# agent402.tools Transaction Status Checker

> agent402.tools Transaction Status Checker is a paid API for AI agents from agent402.tools, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).

Returns the confirmation status (success/failed/pending/not found) of a blockchain transaction by hash on Base, Polygon, Arbitrum, Optimism, or Ethereum, including block, from/to addresses, and gas used.

## Facts

- Endpoint: GET https://agent402.tools/api/tx-status
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agent402-tools-transaction-status-checker-d7e8f6fd
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_95jupWjpP25bLy7hMk20m

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 agent402-tools-transaction-status-checker-d7e8f6fd
```

Example prompt: Can you check whether transaction 0x4a3b2c1d... confirmed on Base — did it succeed or fail, and how much gas was used?

## When to prefer this

Use this endpoint when you need a quick, read-only status check for a specific EVM transaction by hash across Base, Polygon, Arbitrum, Optimism, or Ethereum — especially when you need human-readable confirmation (success/failed/pending) plus basic on-chain metadata like gas used and counterparties, without needing a full blockchain explorer or node setup.

## Known failure modes

- Transaction hash not found on the specified network — returns 'not found' status
- Hash provided on wrong network (e.g. Ethereum hash queried against Base) — returns 'not found'
- Malformed or invalid transaction hash format — likely returns an error
- Network temporarily unavailable or RPC congestion — may return error or timeout
- Transaction still in mempool — returns 'pending' with limited details

## How this service works

Check the confirmation status of a transaction by hash on Base/Polygon/Arbitrum/Optimism/Ethereum/Monad/Celo/Avalanche/Sei/Robinhood Chain: success / failed / pending / not found, with block, from, to, gas used. Read-only. ?hash=0x…&network=base

## Output

Returns a status field (success, failed, pending, or not found), along with block number, from address, to address, and gas used for the given transaction hash on the specified EVM-compatible 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",
       "description": "0x transaction hash"
      },
      "network": {
       "type": "string",
       "description": "chain: base | polygon | arbitrum | optimism | ethereum | monad | celo | avalanche | sei | robinhood (default base)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "to": {
       "type": "string"
      },
      "from": {
       "type": "string"
      },
      "hash": {
       "type": "string"
      },
      "status": {
       "type": "string"
      },
      "gasUsed": {
       "type": "integer"
      },
      "network": {
       "type": "string"
      },
      "blockNumber": {
       "type": "integer"
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "to": "0x…",
  "from": "0x…",
  "hash": "0x…",
  "status": "success",
  "gasUsed": 51000,
  "network": "base",
  "blockNumber": 18000000
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agent402-tools-transaction-status-checker-d7e8f6fd/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agent402.tools](https://www.zero.xyz/host/agent402.tools/llms.txt)