# Blockchain Transaction Status Lookup

> Blockchain Transaction Status Lookup is a paid API for AI agents from freetier-agent-api.pages.dev, paid per call via x402, $0.0015/call, status unknown (last checked 2026-10-30).

Looks up the status, details, and finality of one or more on-chain transactions by hash across multiple EVM chains

## Facts

- Endpoint: GET https://freetier-agent-api.pages.dev/api/tx-status?utm_source=zero.xyz
- Price: $0.0015/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/blockchain-transaction-status-lookup-e16e0753
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_WuJL8jb6TYdS4IfOjtOJe

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 blockchain-transaction-status-lookup-e16e0753
```

Example prompt: Can you check whether transaction 0xad06b77208318128017ce69952685e3f242281202d7cc9d50847619a706d2d7f went through on Base — I want to know its status, how many confirmations it has, and whether it's finalized?

## When to prefer this

Choose this endpoint when you need to verify the on-chain status of EVM transactions by hash — especially across multiple chains like Ethereum, Base, Arbitrum, Optimism, and Polygon — without setting up API keys or accounts. Ideal for AI agents that need pay-per-call on-chain verification using USDC via x402. Supports batch lookups of up to 10 hashes in one call.

## Known failure modes

- Invalid or malformed transaction hash returns an error or null entry
- Transaction not found on any searched chain returns empty results
- Unsupported chain enum value causes a validation error
- Submitting more than 10 hashes in a comma-separated list may be rejected
- Network or upstream RPC errors may cause partial or failed responses
- Payment failure via x402 protocol blocks the request entirely

## How this service works

Invoice-to-JSON, on-chain tools (transaction explainer + payment check, wallet profile, contract ABI, ERC-20 token risk), company contacts and web-to-RAG for AI agents. Pay per call with x402 (USDC on Base). No signup, no API key.

## Output

Returns an array of transaction objects each containing status (success/fail), block number, from/to addresses, gas used, effective gas price, fee in native coin, number of confirmations, finality flag, and chain details. Also includes a summary with success count and current block head numbers per chain.

## 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": "tx hash (0x + 64 hex), or comma list of up to 10"
      },
      "chain": {
       "enum": [
        "auto",
        "ethereum",
        "base",
        "arbitrum",
        "optimism",
        "polygon"
       ],
       "type": "string",
       "description": "auto (default) searches all 5 chains"
      }
     }
    }
   }
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "at": {
       "type": [
        "string",
        "null"
       ]
      },
      "txs": {
       "type": "array",
       "items": {
        "type": [
         "object",
         "null"
        ]
       }
      },
      "count": {
       "type": [
        "number",
        "null"
       ]
      },
      "heads": {
       "type": "object",
       "properties": {
        "base": {
         "type": [
          "number",
          "null"
         ]
        },
        "polygon": {
         "type": [
          "number",
          "null"
         ]
        },
        "arbitrum": {
         "type": [
          "number",
          "null"
         ]
        },
        "ethereum": {
         "type": [
          "number",
          "null"
         ]
        },
        "optimism": {
         "type": [
          "number",
          "null"
         ]
        }
       }
      },
      "method": {
       "type": [
        "string",
        "null"
       ]
      },
      "sources": {
       "type": "array",
       "items": {
        "type": [
         "object",
         "null"
        ]
       }
      },
      "summary": {
       "type": "object",
       "properties": {
        "success": {
         "type": [
          "number",
          "null"
         ]
        }
       }
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "txs": [
   {
    "to": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
    "from": "0xca5e87f82b3fa093800e6ad67d621a427d79c70d",
    "hash": "0xad06b77208318128017ce69952685e3f242281202d7cc9d50847619a706d2d7f",
    "logs": 2,
    "block": 53070553,
    "chain": "base",
    "status": "success",
    "chainId": 8453,
    "gas_used": 86486,
    "finalized": true,
    "fee_native": "0.000000865878344687",
    "native_coin": "ETH",
    "confirmations": 13910,
    "effective_gas_price_gwei": 0.01
   }
  ],
  "count": 1,
  "summary": {
   "success": 1
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/blockchain-transaction-status-lookup-e16e0753/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from freetier-agent-api.pages.dev](https://www.zero.xyz/host/freetier-agent-api.pages.dev/llms.txt)