# Keyronne Chain Transaction Lookup

> Keyronne Chain Transaction Lookup is a paid API for AI agents from keyronne.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-11).

Look up an EVM transaction and its receipt by hash on Ethereum, Base, Arbitrum, Optimism, Polygon, or BNB Chain, returning status, addresses, value, block, gas, and more.

## Facts

- Endpoint: POST https://keyronne.com/api/chain-tx?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/keyronne-chain-transaction-lookup-760573c1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ECWNXg8VAe9UnpYdsomVy

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 keyronne-chain-transaction-lookup-760573c1 -d '<json body>'
```

Example prompt: Can you look up this Base transaction for me — 0xb498053e345acd227657ef2e3de7d9fd9b861d673368419c4b18cfaea20365c8 — and tell me whether it succeeded, who sent it, how much ETH was transferred, and how much gas was used?

## When to prefer this

Use this endpoint when you need to verify or inspect a specific EVM transaction by its hash across major chains (Ethereum, Base, Arbitrum, Optimism, Polygon, BNB Chain) without managing your own RPC keys or infrastructure. Prefer over raw JSON-RPC calls when you want a clean, pre-parsed response including receipt data in a single request.

## Known failure modes

- Invalid or malformed transaction hash returns an error
- Transaction hash not found on the specified chain returns not-found error
- Unsupported chain name returns validation error
- Network or RPC node timeout may cause slow or failed responses
- Pending transaction may return partial data without receipt fields

## How this service works

Look up a transaction and its receipt on Ethereum, Base, Arbitrum, Optimism, Polygon, or BNB Chain: status (success/reverted/pending), from/to, value, block, nonce, gas used and price, log count, and any contract created. Public JSON-RPC, no API keys. POST a JSON body like: {"chain":"base","hash":"0xb498053e345acd227657ef2e3de7d9fd9b861d673368419c4b18cfaea20365c8"}

## Output

Returns transaction details including: status (success/reverted/pending), from address, to address, ETH value, block number, nonce, gas used, gas price, log count, and any contract address created by the transaction.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "hash": {
   "type": "string",
   "description": "Transaction hash (0x + 64 hex)."
  },
  "chain": {
   "enum": [
    "ethereum",
    "base",
    "arbitrum",
    "optimism",
    "polygon",
    "bsc"
   ],
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/keyronne-chain-transaction-lookup-760573c1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from keyronne.com](https://www.zero.xyz/host/keyronne.com/llms.txt)