# LensCrypt Token Approval Checker

> LensCrypt Token Approval Checker is a paid API for AI agents from lemscrypt.vercel.app, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-15).

Retrieves token approval data for a given wallet address on a specified blockchain, helping identify potentially risky or unlimited allowances

## Facts

- Endpoint: GET https://lemscrypt.vercel.app/api/approvals/%7Bchain%7D/%7Baddress%7D
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/lenscrypt-token-approval-checker-6c70e4d8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qtCXEglRbUl8HEQRw6uTQ

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 lenscrypt-token-approval-checker-6c70e4d8
```

Example prompt: Can you check all the token approvals for my wallet 0xAbC123...def456 on Ethereum and flag any unlimited or suspicious allowances I should revoke?

## When to prefer this

Choose this endpoint when you need to audit on-chain token approvals for a specific wallet address across a given EVM-compatible chain. It is particularly useful for security reviews, pre-transaction risk checks, and identifying unlimited allowances that could be exploited. Prefer this over generic block explorer lookups when you need structured, machine-readable approval data directly consumable by an agent.

## Known failure modes

- Invalid or malformed wallet address returns an error
- Unsupported chain identifier returns a bad request or empty result
- Wallet with no approvals returns an empty list
- Network timeout or upstream RPC failure returns a 5xx error
- Payment failure via x402 protocol results in 402 Payment Required response

## How this service works

81 paid REST endpoints covering wallet analytics, DeFi yields, token safety, smart money tracking, whale alerts, sniper detection, GMX perps, Solana tools, protocol stats, gas tracking, DEX quotes, NFT analytics, social signals, and 8 AI-powered endpoints (MiMo V2.5). Pay USDC via x402 protocol on Base.

## Output

Returns a list of token approval records for the specified wallet on the given chain, including spender contract addresses, approved token contracts, and allowance amounts — enabling identification of unlimited, stale, or suspicious approvals.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "status": "ok"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/lenscrypt-token-approval-checker-6c70e4d8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from lemscrypt.vercel.app](https://www.zero.xyz/host/lemscrypt.vercel.app/llms.txt)