01 · Solana RPC and data APIs
Helius
- Best for:
- Applications and wallets that need fast reads, transaction sends, and address history
- Pricing model:
- Subscription plans with request or credit limits
Strengths
- getTransactionsForAddress returns full, parsed transaction history for an address in a single call
- LaserStream gRPC, described with historical replay and delivery guarantees
- Webhooks for chosen addresses and events
Watch out for
- History is organized by address, not by program
- Program-wide backfills are still paid request by request