# Multichain RPC/tx — Transaction Lookup

> Multichain RPC/tx — Transaction Lookup is a paid API for AI agents from multichain-rpc.clankerceo.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).

Retrieves full transaction details and receipt by hash on EVM chains, including status, block, from/to addresses, value, gas used, effective gas price, and decoded ERC-20 transfers.

## Facts

- Endpoint: GET https://multichain-rpc.clankerceo.workers.dev/tx
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/multichain-rpc-tx-transaction-lookup-f6c6c1b6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_7OtVgHl9_eCSC4q29ZwC6

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 multichain-rpc-tx-transaction-lookup-f6c6c1b6
```

Example prompt: Can you look up transaction 0x3f4a1b2c... on Base and tell me if it succeeded, how much gas was used, and whether any ERC-20 tokens were transferred?

## When to prefer this

Use this endpoint when you need on-chain transaction verification or receipt data across Base, Polygon, Arbitrum, Optimism, or Ethereum without running your own node. It is especially useful when you need decoded ERC-20 transfer events rather than raw log data, and when per-call USDC micropayment pricing is acceptable. Prefer over general-purpose RPC providers when you want a structured, pre-parsed response that includes human-readable transfer details.

## Known failure modes

- Transaction hash not found on the specified chain — returns found: false
- Invalid or malformed transaction hash format — likely returns an error response
- Chain parameter not recognized or unsupported — may return an error or empty result
- Network timeout or RPC node unavailability — transient failure
- Transaction still pending — may return incomplete receipt data

## How this service works

Cheap, factual EVM chain lookups priced per call in USDC. Base, Polygon, Arbitrum, Optimism and Ethereum.

## Output

Returns a JSON object with the transaction hash, chain, found flag, status (success/failed/pending), block number, from and to addresses, ETH value, gas used, effective gas price, and an array of decoded ERC-20 transfer events within the transaction.

## 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",
    "queryParams"
   ],
   "properties": {
    "type": {
     "enum": [
      "http"
     ],
     "type": "string"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "hash": {
       "type": "string"
      },
      "chain": {
       "type": "string"
      }
     }
    }
   }
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "enum": [
      "json"
     ],
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "hash": "0x…",
  "chain": "base",
  "found": true,
  "status": "success",
  "gas_used": 21000
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/multichain-rpc-tx-transaction-lookup-f6c6c1b6/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from multichain-rpc.clankerceo.workers.dev](https://www.zero.xyz/host/multichain-rpc.clankerceo.workers.dev/llms.txt)