# Base Wallet Approval Exposure API

> Base Wallet Approval Exposure API is a paid API for AI agents from xx402.icu, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Returns approval exposure risk for a wallet's ERC20 token allowances on Base, identifying risky spenders within a recent block window

## Facts

- Endpoint: GET https://xx402.icu/x402/api/base-wallet-approval-exposure
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/base-wallet-approval-exposure-api-29ac5a75
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_u_c0QI-CUe6ebhZ_n5-G7

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-approval-exposure-api-29ac5a75
```

Example prompt: Check the approval exposure risk for wallet 0xfBDB0Ad415e95c4843FD872FAc967459572910f1 on Base USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) — look back 5000 blocks and show me up to 10 spenders flagged as risky or needing manual review.

## When to prefer this

Use this endpoint when you need to audit a specific wallet's ERC20 token approval exposure on the Base network, particularly to identify risky or unlimited allowances granted to potentially malicious spender contracts. Prefer this over generic blockchain explorers when you need pre-scored risk levels and manual review flags rather than raw on-chain data.

## Known failure modes

- Invalid wallet address format returns 400 error
- Invalid token address format returns 400 error
- window_blocks outside 100-5000 range returns validation error
- limit outside 1-10 range returns validation error
- Payment not provided or insufficient USDC returns 402 Payment Required
- Wallet with no approvals in the block window returns empty spender list
- Token not found or unsupported on Base returns empty or error response

## How this service works

Paid x402 buyer market scout, x402 paid resource preflight, x402 seller visibility audit, Base actionable risk feed, liquidity exit risk alerts, pool launch risk feed, stable asset risk feed, contract control event feed, protocol outflow risk feed, yield pool allocation risk feed, protocol fee quality feed, token watchlist decision packet, wallet watchlist decision packet, approval risk feed, ranked DeFi review queues with incident history, onchain risk decision packet, promoted token campaign decision packet, large transfer decision packet, token candidate screening decision radar, DEX pair anomaly decision radar, wallet safety decision packet, counterparty flow, allowance, approval exposure, DEX pair routing risk, token trade safety, token liquidity, token flow, holder concentration, contract controls, batch token screening decision packets, token diligence, and BTC15 prediction-market microstructure, execution-friction, calibration-slice, recent market tape, resolved feature sample, and threshold-pressure packets for agents and risk tools.

## Output

Returns a JSON object with a summary of approval exposure, a list of spenders with risk details, risk level counts (e.g. high/medium/low), active allowance spenders, spenders flagged for manual review, and data sources used for the analysis.

## Response schema (JSON Schema)

```json
{
 "keys": [
  "summary",
  "approval_exposure_decision",
  "priority_queue",
  "best_next_products",
  "risk_breakdown",
  "review_queue",
  "avoid_queue",
  "spenders",
  "risk_level_counts",
  "active_allowance_spenders",
  "manual_review_spenders",
  "revocation_priority_queue",
  "revoke_now_spenders",
  "bucket_counts",
  "price_hint",
  "source_status",
  "sources"
 ],
 "type": "json"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/base-wallet-approval-exposure-api-29ac5a75/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from xx402.icu](https://www.zero.xyz/host/xx402.icu/llms.txt)