---
title: "eth_getTransactionCount"
description: "Returns the transaction count (nonce) for an address. Use the pending tag on a Flashblocks endpoint to include pre-confirmed transactions."
source: https://basehub.org/api-reference/eth/eth_gettransactioncount/
---
Returns the number of transactions sent from an address. The value is the account nonce — pass it as `nonce` when constructing the next transaction.

On a Flashblocks endpoint (`https://mainnet-preconf.base.org`), querying with `"pending"` returns the nonce inclusive of every pre-confirmed transaction and refreshes every ~200ms. This eliminates nonce gaps when an agent submits transactions at high frequency.

## Parameters

| Name | Type | Required | Description |
| --- | --- | --- | --- |
| `address` | string | Yes | The 20-byte address to query. |
| `block` | string | Yes | A block number in hex, or one of `"latest"`, `"pending"`, `"safe"`, `"finalized"`, `"earliest"`. Use `"pending"` against a Flashblocks endpoint to include all pre-confirmed transactions in the count. |

## Returns

| Field | Type | Description |
| --- | --- | --- |
| `result` | string | The transaction count (nonce) as a hexadecimal string. |

## Example

### Request (standard, latest confirmed)

```bash
curl https://mainnet.base.org \
  -X POST \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "method": "eth_getTransactionCount",
    "params": ["0x742d35Cc6634C0532925a3b8D4C9dD0b4f3BaEa", "latest"],
    "id": 1
  }'
```

### Request (Flashblocks pending nonce, ~200ms)

```bash
curl https://mainnet-preconf.base.org \
  -X POST \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "method": "eth_getTransactionCount",
    "params": ["0x742d35Cc6634C0532925a3b8D4C9dD0b4f3BaEa", "pending"],
    "id": 1
  }'
```

### Response

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "result": "0x4d2"
}
```