# DESK LEAD x402 – Native Balance Lookup

> DESK LEAD x402 – Native Balance Lookup is a paid API for AI agents from desk-x402.desk-x402-gh.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-02).

Returns the native cryptocurrency balance (in Wei) for a given wallet address on BSC or Base networks, paid via x402 micropayment.

## Facts

- Endpoint: GET https://desk-x402.desk-x402-gh.workers.dev/v1/native-balance?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/desk-lead-x402-native-balance-lookup-88dce808
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_kLoohk72RKt5W3G8utJCm

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 desk-lead-x402-native-balance-lookup-88dce808
```

Example prompt: What's the current native token balance in Wei for wallet 0xAbCd1234...5678 on Base?

## When to prefer this

Choose this endpoint when you need a lightweight, per-call micropayment (0.01 USDC) approach to fetching native token balances on Base or BSC without setting up a full RPC subscription. Ideal for agents that need occasional balance checks without committing to a node provider subscription. Prefer over full node queries when you want x402 payment-gated access with minimal setup.

## Known failure modes

- Invalid or malformed wallet address (not matching ^0x[a-fA-F0-9]{40}$) returns an error
- Unsupported network value outside bsc/base/both causes rejection
- Missing required 'address' query parameter results in 400-class error
- Payment not provided or invalid x402 payment header causes 402 Payment Required
- Network congestion or RPC unavailability may cause timeouts or 503 errors

## How this service works

Micropay research APIs (x402 v2 + bazaar). Free catalog at /.well-known/x402.json. Primary v2 accepts: Base eip155:8453 only. Legacy X-PAYMENT-TX still supports bsc|base via acceptsV1. Headers: X-PAYMENT-TX, X-PAYMENT-NETWORK, PAYMENT-SIGNATURE. No financial advice.

## Output

Returns a JSON object with: ok (boolean success flag), nonce (integer), product (string identifier 'native_balance'), and balanceWei (hex-encoded balance in Wei for the queried address and network).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "address"
     ],
     "properties": {
      "address": {
       "type": "string",
       "pattern": "^0x[a-fA-F0-9]{40}$"
      },
      "network": {
       "enum": [
        "bsc",
        "base",
        "both"
       ],
       "type": "string"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "nonce": 0,
  "product": "native_balance",
  "balanceWei": "0x0"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/desk-lead-x402-native-balance-lookup-88dce808/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from desk-x402.desk-x402-gh.workers.dev](https://www.zero.xyz/host/desk-x402.desk-x402-gh.workers.dev/llms.txt)