# chain.openverbs.com EVM Transaction Lookup

> chain.openverbs.com EVM Transaction Lookup is a paid API for AI agents from chain.openverbs.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-15).

Fetches live on-chain status and full details of an EVM transaction by its hash, including success/failure, value, gas, and block info

## Facts

- Endpoint: POST https://chain.openverbs.com/v1/tx
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/chain-openverbs-com-evm-transaction-lookup-465cff17
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_QcJPB0LPKr-uCpbPl9mLM

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 chain-openverbs-com-evm-transaction-lookup-465cff17 -d '<json body>'
```

Example prompt: Can you check the status of this Ethereum transaction — 0x4e3a3754410177e6937ef1f84bba68ea139e8d1063f1212b68d2fd6d7f84d2a2 — and tell me whether it succeeded, how much ETH was moved, the gas used, and which block it landed in?

## When to prefer this

Choose this endpoint when you need live, authoritative on-chain transaction data for EVM-compatible chains (Ethereum, Base, Arbitrum, Optimism, Polygon) and need status, value, gas details, and block info in a single call. It has automatic RPC fallback for reliability. Prefer it over block explorers when you need machine-readable structured output rather than a human UI, and over general-purpose Web3 libraries when you want a simple HTTP API with no wallet/node infrastructure.

## Known failure modes

- Unknown or invalid hash returns found:false with no additional data
- Malformed hash (not matching 0x[64 hex chars] pattern) triggers a validation error
- Querying a hash on the wrong chain returns found:false
- Network or RPC provider outages may delay or fail responses, though automatic endpoint fallback is attempted
- Pending transactions may return status:pending with incomplete block/gas data

## How this service works

Live status and details of a transaction by hash: success/failed/pending, from/to, value (wei + ether), nonce, block number, gas used, effective gas price and any created contract address. Returns `found:false` for unknown hashes. Reads live on-chain data with automatic endpoint fallback.

## Output

Returns a JSON object with found:true/false; if found, includes transaction hash, chain, status (success/failed/pending), from address, to address, value in wei and ether, nonce, block number, gas used, effective gas price, and optionally a contractAddress if the transaction created a contract.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "type": "object",
     "properties": {
      "hash": {
       "type": "string",
       "pattern": "^0x[0-9a-fA-F]{64}$",
       "description": "32-byte transaction hash."
      },
      "chain": {
       "enum": [
        "ethereum",
        "base",
        "arbitrum",
        "optimism",
        "polygon"
       ],
       "type": "string",
       "description": "EVM chain to query. One of: ethereum, base, arbitrum, optimism, polygon. Default \"ethereum\"."
      }
     },
     "additionalProperties": false
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/chain-openverbs-com-evm-transaction-lookup-465cff17/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from chain.openverbs.com](https://www.zero.xyz/host/chain.openverbs.com/llms.txt)