# PlainText — Wallet Approval Checker

> PlainText — Wallet Approval Checker is a paid API for AI agents from smartcontractexplainer.onrender.com, paid per call via x402, $0.04/call, status unknown (last checked 2026-10-13).

Fetches live token and NFT approvals for an EVM wallet address and returns a plain-language safety verdict (SAFE, CAUTION, or RISK) powered by the GoPlus Security API.

## Facts

- Endpoint: POST https://smartcontractexplainer.onrender.com/api/check-wallet?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/plaintext-wallet-approval-checker-82de2312
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_dRCpzKsEkNAKDXzyTIt-s

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 plaintext-wallet-approval-checker-82de2312 -d '<json body>'
```

Example prompt: Check my Ethereum wallet 0xAbC123...def for any risky token approvals and explain in plain English whether I'm safe or at risk.

## When to prefer this

Choose this endpoint when a user — especially a non-technical one — needs to understand their wallet's live approval exposure in plain language, not raw API data. It is ideal for consumer-facing agents or wallet security audits where readability and a clear risk verdict matter. Prefer it over raw blockchain queries when you need GoPlus Security's threat intelligence combined with a human-friendly explanation in a single call.

## Known failure modes

- Invalid or malformed wallet address returns an error
- Unsupported chain name causes a validation failure
- GoPlus API downtime may cause fetch failures
- Wallet with no approval history returns a SAFE verdict with empty raw array
- Rate limits or payment failures (x402) block the request

## How this service works

Check an EVM wallet's live token/NFT approvals and get a plain-language verdict (SAFE, CAUTION or RISK) with an explanation

## Output

Returns a JSON object with a 'verdict' field (SAFE, CAUTION, or RISK), a plain-English 'explanation' field describing what was found in non-technical language, and optionally a 'raw' array of the underlying approval records from GoPlus Security.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "address"
 ],
 "properties": {
  "kind": {
   "enum": [
    "token",
    "nft"
   ],
   "type": "string",
   "description": "Approval type to check (default: token)"
  },
  "chain": {
   "enum": [
    "ethereum",
    "bsc",
    "polygon",
    "arbitrum",
    "optimism",
    "base",
    "avalanche"
   ],
   "type": "string",
   "description": "Chain to check approvals on (default: ethereum)"
  },
  "address": {
   "type": "string",
   "description": "EVM wallet address to check"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "verdict",
  "explanation"
 ],
 "properties": {
  "raw": {
   "type": "array",
   "items": {
    "type": "object"
   }
  },
  "verdict": {
   "enum": [
    "SAFE",
    "CAUTION",
    "RISK"
   ],
   "type": "string"
  },
  "explanation": {
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/plaintext-wallet-approval-checker-82de2312/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from smartcontractexplainer.onrender.com](https://www.zero.xyz/host/smartcontractexplainer.onrender.com/llms.txt)