# Ethereum Address Activity Lookup

> Ethereum Address Activity Lookup is a paid API for AI agents from crypto-asistent.com, paid per call via x402, $0.04/call, status unknown (last checked 2026-10-13).

Returns ETH balance and recent large transfers in and out for a given Ethereum address

## Facts

- Endpoint: POST https://crypto-asistent.com/api/x402/data/address?utm_source=zero.xyz
- Price: $0.04/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ethereum-address-activity-lookup-d996eb1a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_OmqR_4BayrStmb6Cs_ZtU

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 ethereum-address-activity-lookup-d996eb1a -d '<json body>'
```

Example prompt: Pull up the ETH balance and recent large transfers in and out of this wallet address 0xBE0eB53F46cd790Cd13851d5EFf43D12404d33E8 — I want to see the on-chain movement behind the Binance story I just read.

## When to prefer this

Use this endpoint when you have a specific Ethereum address and need to quickly understand its current balance and recent large-scale transfer activity — especially useful for investigating wallets named in news stories, monitoring exchange or treasury addresses, or tracking whale activity. Prefer this over the large-transfer firehose endpoint when you want address-specific context rather than a broad market scan.

## Known failure modes

- Invalid or malformed Ethereum address returns an error
- Address with no transaction history may return empty transfer list
- Very new addresses may have insufficient data
- Network congestion or node issues may cause stale or delayed data
- Payment failure via x402 protocol prevents call from executing

## How this service works

Ethereum address activity: ETH balance plus recent large transfers in and out. Point it at an exchange wallet, a treasury or a wallet a headline just named, and get the movement behind the story rather than the story.

## Output

Returns the ETH balance of the queried address along with a list of recent large ETH transfers (both inbound and outbound), giving context on significant capital movements associated with that wallet.

## 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",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "required": [],
     "properties": {}
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    },
    "pathParams": {
     "type": "object"
    }
   },
   "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/ethereum-address-activity-lookup-d996eb1a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from crypto-asistent.com](https://www.zero.xyz/host/crypto-asistent.com/llms.txt)