# TraceFast Ethereum Transaction by Hash

> TraceFast Ethereum Transaction by Hash is a paid API for AI agents from mpp.tracefast.xyz, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-12).

Fetches full details of a single Ethereum transaction by its hash, including sender, recipient, value, gas, fees, receipt outcome, and block position.

## Facts

- Endpoint: GET https://mpp.tracefast.xyz/api/v1/chains/1/transactions/:hash?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/tracefast-ethereum-transaction-by-hash-ab283299
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_x5dKf_fnJdCdp7-AOOWHb

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 tracefast-ethereum-transaction-by-hash-ab283299
```

Example prompt: Can you pull up the full details for Ethereum transaction 0x4e3a3754410177e6937ef1f84bba68ea139e8d1e58cf7e58e18ec4f2e396f9d6 — I want to see the sender, recipient, value, gas used, and whether it succeeded?

## When to prefer this

Use this endpoint when you need comprehensive details about a single known Ethereum transaction — especially gas, fees, outcome, and block position — in one call. Prefer it over block-level or address-level endpoints when you already have the transaction hash and need the full receipt-plus-metadata picture. It covers EIP-1559 and legacy fee fields, making it suitable for gas cost audits, trade confirmation checks, and on-chain forensics.

## Known failure modes

- Transaction hash not found or not yet indexed — returns 404 or empty result
- Malformed hash (wrong length, non-hex characters) — returns 400 validation error
- Transaction is pending and not yet mined — may return not found
- Network or provider outage — returns 5xx error
- Payment not included or insufficient — returns 402 Payment Required

## How this service works

TraceFast live Ethereum data: one transaction by hash — sender, recipient, value, nonce, type, gas limit and gas used, the fee fields of its type and the price actually paid per gas, the receipt's outcome and log count, and its position (block and index). Path hash: Transaction hash, `0x`-prefixed, 64 hex characters, any case. Docs: https://docs.tracefast.xyz/api/transaction.md

## Output

Returns a structured object containing the transaction's sender and recipient addresses, ETH value, nonce, type, gas limit, gas used, type-specific fee fields (e.g. maxFeePerGas, maxPriorityFeePerGas for EIP-1559), effective gas price paid, receipt status (success/failure), number of logs emitted, block number, and transaction index within that block.

## Request schema (JSON Schema)

```json
{
 "properties": {
  "input": {
   "required": [
    "method"
   ],
   "properties": {
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "pathParams": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/tracefast-ethereum-transaction-by-hash-ab283299/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mpp.tracefast.xyz](https://www.zero.xyz/host/mpp.tracefast.xyz/llms.txt)