# Blockchain.info Explorer Gateway — Ethereum Address Token Lookup

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

Returns the list of tokens held by a given Ethereum address on the specified network

## Facts

- Endpoint: POST https://api.blockchain.info/explorer-gateway-kt/x402/eth/address/tokens?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/blockchain-info-explorer-gateway-ethereum-address-token-lookup-1c6675e2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_rsO8XrRosl7NtFYK6DpKb

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-info-explorer-gateway-ethereum-address-token-lookup-1c6675e2 -d '<json body>'
```

Example prompt: What ERC-20 tokens does the Ethereum address 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 hold on the ETH network?

## When to prefer this

Use this endpoint when you need a quick, pay-per-call lookup of Ethereum token holdings for a specific address without managing your own blockchain node or indexer. It is ideal for agent workflows that need real-time token portfolio data for arbitrary Ethereum addresses. Prefer this over full blockchain node RPC calls when you want a simple REST API with no infrastructure overhead, and over free explorers when you need programmatic access at scale.

## Known failure modes

- Invalid or malformed Ethereum address returns an error or empty result
- Unsupported network value causes a bad request or empty token list
- Address with no token holdings returns an empty array
- Rate limiting or payment failure returns a 402 or 429 error
- Network connectivity issues to the blockchain node return a timeout or 5xx error

## How this service works

Paid AI-agent access to Blockchain.com Explorer API

## Output

A JSON response listing the tokens associated with the given Ethereum address on the specified network, typically including token names, symbols, contract addresses, and balances.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "address": {
   "type": "string"
  },
  "network": {
   "type": "string",
   "example": "ETH"
  }
 }
}
```

## Response schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/blockchain-info-explorer-gateway-ethereum-address-token-lookup-1c6675e2/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)