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Documentation Index

Fetch the complete documentation index at: https://docs.moralis.com/llms.txt

Use this file to discover all available pages before exploring further.

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Overview

Moralis Streams lets you receive real-time blockchain events directly in your backend via webhooks. Instead of polling APIs or indexing chains yourself, Streams pushes on-chain activity to you the moment it happens — based on rules you define. Streams is available on EVM, Bitcoin, and Solana.

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What Is Moralis Streams?

Moralis Streams allows you to listen to blockchain activity in real time. The product model is the same on every chain — define a stream, set filters, receive webhooks — but each chain exposes activity in its own native shape. What you can listen to depends on the chain:
  • Wallet activity (transfers, swaps, contract interactions)
  • Contract events via ABI decoding
  • ERC-20 / ERC-721 / ERC-1155 transfers and approvals (decoded for free)
  • Native and internal transactions
  • Custom on-chain conditions using advanced filters
  • Read-only contract calls at match time using Triggers
See EVM Streams for details.
When a matching event occurs, Moralis delivers a webhook to your server with a structured data payload.

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How Streams Works

At a high level:
  1. A new block is produced on-chain (or a slot, on Solana)
  2. Moralis processes and evaluates the block
  3. Your stream rules are applied
  4. Matching events are detected
  5. A webhook is delivered to your endpoint
All delivery is handled by Moralis — no nodes, polling, or infrastructure required.

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Common Use Cases

Streams is commonly used for:
  • Real-time wallet notifications (send, receive, swap, stake, burn)
  • Asset monitoring (token or NFT movement, price-sensitive events)
  • Exchange & custody flows (deposit detection, hot/cold wallet surveillance)
  • Games & apps (in-game actions, state changes, achievements)
  • Token sales & launches (participation tracking, contribution thresholds)
  • Protocol monitoring (liquidity events, contract / program interactions)
  • AI agents that react to on-chain events as they happen

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Working With Webhooks

Streams delivers events via HTTP webhooks:
  • Webhooks are sent using POST requests
  • Payloads include decoded, structured event data (EVM, Bitcoin, Solana)
  • Delivery is retried automatically on failure
  • Events can be replayed manually if needed
To ensure correctness, Moralis sends a mandatory test webhook whenever a stream is created or updated.

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Reliability & Guarantees

Streams is built for production workloads:
  • Guaranteed webhook delivery with retries
  • Automatic backoff if your service is unavailable
  • Manual replay support
  • Spam detection and filtering (EVM only)
  • Secure webhook signing on every chain

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When to Use Streams

Use Streams if you need:
  • Real-time blockchain events
  • Push-based architecture
  • Low-latency notifications
  • Reliable delivery without running infrastructure
If you only need historical data, use the Data APIs instead.

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Get Started

  • Quickstart
  • Stream Configuration
  • Webhooks
  • Tutorials

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Streams API Overview Video