# Base Wallet Activity Score

> Base Wallet Activity Score is a paid API for AI agents from base-intel-api.jakemaxsigal.workers.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).

Returns an activity score (0-100) for a Base wallet address, including smart wallet detection, ETH/USDC balances, and recent USDC flow.

## Facts

- Endpoint: POST https://base-intel-api.jakemaxsigal.workers.dev/wallet/score/:address
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/base-intel-api-jakemaxsigal-workers-dev-6daf56a0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_nGfmEUD7k6DSrznPwDrb2

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-intel-api-jakemaxsigal-workers-dev-6daf56a0 -d '<json body>'
```

Example prompt: Score the Base wallet 0x1234...abcd for me — I want to know its activity score, whether it's a smart wallet, and how much ETH and USDC it holds with recent flow data.

## When to prefer this

Use this endpoint when you need a quick composite reputation or activity signal for a specific Base wallet, especially when you want smart wallet classification plus balance and USDC flow context in a single call. Prefer this over raw RPC queries when you need a normalized 0–100 score rather than raw on-chain data.

## Known failure modes

- Invalid or malformed wallet address returns 400 error
- Address not found on Base returns score of 0 or empty profile
- Payment not included or insufficient USDC triggers 402 payment required
- Rate limiting or node congestion may return 429 or 503
- Non-Base (e.g. Ethereum mainnet) addresses may return inaccurate or empty results

## How this service works

Base wallet score API / wallet reputation / address risk scoring / onchain wallet intelligence / counterparty check. Returns a 0-100 activity score with letter grade, smart-wallet (ERC-4337) detection, ETH and USDC balances, recent USDC flow, and a user profile for any Base address. For AI agents, fraud screening, and KYC/counterparty checks.

## Output

Returns a 0–100 activity score for the given Base wallet address, a smart wallet detection flag, current ETH and USDC balances, a summary of recent USDC inflow/outflow, and a user profile object.

## Example request

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/base-intel-api-jakemaxsigal-workers-dev-6daf56a0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from base-intel-api.jakemaxsigal.workers.dev](https://www.zero.xyz/host/base-intel-api.jakemaxsigal.workers.dev/llms.txt)