> For the complete documentation index, see [llms.txt](https://docs.getblock.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.getblock.io/api-reference/ethereum-eth/eth_uninstallfilter-ethereum.md).

# eth\_uninstallFilter - Ethereum

This method removes a previously created filter and frees its server-side state. Nodes automatically expire filters that haven't been polled recently (typically after \~5 minutes of inactivity), but explicit uninstall is polite server citizenship and required for long-lived clients that create many filters.

## Parameters

| Parameter  | Type   | Required | Description                                                                                                              |
| ---------- | ------ | -------- | ------------------------------------------------------------------------------------------------------------------------ |
| `filterId` | string | Yes      | Hex-encoded filter ID returned by a previous `eth_newFilter`, `eth_newBlockFilter`, or `eth_newPendingTransactionFilter` |

## Request

{% tabs %}
{% tab title="cURL" %}
{% code overflow="wrap" %}

```bash
curl --location --request POST 'https://go.getblock.io/<ACCESS-TOKEN>/' \
--header 'Content-Type: application/json' \
--data-raw '{
    "jsonrpc": "2.0",
    "method": "eth_uninstallFilter",
    "params": [
        "0x16"
    ],
    "id": "getblock.io"
}'
```

{% endcode %}
{% endtab %}

{% tab title="Axios" %}
{% code title="example.js" %}

```javascript
const axios = require('axios');

const response = await axios.post('https://go.getblock.io/<ACCESS-TOKEN>/', {
    jsonrpc: '2.0',
    method: 'eth_uninstallFilter',
    params: [
        "0x16"
    ],
    id: 'getblock.io'
}, {
    headers: { 'Content-Type': 'application/json' }
});

console.log(response.data.result);
```

{% endcode %}
{% endtab %}

{% tab title="Request" %}
{% code title="example.py" %}

```python
import requests

response = requests.post(
    'https://go.getblock.io/<ACCESS-TOKEN>/',
    headers={'Content-Type': 'application/json'},
    json={
        'jsonrpc': '2.0',
        'method': 'eth_uninstallFilter',
        'params': [
        "0x16"
    ],
        'id': 'getblock.io'
    }
)

print(response.json())
```

{% endcode %}
{% endtab %}

{% tab title="Rust" %}
{% code title="example.rs" %}

```rust
use reqwest::Client;
use serde_json::{json, Value};

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let client = Client::new();
    
    let response = client
        .post("https://go.getblock.io/<ACCESS-TOKEN>/")
        .header("Content-Type", "application/json")
        .json(&json!({
            "jsonrpc": "2.0",
            "method": "eth_uninstallFilter",
            "params": [
        "0x16"
    ],
            "id": "getblock.io"
        }))
        .send()
        .await?
        .json::<Value>()
        .await?;
    
    println!("Result: {}", response["result"]);
    Ok(())
}
```

{% endcode %}
{% endtab %}
{% endtabs %}

## Response

```json
{
    "jsonrpc": "2.0",
    "id": "getblock.io",
    "result": true
}
```

## Response Parameters

| Parameter | Type    | Description                                                                                                                             |
| --------- | ------- | --------------------------------------------------------------------------------------------------------------------------------------- |
| `jsonrpc` | string  | JSON-RPC protocol version ("2.0")                                                                                                       |
| `id`      | string  | Request identifier matching the request                                                                                                 |
| `result`  | boolean | `true` if the filter was found and removed, `false` if the filter ID didn't correspond to an active filter (already expired or invalid) |

## Use Cases

* **Filter Cleanup**: Free server-side filter state when a client is done using it
* **Server-Citizenship**: Prevent unbounded filter growth on shared endpoints
* **Reset Filter State**: Uninstall and re-create a filter to reset its polling window

## Error Handling

| Error Code | Message        | Description                           |
| ---------- | -------------- | ------------------------------------- |
| -32602     | Invalid params | Filter ID is malformed                |
| -32603     | Internal error | Node failed while removing the filter |

## Web3 Integration

{% tabs %}
{% tab title="Ethers.js" %}
{% code title="ethers-example.js" %}

```javascript
import { ethers } from 'ethers';

const provider = new ethers.JsonRpcProvider('https://go.getblock.io/<ACCESS-TOKEN>/');

const removed = await provider.send('eth_uninstallFilter', ['0x16']);
console.log('Filter removed:', removed);
```

{% endcode %}
{% endtab %}

{% tab title="Viem" %}
{% code title="viem-example.js" %}

```javascript
import { createPublicClient, http } from 'viem';
import { mainnet } from 'viem/chains';

const client = createPublicClient({
    chain: mainnet,
    transport: http('https://go.getblock.io/<ACCESS-TOKEN>/'),
});

const removed = await client.uninstallFilter({ filter });
console.log('Filter removed:', removed);
```

{% endcode %}
{% endtab %}
{% endtabs %}


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://docs.getblock.io/api-reference/ethereum-eth/eth_uninstallfilter-ethereum.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.