Event Indexing Solutions
| Provider | Type | Real-time | Chains |
|---|---|---|---|
| The Graph | Subgraphs | ✅ | 40+ |
| Covalent | Unified API | ✅ | 200+ |
| Moralis | Streams | ✅ | 20+ |
| Alchemy | Notify | ✅ | 15+ |
| QuickNode | Istanbul | ✅ | 15+ |
The Graph - Subgraphs
Decentralized indexing protocol.
query GetTransfers {
transfers(
where: { from: "0x..." }
first: 10
) {
id
from
to
value
timestamp
}
}
Moralis Streams
Real-time webhook notifications.
const stream = await Moralis.Streams.add({
chains: ["eth", "polygon"],
description: "Transfer events",
webhookUrl: "https://...",
includeContractLogs: true
});
When to Use Each
The Graph - Best for DeFi & NFT
Decentralized, community-curated subgraphs. Great for popular protocols.
Covalent - Best for Multi-chain
200+ chains with unified API. Perfect for cross-chain apps.
Moralis - Best for Real-time
Easy-to-use streams with webhooks. Quickest to implement.
Start Indexing Events
Choose the right indexing solution for your dApp.