# Base Wallet Activity & Due-Diligence API

> Base Wallet Activity & Due-Diligence API is a paid API for AI agents from x402-wallet-profile-api-production.up.railway.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-15).

Returns on-chain activity metrics, risk flags, and a heuristic verdict for any Base network wallet address

## Facts

- Endpoint: GET https://x402-wallet-profile-api-production.up.railway.app/wallet/0x0000000000000000000000000000000000000001?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/base-wallet-activity-due-diligence-api-b89898d0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_YtYF7M1ajoXfHFm-Yx8nc

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 base-wallet-activity-due-diligence-api-b89898d0
```

Example prompt: Can you pull the due-diligence profile for Base wallet 0xAbC123...def — I want to know its transaction count, token transfers, ETH balance, how old it is, and whether there are any risk flags before I send funds to it.

## When to prefer this

Choose this endpoint when you need quick, structured due-diligence data specifically on Base network wallet addresses — including activity history, risk heuristics, and contract detection — in a single paid API call. Prefer it over generic block explorers when you need a machine-readable risk verdict and structured fields rather than raw transaction lists, and when you need sub-cent-cost programmatic screening at scale via x402 micropayments.

## Known failure modes

- Invalid or malformed wallet address returns an error response
- Address not found on Base network may return null fields and empty verdict
- Network timeouts from RPC or Blockscout data sources may cause partial data
- Rate limiting or payment failure (x402) prevents the call from completing
- Very new wallets may return null for firstSeen/lastSeen and ageDays

## How this service works

Base wallet activity API for due diligence and risk triage. Get transaction and token-transfer counts, activity dates, native balance, and heuristic risk indicators. From $0.005 USDC per call via x402.

## Output

A JSON object containing: the wallet address, chain identifier, a verdict label (e.g. 'empty', 'active', 'suspicious'), first and last seen timestamps, wallet age in days, total transaction count, outgoing transaction count, token transfer count, native ETH balance, a numeric activity score (0-100), a boolean indicating whether the address is a smart contract, an array of risk flag strings (e.g. 'no_activity', 'low_balance'), the data sources used, and a generatedAt timestamp.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "chain": "base",
  "label": null,
  "address": "0x0000000000000000000000000000000000000001",
  "ageDays": null,
  "verdict": "empty",
  "lastSeen": null,
  "firstSeen": null,
  "riskFlags": [
   "no_activity",
   "low_balance"
  ],
  "balanceEth": "0.0",
  "isContract": false,
  "dataSources": [
   "base_rpc",
   "blockscout"
  ],
  "generatedAt": "2026-01-01T00:00:00.000Z",
  "totalTxCount": 0,
  "activityScore": 0,
  "tokenTransfers": 0,
  "outgoingTxCount": 0
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/base-wallet-activity-due-diligence-api-b89898d0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-wallet-profile-api-production.up.railway.app](https://www.zero.xyz/host/x402-wallet-profile-api-production.up.railway.app/llms.txt)