# EVM Nonce Lookup — Base Network

> EVM Nonce Lookup — Base Network is a paid API for AI agents from saylorinnovations.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-02).

Returns the current on-chain transaction nonce for a given Ethereum address on the Base blockchain network

## Facts

- Endpoint: GET https://saylorinnovations.com/api/evm/base/nonce/:address?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/evm-nonce-lookup-base-network-02bc9a62
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_p8BiXwS0C_AXpLeKASASj

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 evm-nonce-lookup-base-network-02bc9a62
```

Example prompt: What's the current on-chain nonce for the address 0x1234...abcd on Base? I need it before I broadcast my next transaction.

## When to prefer this

Use this endpoint when you need the on-chain nonce for a specific EVM address on the Base network specifically — for example, when constructing or debugging transactions on Base, verifying wallet activity, or detecting nonce gaps. Prefer this over generic RPC calls when you need a simple, pay-per-use REST API without managing your own RPC node.

## Known failure modes

- Invalid or malformed Ethereum address returns an error
- Address that has never transacted may return nonce of 0
- Network connectivity issues to Base RPC may cause timeouts
- Non-checksummed addresses may be rejected depending on implementation

## How this service works

EVM Nonce (base). Base account nonce for any address: confirmed nonce and pending nonce (a gap means transactions are still waiting in the mempool). Use it before sending a transaction or to detect a pending one.

## Output

Returns the current transaction nonce (integer) for the specified EVM address on the Base network, representing the number of transactions confirmed on-chain from that address

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/evm-nonce-lookup-base-network-02bc9a62/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from saylorinnovations.com](https://www.zero.xyz/host/saylorinnovations.com/llms.txt)