# Leo Shi Market Balance Checker

> Leo Shi Market Balance Checker is a paid API for AI agents from leoshi-blog.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-11).

Returns the token balance for a given wallet address on a specified blockchain network

## Facts

- Endpoint: POST https://leoshi-blog.vercel.app/api/market/balance?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/leo-shi-market-balance-checker-575d4d35
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_1UI3kD2F0oh8V4yiIr_e5

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 leo-shi-market-balance-checker-575d4d35 -d '<json body>'
```

Example prompt: Can you check how much ETH is held by the wallet address 0x55525a3cE0B9cA623f4d145DEbb172029FafEA2b?

## When to prefer this

Use this endpoint when you need a quick, pay-per-call balance lookup for a specific token and wallet address without needing to set up a full blockchain node or subscription-based indexing service. Particularly suited for lightweight agents that need occasional on-chain balance checks rather than continuous monitoring.

## Known failure modes

- Invalid or malformed wallet address returns an error
- Unsupported token symbol returns an error or empty result
- Network or RPC connectivity issues may cause timeouts
- Rate limiting may occur under high request volume

## How this service works

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## Output

Returns a JSON object containing the queried token symbol, the wallet address, and the current token balance as a decimal string (e.g. {"token":"eth","address":"0x...","balance":"1.2345"}).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "token": {
   "enum": [
    "eth",
    "usdc"
   ],
   "type": "string",
   "description": "Token to check; default eth"
  },
  "address": {
   "type": "string",
   "description": "EVM address to check, e.g. 0x55525a3cE0B9cA623f4d145DEbb172029FafEA2b"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "token": "eth",
  "address": "0x55525a3cE0B9cA623f4d145DEbb172029FafEA2b",
  "balance": "1.2345"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/leo-shi-market-balance-checker-575d4d35/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from leoshi-blog.vercel.app](https://www.zero.xyz/host/leoshi-blog.vercel.app/llms.txt)