# Ethereum Next Transaction Nonce

> Ethereum Next Transaction Nonce is a paid API for AI agents from appearing-clinics-show-wrote.trycloudflare.com, paid per call via x402, price unknown, status down (last checked 2026-09-15).

Returns the next pending nonce for any Ethereum address, enabling correct transaction sequencing.

## Facts

- Endpoint: GET https://appearing-clinics-show-wrote.trycloudflare.com/ethereum-nonce-sample
- Price: price unknown
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ethereum-next-transaction-nonce-a8d6c0e4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_9_9-84S37GgHI8zi7e7rM

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 ethereum-next-transaction-nonce-a8d6c0e4
```

Example prompt: What's the next transaction nonce I should use for Ethereum address 0x5D8b58bAdE65318bC95e2EAd24e6F0E2b042Aa78?

## When to prefer this

Choose this endpoint when you need to programmatically determine the correct nonce for the next Ethereum transaction from a given address, especially before signing and broadcasting raw transactions, or when diagnosing stuck or pending transactions due to nonce gaps. It is particularly useful for bots, automated pipelines, or wallets that need real-time nonce data without running a full Ethereum node.

## Known failure modes

- Invalid Ethereum address format returns an error or empty response
- Address with no transaction history may return nonce 0, which is valid but could be misinterpreted
- Network latency from Cloudflare tunnel may cause occasional timeouts
- Paid endpoint required for arbitrary address lookups — sample endpoint may only return data for a fixed demo address
- Response may lag behind mempool if node is not fully synced

## How this service works

Free live Ethereum next-nonce sample for the service receiver. Purchase any Ethereum address nonce at GET /ethereum-nonce?address=0x5D8b58bAdE65318bC95e2EAd24e6F0E2b042Aa78 for $0.0029.

## Output

Returns the next expected nonce (transaction count) for the queried Ethereum address — a non-negative integer representing how many transactions the account has sent, which must be used as the nonce field in the next submitted transaction.

## 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": [],
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/ethereum-next-transaction-nonce-a8d6c0e4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from appearing-clinics-show-wrote.trycloudflare.com](https://www.zero.xyz/host/appearing-clinics-show-wrote.trycloudflare.com/llms.txt)