaction 0x20215b4a54f0a39995f3afbd748d7b52c3a1922685ddf08e5f694ea1e89b52bf and tell me whether it succeeded, how much gas was used, and if there were any ERC-20 transfers?

## When to prefer this

Choose this endpoint when you need to inspect a specific Base (chain ID 8453) transaction by hash, particularly when you need decoded ERC-20 transfer data, USD fee estimates, and confirmation counts in a single call. Prefer this over a generic Ethereum block explorer when working specifically with the Base L2 network and needing structured JSON output suitable for agent consumption.

## Known failure modes

- Invalid or malformed transaction hash returns an error
- Transaction hash not found on Base chain returns not-found error
- Network or RPC node unavailability causes timeout
- Payment of 0.002 USDC not provided results in 402 response
- Pending transactions may have incomplete block/confirmation data

## How this service works

Landing pages ($15), Google Sheets/Apps Script automation ($10), scrapers, scripts & Telegram bots (from $15), broken-link + sitemap audit reports ($10). See a working demo first, pay after.

## Output

Returns a JSON object containing: transaction hash, status (success/failed/pending), sender and recipient addresses, ETH value transferred, block number and timestamp, number of confirmations, gas used, method ID, transaction fee in both ETH and USD, chain ID, and an array of ERC-20 token transfers (each with from/to/token address/amount/symbol).

## 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": [],
     "properties": {
      "hash": {
       "type": "string",
       "description": "Transaction hash (0x + 64 hex). Optional: defaults to 0x20215b4a54f0a39995f3afbd748d7b52c3a1922685ddf08e5f694ea1e89b52bf."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "to": {
       "type": [
        "string",
        "null"
       ]
      },
      "fee": {
       "type": "object",
       "properties": {
        "usd": {
         "type": [
          "number",
          "null"
         ]
        },
        "totalEth": {
         "type": "string"
        }
       }
      },
      "from": {
       "type": "string"
      },
      "hash": {
       "type": "string"
      },
      "status": {
       "enum": [
        "success",
        "failed",
        "pending"
       ],
       "type": "string"
      },
      "gasUsed": {
       "type": "integer"
      },
      "methodId": {
       "type": [
        "string",
        "null"
       ]
      },
      "valueEth": {
       "type": "string"
      },
      "blockNumber": {
       "type": [
        "integer",
        "null"
       ]
      },
      "confirmations": {
       "type": "integer"
      },
      "blockTimestamp": {
       "type": [
        "string",
        "null"
       ]
      },
      "erc20Transfers": {
       "type": "array",
       "items": {
        "type": "object",
        "properties": {
         "to": {
          "type": "string"
         },
         "from": {
          "type": "string"
         },
         "token": {
          "type": "string"
         },
         "amount": {
          "type": [
           "string",
           "null"
          ]
         },
         "symbol": {
          "type": [
           "string",
           "null"
          ]
         }
        }
       }
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "to": "0xcA11bde05977b3631167028862bE2a173976CA11",
  "fee": {
   "usd": 0.001894,
   "totalEth": "0.000000777072788913"
  },
  "from": "0xB2Bd29925CBbCEA7628279c91945Ca5B98bf371B",
  "hash": "0x20215b4a54f0a39995f3afbd748d7b52c3a1922685ddf08e5f694ea1e89b52bf",
  "status": "success",
  "chainId": 8453,
  "gasUsed": 109412,
  "methodId": "0x82ad56cb",
  "valueEth": "0",
  "blockNumber": 52864498,
  "confirmations": 3716,
  "blockTimestamp": "2026-10-20T17:45:43.000Z",
  "erc20Transfers": [
   {
    "to": "0x751a4c3841bE287544C371B4EE09Bd3366AeA7cf",
    "from": "0xA1d1C0cf717402ff3651aA4873CcF96410B01978",
    "token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "0.05",
    "symbol": "USDC"
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/quickbuild-base-transaction-lookup-6fcc70b2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from quickbuild.quynguyenbac.workers.dev](https://www.zero.xyz/host/quickbuild.quynguyenbac.workers.dev/llms.txt)