# Multichain RPC Transaction Receipt Lookup

> Multichain RPC Transaction Receipt 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 2026-09-15).

Fetches the on-chain transaction receipt for a given transaction hash on EVM-compatible chains (Base, Polygon, Arbitrum, Optimism, Ethereum)

## Facts

- Endpoint: GET https://multichain-rpc.clankerceo.workers.dev/transaction-receipt
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/multichain-rpc-transaction-receipt-lookup-69943f6b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Qw4MLjx7uehL0QOa9wt0F

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-transaction-receipt-lookup-69943f6b
```

Example prompt: Can you check whether transaction 0xabc123... on Base went through successfully, and tell me how much gas it used?

## When to prefer this

Choose this endpoint when you need a fast, pay-per-call EVM transaction receipt lookup across Base, Polygon, Arbitrum, Optimism, or Ethereum without managing your own RPC infrastructure. It is ideal for agents that need occasional or bursty on-chain verification without subscription overhead, and when USDC micropayment billing via x402 is acceptable.

## Known failure modes

- Transaction hash not found on specified chain — returns found: false
- Invalid or malformed transaction hash — may return error or found: false
- Chain parameter missing or unsupported — request fails or returns error
- Network or RPC upstream timeout — may return HTTP 5xx or empty response
- Payment not completed (x402) — returns 402 Payment Required before lookup is performed

## How this service works

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

## Output

A JSON object containing the transaction hash, chain name, a boolean 'found' flag indicating whether the transaction exists, a status field ('success' or otherwise), and the gas used in units — giving a complete summary of the on-chain transaction receipt.

## 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-transaction-receipt-lookup-69943f6b/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)