> ## Documentation Index
> Fetch the complete documentation index at: https://docs.chainstack.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Filter handling | Avalanche

> Avalanche filter JSON-RPC methods — create event and block filters, poll for changes, retrieve filter logs, and manage subscriptions on the C-Chain.

Filters are a mechanism for clients to receive notifications of changes to the Avalanche blockchain. The methods described in this section allow developers to retrieve the changes that happened since the filter was last polled or allow them to delete it.

Handling filters can be done by using the following methods:

<CardGroup>
  <Card title="eth_getFilterChanges" href="/reference/avalanche-getfilterchanges" icon="angle-right" horizontal />

  <Card title="eth_uninstallFilter" href="/reference/avalanche-uninstallfilter" icon="angle-right" horizontal />
</CardGroup>

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