# Wallet Nonce Lookup - Base & Ethereum

> Wallet Nonce Lookup - Base & Ethereum is a paid API for AI agents from scanpay-edge.alextaghiashvili.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-11-01).

Returns the next transaction nonce (eth_getTransactionCount) for any EVM wallet address on Base or Ethereum mainnet.

## Facts

- Endpoint: GET https://scanpay-edge.alextaghiashvili.workers.dev/api/v1/nonce?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-11-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/wallet-nonce-lookup-base-ethereum-314ea724
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_h7Cdatr0TqJcYcv9nDMXK

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-base-ethereum-314ea724
```

Example prompt: What's the current transaction nonce for wallet 0x1E04f5046500e5369E17AF993Dc60aC29D83efc9 on Base so I can sign my next transaction correctly?

## When to prefer this

Use this endpoint when you need a quick, reliable nonce lookup for an EVM address on Base or Ethereum before constructing or signing a transaction. It is ideal for agents orchestrating on-chain transactions, DeFi bots, or wallet tooling that needs the current eth_getTransactionCount without managing their own RPC connection. Prefer this over a general RPC provider when you want a pay-per-call model with no API key setup.

## Known failure modes

- Invalid or malformed EVM address returns an error or unexpected result
- Unsupported network parameter causes a failure response
- RPC node downtime or congestion may delay or fail the response
- Missing required address parameter results in a 400-level error
- Payment failure (insufficient USDC balance for x402 micropayment) blocks the request

## How this service works

Pay-per-call x402 APIs for AI agents: OpenAI-compatible LLM chat, perp funding and arbitrage spreads, crypto prices, gas, FX, Solana SPL mint audit, token price by contract, x402 delivery-receipt verification, web search, clean page extraction, batch tools and deterministic code-security scanning. USDC on Base or Solana, no signup, no API key, from $0.0001 a call.

## Output

Returns a JSON object containing the EVM address queried, the network (e.g. 'base' or 'ethereum'), the chain ID in CAIP-2 format (e.g. 'eip155:8453'), the current nonce (transaction count), the next_nonce to use for the next transaction, and the price_usd of the call.

## 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"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "address"
     ],
     "properties": {
      "address": {
       "type": "string"
      },
      "network": {
       "enum": [
        "base",
        "ethereum"
       ],
       "type": "string"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "nonce": 7,
  "address": "0x1E04f5046500e5369E17AF993Dc60aC29D83efc9",
  "network": "base",
  "product": "scanpay.nonce",
  "chain_id": "eip155:8453",
  "price_usd": 0.002,
  "next_nonce": 7
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/wallet-nonce-lookup-base-ethereum-314ea724/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from scanpay-edge.alextaghiashvili.workers.dev](https://www.zero.xyz/host/scanpay-edge.alextaghiashvili.workers.dev/llms.txt)