# Wallet Age & Activity Profile (Base Address)

> Wallet Age & Activity Profile (Base Address) is a paid API for AI agents from api.x402node.dev, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).

Analyzes a Base L2 wallet address to return age, transaction count, ETH balance, last activity date, monthly heatmap, and a freshness/sybil verdict (fresh/established/dormant/inactive).

## Facts

- Endpoint: GET https://api.x402node.dev/wallet/age-activity
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/api-x402node-dev-bb292b5b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_GRD-s2XvxOpQDuy1Jp2PQ

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 api-x402node-dev-bb292b5b
```

Example prompt: Before I send payment to 0x3fC9...a12B on Base, can you check if that wallet is established or just a fresh throwaway — I want to see its age, transaction count, last activity, and whether it gets flagged as a sybil or dormant wallet?

## When to prefer this

Use this endpoint when you need on-chain due diligence on a Base L2 wallet before transacting, airdropping, or granting access — specifically when you want a structured verdict (fresh/established/dormant/inactive) and sybil/freshness flags rather than raw blockchain data. Prefer this over raw ETH balance endpoints when wallet history context and behavioral classification matter.

## Known failure modes

- Invalid or malformed Base address returns an error
- Address with zero on-chain history may return minimal data or a 'fresh/inactive' verdict
- Network or RPC timeout causes request failure
- Payment not included or insufficient causes 402 rejection

## How this service works

Wallet age and activity profile: POST a Base address, returns wallet age (since first inbound), total transaction count, ETH balance, last activity date, days since last tx, and a recent monthly activity heatmap. Verdict: fresh, established, dormant, inactive, with sybil/freshness flags. For AI agent due diligence to distinguish a brand-new throwaway wallet from an established active one before transacting. Not financial advice. Accepts payment on Base or Solana — either network works.

## Output

Returns a JSON object containing the wallet's age (days since first inbound transaction), total transaction count, current ETH balance, last activity date, days since last transaction, a monthly activity heatmap, and a categorical verdict of fresh/established/dormant/inactive along with sybil and freshness flags.

## Example request

```json
{
 "address": "0x1234567890123456789012345678901234567890"
}
```

## 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"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "address"
     ],
     "properties": {
      "address": {
       "type": "string",
       "description": "EVM/chain address (required)"
      }
     }
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/api-x402node-dev-bb292b5b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.x402node.dev](https://www.zero.xyz/host/api.x402node.dev/llms.txt)