# Explorer Gateway API – Ethereum Transaction Lookup

> Explorer Gateway API – Ethereum Transaction Lookup is a paid API for AI agents from api.blockchain.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-02).

Retrieves detailed Ethereum transaction data by transaction ID, optionally including ERC-20 token transfers

## Facts

- Endpoint: POST https://api.blockchain.com/explorer-gateway-kt/x402/eth/transaction?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/explorer-gateway-api-ethereum-transaction-lookup-d0107f25
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_bQsiLALQo2V_cjtB8ev67

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 explorer-gateway-api-ethereum-transaction-lookup-d0107f25 -d '<json body>'
```

Example prompt: Can you look up the Ethereum transaction 0x4e3a3754410177e6937ef1f84bba68ea139e8d1b3e399197f7c43d97fcf5b1a2 on the ETH network and include any ERC-20 token transfers that were part of it?

## When to prefer this

Use this endpoint when you need to retrieve structured Ethereum transaction data programmatically, especially when you also need ERC-20 token transfer details bundled in a single call. Prefer this over generic block explorer scraping when you need machine-readable JSON output. Choose this over Etherscan's API if you want a unified multi-chain gateway (Solana, Bitcoin, Bitcoin Cash, Ethereum) from a single provider with pay-per-use x402 micropayment pricing.

## Known failure modes

- Invalid or malformed transaction ID returns an error or empty response
- Transaction not found on the specified network returns 404 or null result
- Wrong network specified (e.g. passing a Bitcoin txId for ETH network) causes lookup failure
- Rate limiting or payment failure (x402) blocks the request
- Network congestion or node unavailability causes timeout

## How this service works

Blockchain explorer gateway — Solana, Bitcoin, Bitcoin Cash, Ethereum

## Output

Returns a JSON object containing detailed Ethereum transaction data including sender, receiver, value, gas used, block number, status, and — if the transfers flag is set to true — an array of ERC-20 token transfer events that occurred within the transaction.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "txId": {
   "type": "string"
  },
  "network": {
   "type": "string",
   "example": "ETH"
  },
  "transfers": {
   "type": "boolean",
   "default": false,
   "description": "When true, includes the token (ERC-20) transfers found in this transaction"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "format": "application/json"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/explorer-gateway-api-ethereum-transaction-lookup-d0107f25/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.blockchain.com](https://www.zero.xyz/host/api.blockchain.com/llms.txt)