# Get Subnet Registration Cost History

Returns historical costs to register a subnet, with block numbers and timestamps.

_Source: https://beta.taostats.io/docs/api-reference/subnet/get-subnet-registration-cost-history_

_Last reviewed: 2026-09-18_

```http
GET https://api.taostats.io/api/subnet/registration_cost/history/v1
```

Requires an API key in the `Authorization` header.

Returns historical costs to register a subnet, with block numbers and timestamps.

## Try it

Try this request in the browser on the HTML version of this page, or use the code samples below.

### Examples

Track how the subnet registration cost has changed over time

```text
https://api.taostats.io/api/subnet/registration_cost/history/v1?order=block_number_desc&limit=100
```

### Code samples

**cURL**

```bash
curl -H "Authorization: <YOUR_API_KEY>" \
  "https://api.taostats.io/api/subnet/registration_cost/history/v1?limit=100&order=block_number_desc"
```

**JavaScript**

```js
const response = await fetch('https://api.taostats.io/api/subnet/registration_cost/history/v1?limit=100&order=block_number_desc', {
  headers: {
    Authorization: '<YOUR_API_KEY>',
  },
});
const data = await response.json();
```

**Python**

```python
import requests

response = requests.get(
    "https://api.taostats.io/api/subnet/registration_cost/history/v1?limit=100&order=block_number_desc",
    headers={"Authorization": "<YOUR_API_KEY>"},
)
data = response.json()
```

## Parameters

| Name | In | Type | Required | Description |
| --- | --- | --- | --- | --- |
| `block_number` | query | `integer (int32)` |  | The exact block number |
| `block_start` | query | `integer (int32)` |  | Start of block range (inclusive) |
| `block_end` | query | `integer (int32)` |  | End of block range (inclusive) |
| `timestamp_start` | query | `integer (int64)` |  | Start of timestamp range in Unix timestamp (seconds since 1970-01-01) (inclusive) |
| `timestamp_end` | query | `integer (int64)` |  | End of timestamp range in Unix timestamp (seconds since 1970-01-01) (inclusive) |
| `page` | query | `integer (int32)` |  | The page number of the response. |
| `limit` | query | `integer (int32)` |  | The number of responses. max is 200, |
| `order` | query | `string` |  | One of `block_number_asc`, `block_number_desc`, `timestamp_asc`, `timestamp_desc`. |

## Responses

### `200` — Subnet registration cost retrieved successfully

| Field | Type | Required |
| --- | --- | --- |
| `data` | `array` | Yes |
| `data[].block_number` | `integer (int32)` | Yes |
| `data[].is_purchase` | `boolean` | Yes |
| `data[].registration_cost` | `string` | Yes |
| `data[].timestamp` | `string (date-time)` | Yes |
| `pagination` | `object` | Yes |
| `pagination.current_page` | `integer (int32)` | Yes |
| `pagination.next_page` | `integer (int32), nullable` |  |
| `pagination.per_page` | `integer (int32)` | Yes |
| `pagination.prev_page` | `integer (int32), nullable` |  |
| `pagination.total_items` | `integer (int32)` | Yes |
| `pagination.total_pages` | `integer (int32)` | Yes |

**Example response**

```json
{
  "data": [
    {
      "block_number": 4107489,
      "registration_cost": "1223897705583",
      "timestamp": "2024-10-23T17:23:24Z"
    },
    {
      "block_number": 4102273,
      "registration_cost": "1406549136847",
      "timestamp": "2024-10-22T23:59:48Z"
    }
  ],
  "pagination": {
    "current_page": 1,
    "next_page": 2,
    "per_page": 5,
    "prev_page": null,
    "total_items": 584,
    "total_pages": 117
  }
}
```

### Other responses

| Status | Meaning |
| --- | --- |
| `400` | Bad request |
| `404` | Subnet registration cost not found |
| `500` | Internal server error |

Every request needs an `Authorization` header holding your API key — see [Getting started with the Taostats API](https://beta.taostats.io/docs/start-here/getting-started-with-taostats-api).