# x402helper.xyz Transaction Lookup

> x402helper.xyz Transaction Lookup is a paid API for AI agents from x402helper.xyz, paid per call via x402, $0.013/call, status unknown (last checked 2026-10-31).

Looks up on-chain transaction details by hash across EVM networks, returning structured result data via x402 micropayment-gated API.

## Facts

- Endpoint: GET https://x402helper.xyz/89e509/tx?utm_source=zero.xyz
- Price: $0.013/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402helper-xyz-transaction-lookup-1a3a4bac
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_CKjb1taAJwHs5NwLupNtb

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 x402helper-xyz-transaction-lookup-1a3a4bac
```

Example prompt: Can you look up transaction 0x3a7f...b2c9 on Base and tell me what happened — did it go through successfully?

## When to prefer this

Use this endpoint when you need to look up a specific on-chain transaction by hash across major EVM networks (Base, Ethereum, Arbitrum, Optimism, Polygon, BNB) and are willing to pay a small USDC micropayment per call. Appropriate for agents that need lightweight, pay-per-query blockchain transaction verification without running their own node infrastructure.

## Known failure modes

- Invalid or malformed transaction hash returns an error
- Transaction hash not found on specified network
- Unsupported network specified
- Payment not completed or x402 micropayment rejected
- Network timeout when querying blockchain node

## How this service works

X402 micropayments server — AI agents pay USDC for OFAC screening, rates, and billing verification.

## Output

Returns a JSON object with a 'success' boolean and a 'result' object containing on-chain transaction details for the specified hash and network.

## 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": {
      "hash": {
       "type": "string",
       "default": null,
       "description": "Transaction hash (0x..., 32 bytes)"
      },
      "network": {
       "enum": [
        "base",
        "ethereum",
        "arbitrum",
        "optimism",
        "polygon",
        "bnb"
       ],
       "type": "string",
       "default": null,
       "description": "EVM network to read from (default base)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "result": {},
  "success": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402helper-xyz-transaction-lookup-1a3a4bac/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402helper.xyz](https://www.zero.xyz/host/x402helper.xyz/llms.txt)