# Blockchain Transaction Lookup by Hash

> Blockchain Transaction Lookup by Hash is a paid API for AI agents from biosfera.46-62-215-147.sslip.io, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-01).

Fetches full transaction details (sender, recipient, value, gas, input data, status) for a given transaction hash on Base, Ethereum, Arbitrum, Optimism, or Polygon.

## Facts

- Endpoint: GET https://biosfera.46-62-215-147.sslip.io/o/tx-by-hash?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/blockchain-transaction-lookup-by-hash-731b0a94
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_AkzKoNkQ9E0K3zbm8zU6Y

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-lookup-by-hash-731b0a94
```

Example prompt: Can you pull up the full details for Ethereum transaction 0x4a1b2c3d4e5f6789abcdef01234567890abcdef01234567890abcdef012345678 — I need to see who sent it, who received it, the value, and whether it's been mined yet.

## When to prefer this

Use this endpoint when you need raw, authoritative transaction-level data from EVM-compatible chains by a known hash — especially when you need sender, recipient, value, gas fields, and input data all in one call. Prefer this over a transaction receipt endpoint when you also need pending/mempool status or the full gas parameters, not just the execution result.

## Known failure modes

- Invalid or malformed transaction hash (must be 0x-prefixed 66-character hex string) returns a validation error
- Transaction hash not found on the specified chain returns a not-found error
- Unsupported chain value (anything outside base/ethereum/arbitrum/optimism/polygon) returns a schema validation error
- Network congestion or RPC node issues may cause timeouts
- Payment failure (insufficient USDC balance for $0.002 per call) blocks the request

## How this service works

Use when you need the content of a transaction on Base, Ethereum, Arbitrum, Optimism or Polygon by its hash: sender, recipient, value, nonce, gas limit, gas price fields, input data size and function selector, and whether it is mined or pending.

## Output

Returns structured transaction fields including from address, to address, ETH/native value, nonce, gas limit, gas price, input data size, function selector (first 4 bytes of calldata), and whether the transaction is mined (confirmed) or pending in the mempool.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "chain",
      "hash"
     ],
     "properties": {
      "hash": {
       "type": "string",
       "pattern": "^0x[0-9a-fA-F]{64}$"
      },
      "chain": {
       "enum": [
        "base",
        "ethereum",
        "arbitrum",
        "optimism",
        "polygon"
       ],
       "type": "string"
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/blockchain-transaction-lookup-by-hash-731b0a94/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from biosfera.46-62-215-147.sslip.io](https://www.zero.xyz/host/biosfera.46-62-215-147.sslip.io/llms.txt)