# Explorer Gateway API – Ethereum Transaction Lookup

> Explorer Gateway API – Ethereum Transaction Lookup is a paid API for AI agents from api.blockchain.info, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-30).

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

## Facts

- Endpoint: POST https://api.blockchain.info/explorer-gateway-kt/x402/eth/transaction?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/explorer-gateway-api-ethereum-transaction-lookup-f38b7975
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_aM1-AIkxdS8ZsdHqtkCme

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-f38b7975 -d '<json body>'
```

Example prompt: Can you pull up the details for Ethereum transaction 0x4e3a...d91f from Blockchain.com's explorer, and include any ERC-20 token transfers found in it?

## When to prefer this

Choose this endpoint when you need authoritative, on-chain Ethereum transaction data from Blockchain.com's explorer infrastructure, especially when you also need ERC-20 token transfer details within a single call. Prefer this over generic RPC nodes when you want structured, human-readable transaction metadata without running your own node.

## Known failure modes

- Invalid or malformed txId returns an error response
- Transaction not found on the specified network returns 404 or empty result
- Unsupported network value causes a validation error
- Missing required txId field causes a 400 bad request
- Payment not fulfilled (x402 protocol) results in 402 Payment Required

## 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, block confirmation status, and optionally a list of ERC-20 token transfer events (token address, from, to, and amount) found within that 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-f38b7975/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.blockchain.info](https://www.zero.xyz/host/api.blockchain.info/llms.txt)