# santyvv-data: Ethereum Address Nonce Lookup

> santyvv-data: Ethereum Address Nonce Lookup is a paid API for AI agents from santyvv-x402.santyvv1993.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-01).

Returns the transaction count (next nonce) for a given Ethereum address, useful for constructing transactions or detecting account activity.

## Facts

- Endpoint: GET https://santyvv-x402.santyvv1993.workers.dev/api/chain/nonce?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/santyvv-data-ethereum-address-nonce-lookup-07e3b91b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_AmOzcDRkRj4Wk4rliWZUV

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 santyvv-data-ethereum-address-nonce-lookup-07e3b91b
```

Example prompt: What is the current nonce (transaction count) for Ethereum address 0xAbCd...1234? I need it to build my next transaction correctly.

## When to prefer this

Use this endpoint when you need the current nonce for an Ethereum address to construct or sign a transaction, or when you want a quick read-only lookup of how many transactions an address has sent. It is a lightweight, pay-per-call API suited for agents that need on-demand nonce resolution without running their own Ethereum node.

## Known failure modes

- Invalid or malformed address returns an error response
- Address not found on chain returns nonce of 0 (indistinguishable from a new address)
- Network or RPC backend outage returns a 5xx error
- Missing or incorrect query parameter causes a 400 bad request

## How this service works

Transaction count (next nonce) of an address

## Output

Returns the integer transaction count (nonce) for the queried Ethereum address — this is the number of confirmed transactions sent from that address, which equals the nonce value to use for the next 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",
     "properties": {}
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/santyvv-data-ethereum-address-nonce-lookup-07e3b91b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from santyvv-x402.santyvv1993.workers.dev](https://www.zero.xyz/host/santyvv-x402.santyvv1993.workers.dev/llms.txt)