# Wallet Nonce Lookup

> Wallet Nonce Lookup is a paid API for AI agents from apexfaucet.xyz, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-27).

Returns the current transaction nonce and pending transaction count for an EVM wallet address on Ethereum, Base, Arc, or BNB Chain.

## Facts

- Endpoint: GET https://apexfaucet.xyz/api/x402/evm-nonce?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-27
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/wallet-nonce-lookup-72b5f7c1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ZuSMvyvT5FHJC1BGZwXp7

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 wallet-nonce-lookup-72b5f7c1
```

Example prompt: What's the current nonce for wallet 0x024b82335C29Fa5606a8ea5c1D24FC9eAD50700C on the Arc chain?

## When to prefer this

Use this endpoint when you need real-time nonce data for an EVM wallet across Ethereum, Base, Arc, or BNB Chain without setting up your own RPC node. It is especially useful when you need to construct or sequence transactions correctly, debug stuck transactions, or monitor wallet activity programmatically at very low cost ($0.001 per call). Prefer it over generic blockchain explorers when you need structured JSON output with nonce and pending transaction count in a single lightweight call.

## Known failure modes

- Invalid wallet address format (must match 0x + 40 hex chars) — returns error
- Unsupported chain value — only ethereum, base, arc, bnb are accepted
- Network timeout or chain RPC unavailability — service may return error or delayed response
- Missing required address parameter — request rejected
- Payment failure via x402 protocol — call not executed

## How this service works

Free APEX on X1, and free USDC plus APEX on Arc, three times a day. No gas, no sign-up. Plus a swap, a screener, APEX City and token checks.

## Output

Returns a JSON object with ok status, the wallet address, current nonce, next nonce, number of pending transactions, current block number, block timestamp, and the chain queried. Cost is $0.001 USDC per call paid via x402.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "queryParams"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "address"
     ],
     "properties": {
      "chain": {
       "enum": [
        "ethereum",
        "base",
        "arc",
        "bnb"
       ],
       "type": "string",
       "description": "Chain to read: ethereum, base, arc or bnb. Default ethereum."
      },
      "address": {
       "type": "string",
       "pattern": "^0x[0-9a-fA-F]{40}$",
       "description": "Wallet address."
      }
     }
    }
   }
  },
  "output": {
   "type": "object"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "schema": {
  "type": "object",
  "properties": {
   "ok": {
    "type": "boolean"
   },
   "data": {
    "type": "object"
   },
   "paid": {
    "type": "number"
   }
  }
 },
 "example": {
  "ok": true,
  "data": {
   "ok": true,
   "block": 25781215,
   "chain": "arc",
   "nonce": 1107,
   "address": "0x024b82335C29Fa5606a8ea5c1D24FC9eAD50700C",
   "blockTime": "2026-10-13T16:38:43.000Z",
   "nextNonce": 1107,
   "pendingTransactions": 0
  },
  "paid": 0.001
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/wallet-nonce-lookup-72b5f7c1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from apexfaucet.xyz](https://www.zero.xyz/host/apexfaucet.xyz/llms.txt)