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

# Webhooks

> Receive real-time HTTP notifications when things happen across your CDP integration.

CDP webhooks deliver real-time HTTP notifications for events across your integration. All CDP webhooks share the same delivery infrastructure, signature scheme, and subscription API.

<CardGroup cols={2}>
  <Card title="Quickstart" icon="rocket" href="/webhooks/quickstart">
    Create your first webhook subscription in minutes.
  </Card>

  <Card title="Verify signatures" icon="shield-check" href="/webhooks/verify-signatures">
    Validate that incoming webhook events are from Coinbase.
  </Card>
</CardGroup>

## Event types

<CardGroup cols={2}>
  <Card title="Wallets" icon="wallet" href="/webhooks/wallets">
    Track transactions, signing operations, and delegation grants for Non-Custodial Wallets.
  </Card>

  <Card title="Transfers" icon="arrows-rotate" href="/webhooks/transfers/overview">
    Real-time status updates for custodial account transfers and payouts.
  </Card>

  <Card title="Onramp & Offramp" icon="money-bill-transfer" href="/webhooks/onramp">
    Real-time status updates for buy and sell transactions.
  </Card>

  <Card title="Onchain Activity" icon="wave-pulse" href="/webhooks/onchain-activity/overview">
    Monitor smart contract events and ERC-20 transfers on Base.
  </Card>
</CardGroup>

## Key features

* **Guaranteed delivery**: at-least-once delivery for every event.
* **Robust retries**: exponential backoff with up to 60 retries per event.
* **Fresh data**: \< 500ms end-to-end from chain tip for onchain data events.
* **Multi-address monitoring**: watch up to 100 wallet addresses under a single subscription with `wallet.activity.multi`.