// Build
Blockchain Data & Realtime
Querying blockchain state directly is slow and expensive. We build data indexing infrastructure — The Graph subgraphs, Moralis Streams, and custom indexers — that serve on-chain data at the speed of traditional APIs.
// Key benefits
What makes this service valuable
The Graph subgraph development
We build and deploy custom subgraphs that index the events you care about, making complex on-chain queries fast and cost-free at query time.
Real-time event streaming
Moralis Streams and WebSocket providers deliver real-time blockchain events to your application — block-by-block updates for trading feeds, live balance updates, and transaction notifications.
Custom indexers
For complex indexing logic that The Graph cannot express, we build custom Node.js indexers that maintain a PostgreSQL or MongoDB database of processed on-chain events.
// Details
Making blockchain data accessible
Raw blockchain data is difficult to work with — events are unindexed, historical queries require full archive node access, and data relationships are implicit in contract interactions. Indexing solves all of this.
We design the right indexing strategy for your data access patterns: The Graph for complex queries, Moralis Streams for real-time events, or custom indexers for proprietary logic.
// What this includes
- The Graph subgraph development and deployment
- GraphQL schema design for on-chain data
- Moralis Streams for real-time event feeds
- Custom Node.js indexer development
- Archive node queries (Alchemy / Infura)
- Historical data backfill
- WebSocket event subscriptions
// Deliverables
What you receive
Every engagement produces clear, documented deliverables. Here is exactly what is included in our blockchain data & realtime service.
- 01The Graph subgraph (deployed to hosted or decentralised network)
- 02GraphQL API for indexed data
- 03Real-time event streaming setup
- 04Custom indexer (if required)
- 05Documentation for subgraph queries
- 06Monitoring for indexer health
// FAQ
Common questions about blockchain data & realtime
When should I use The Graph vs a custom indexer?+
The Graph is excellent for event-based indexing of EVM contracts with well-structured events. Custom indexers are needed when you need complex derived state, cross-contract relationships, or data transformations that Subgraph AssemblyScript cannot express.
How fresh is the data in a subgraph?+
Subgraphs are typically 1–5 blocks behind the head (15–75 seconds on Ethereum). For lower latency, WebSocket subscriptions or Moralis Streams provide near-real-time updates.
Ready to get started with blockchain data & realtime?
Share your requirements with our team. We respond within one business day with a clear plan from discovery to delivery.