Helius is a Solana developer infrastructure platform for applications that need to read blockchain state, follow activity in real time or submit transactions. It combines authenticated mainnet and devnet RPC endpoints with indexed APIs, webhooks and streaming services managed from a web dashboard.
What you can do with Helius
- Read Solana data: use standard JSON-RPC methods or Helius data endpoints to retrieve accounts, transaction history, transfers, blocks, tokens, NFTs and compressed assets.
- Listen for activity: receive server-side webhooks or subscribe to account, program and transaction updates through LaserStream WebSocket or gRPC.
- Send transactions: submit signed transactions through regular RPC endpoints or Sender routing, and query priority-fee estimates for supported workflows.
- Build backend services: supply wallet views, indexers, alerts, exchange infrastructure, analytics systems and automated Solana applications with onchain data.
Fit, requirements and limits
Useful for: developers and technical teams building Solana applications, backends, data pipelines or transaction systems. Less suitable for: someone looking for a consumer wallet, a point-and-click trading app or one provider covering several blockchains.
Account required: yes. Helius authenticates API requests with a project API key. Wallet required: not for account access or read-only requests; a transaction must have the appropriate signature before it can be submitted. Basic integration requires familiarity with HTTP requests, JSON-RPC or an SDK.
Helius has a free plan and paid monthly plans. Credits, request rates, support and access to some streaming or trading infrastructure vary by plan. Certain products, including raw Shred Delivery and data add-ons, have separate charges. The standard platform is focused on Solana rather than multichain development.