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Onchain webhooks enable developers to receive real-time notifications for any event from any contract on Base with guaranteed delivery.
Webhooks are currently in Beta. Join our Discord to provide feedback and stay updated on new features.

Quickstart

Create your first webhook subscription in minutes

Multi-Wallet Webhooks

Monitor up to 100 wallet addresses with a single subscription

Verify Signatures

Learn how to validate the integrity of webhook events

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Key features

  • Guaranteed Delivery: Receive events with an at-least-once delivery guarantee
  • Robust Retries: Exponential backoff with up to 60 retries per event
  • Fresh Data: < 500ms end-to-end from tip of chain
  • Multi-Wallet Monitoring: Watch up to 100 wallet addresses under a single subscription with wallet.activity.multi

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Use cases

  • Stablecoin Movement: Subscribe to USDC transfers and get notified instantly when digital dollars change hands
  • NFT Ownership Tracking: Track wallet transfers on any ERC721 contract
  • New Token Pair Creation: Get notified when a new Uniswap pool is initialized
  • Yield Emission Changes: Optimize yield in real-time by tracking changes in vault emissions
  • Exchange & Portfolio Monitoring: Track ERC-20 activity across hundreds of user addresses without one subscription per address
  • …and many more! Flexible for many use cases.

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Supported networks

  • Base mainnet
  • Base Sepolia testnet