---
url: https://www.helius.dev/docs
last_updated: 2026-02-03
---

# Helius Documentation

The leading Solana RPC and infrastructure platform. Fast, reliable APIs for building on Solana.

## Getting Started

1. Sign up at https://dashboard.helius.dev
2. Get your API key
3. Start building with any of our APIs below

## Getting Started (Agents)

Programmatically create accounts and get API keys via CLI:
```bash
npm install -g helius-cli
```

Full instructions: https://dashboard.helius.dev/agents

## Quick Reference

- Mainnet RPC: https://mainnet.helius-rpc.com/?api-key=YOUR_API_KEY
- Devnet RPC: https://devnet.helius-rpc.com/?api-key=YOUR_API_KEY
- Auth: API key via query parameter (?api-key=YOUR_API_KEY)
- Dashboard: https://dashboard.helius.dev
- Status: https://helius.statuspage.io

## API Documentation

### Solana RPC
Standard Solana JSON-RPC methods with enhanced performance.
/docs/api-reference/rpc/http/llms.txt

### Solana WebSockets (Standard)
Standard Solana RPC subscriptions for real-time data. All plans.
/docs/api-reference/rpc/websocket/llms.txt

### Helius Enhanced WebSockets
Advanced filtering with automatic transaction parsing. Business+ plans.
/docs/enhanced-websockets/llms.txt

### Solana DAS API
Unified interface for all Solana digital assets: NFTs, compressed NFTs, fungible tokens.
/docs/api-reference/das/llms.txt

### Solana Enhanced Transactions API
Parsed, human-readable transaction data with automatic labeling.
/docs/api-reference/enhanced-transactions/llms.txt

### Helius LaserStream gRPC
Lowest latency data streaming via gRPC.
/docs/api-reference/laserstream/grpc/llms.txt

### Helius Sender
Lowest latency transaction sending service.
/docs/api-reference/sender/llms.txt

### Helius Shred Delivery
Specialized delivery of raw Solana shreds via UDP.
/docs/shred-delivery/llms.txt

### Helius Priority Fee API
Optimal priority fee estimation for transaction landing.
/docs/api-reference/priority-fee/llms.txt

### Dedicated Nodes
Private Solana nodes with no rate limits, no credits, and full Yellowstone gRPC support.
/docs/dedicated-nodes/llms.txt

### Solana Webhooks
Real-time HTTP POST notifications for blockchain events.
/docs/api-reference/webhooks/llms.txt

### ZK Compression API
Compressed account and token operations.
/docs/api-reference/zk-compression/llms.txt

### Deprecated APIs

| Deprecated | Use Instead | Reason |
|------------------|-------------|--------|
| `mintCompressedNft` | Use Metaplex Bubblegum SDK directly | Helius mint API is deprecated |
| `queryMetadataV1` | `getAsset` or `searchAssets` (DAS API) | Token Metadata API is deprecated |

## Plans

| Feature | Free | Developer $49/mo | Business $499/mo | Professional $999/mo |
|---------|------|------------------|------------------|----------------------|
| Monthly credits | 1M | 10M | 100M | 200M |
| RPC rate limit | 10 req/s | 50 req/s | 200 req/s | 500 req/s |
| DAS API | 2 req/s | 10 req/s | 50 req/s | 100 req/s |
| Enhanced APIs | 2 req/s | 10 req/s | 50 req/s | 100 req/s |
| WebSockets | ✓ | ✓ | ✓ | ✓ |
| Enhanced WebSockets | — | — | ✓ | ✓ |
| LaserStream gRPC | — | Devnet | Devnet | Devnet + Mainnet |
| Support | Community | Chat | Priority Chat | Slack/Telegram |

### Data Add-ons (Professional only)

- 5TB ($500/mo)
- 10TB ($900/mo)
- 25TB ($2,000/mo)
- 50TB ($2,500/mo)
- 100TB ($4,500/mo)

Full details: /docs/billing/plans.md

### Enterprise Plans

- Custom rate limits
- Volume discounts
- SLA guarantees. 
- Contact sales: https://www.helius.dev/contact

## Rate Limits

### Standard Rate Limits

| Plan | Price | RPC | DAS & Enhanced APIs |
|------|-------|-----|---------------------|
| Free | $0/mo | 10 req/s | 2 req/s |
| Developer | $49/mo | 50 req/s | 10 req/s |
| Business | $499/mo | 200 req/s | 50 req/s |
| Professional | $999/mo | 500 req/s | 100 req/s |

### Special Rate Limits

| Endpoint | Free | Developer | Business | Professional |
|----------|------|-----------|----------|--------------|
| Helius Sender | 15/s | 15/s | 15/s | 15/s |
| `sendTransaction` | 1/s | 5/s | 50/s | 100/s |
| `getProgramAccounts` | 5/s | 25/s | 50/s | 75/s |
| `getValidityProof` (ZK) | 1/s | 5/s | 10/s | 20/s |

| Resource | Free | Developer | Business | Professional |
|----------|------|-----------|----------|--------------|
| WebSocket Connections | 5 | 150 | 250 | 250 |
| Enhanced WebSockets | — | — | ✓ | ✓ |
| LaserStream (Mainnet) | — | — | — | ✓ |
| LaserStream (Devnet) | — | ✓ | ✓ | ✓ |

Full details: /docs/billing/rate-limits.md

## Credits

| Credits | Service |
|---------|---------|
| 0 | Sender |
| 1 | Standard RPC calls, getProgramAccountsV2, getTokenAccountsByOwnerV2, simulateBundle, Priority Fee API, sendTransaction (staked connections), Webhook events, getSignatureStatuses (with `searchTransactionHistory: false`) |
| 3 | LaserStream gRPC (per 0.1 MB), Enhanced WebSockets (per 0.1 MB) |
| 10 | getProgramAccounts, DAS API (all methods), ZK Compression API, getBlock, getBlocks, getBlocksWithLimit, getBlockTime, getTransaction, getSignaturesForAddress, getInflationReward, getSignatureStatuses (with `searchTransactionHistory: true`) |
| 100 | Enhanced Transactions API, Webhook management (create/edit/delete), getTransactionsForAddress, getValidityProof |

Full details: /docs/billing/credits.md

## Common Use Cases

| I'm building... | Use these Helius products |
|-----------------|---------------------------|
| Trading bot | Helius Sender (fast tx submission) + Priority Fee API + LaserStream (real-time prices) |
| Wallet app | DAS API (getAssetsByOwner) + getTransactionsForAddress (complete history with token accounts) |
| NFT marketplace | DAS API (searchAssets, getAssetsByGroup) + Webhooks (track sales/listings) |
| Token launcher | Helius Sender + Priority Fee API + Webhooks (monitor new token) |
| Analytics dashboard** | Enhanced Transactions API + getTransactionsForAddress (historical data) |
| DeFi protocol | LaserStream (real-time account updates) + Helius Sender + Priority Fee API |
| Sniper/MEV bot | LaserStream gRPC (lowest latency) + Helius Sender (staked connections) |
| Portfolio tracker | DAS API (getAssetsByOwner with showFungible) + Enhanced Transactions |
| Airdrop tool | AirShip (95% cheaper with ZK compression) |
| Jupiter/swap integration | Helius RPC + Helius Sender for transaction submission |

## Which API should I use?

| Need | API |
|------|-----|
| Get wallet NFTs and tokens | DAS API |
| Parse transaction history | Enhanced Transactions |
| Real-time event notifications (HTTP) | Webhooks |
| Real-time streaming (WebSocket) | WebSockets |
| Lowest latency streaming | LaserStream gRPC |
| Standard Solana RPC calls | RPC |
| Estimate priority fees | Priority Fee API |
| Work with compressed accounts | ZK Compression |

## Don't Confuse These

| If you want to... | Use this | NOT this | Why |
|-------------------|----------|----------|-----|
| Get wallet's NFTs and tokens | `getAssetsByOwner` (DAS API) | `getTokenAccountsByOwner` | `getTokenAccountsByOwner` returns raw accounts, not token metadata |
| Get complete transaction history | `getTransactionsForAddress` | `getSignaturesForAddress` | `getTransactionsForAddress` includes token accounts and `getSignaturesForAddress` does not |
| Get transaction history for cNFTs | `getSignaturesForAsset` (DAS API) | `getSignaturesForAddress` | `getSignaturesForAddress` doesn't work for compressed NFTs |
| Stream real-time data (new projects) | LaserStream gRPC | Yellowstone gRPC on dedicated nodes | LaserStream is simpler, provides 24-hour replay, supports auto-reconnects | 
| Send transactions reliably | Helius Sender (dual routes to validators + Jito) | Standard `sendTransaction` | sendTransaction uses a single path and has lower landing rates |
| Get priority fee estimates | `getPriorityFeeEstimate` | `getRecentPrioritizationFees` | `getRecentPrioritizationFees` requires manual calculation |
| Search NFTs by collection | DAS API `getAssetsByGroup` or `searchAssets` | `getProgramAccounts` | `getProgramAccounts` is expensive, slow, and data could be unindexed |
| Get real-time data | Enhanced WebSockets or LaserStream gRPC | Polling for real-time data | Polling is inefficient, higher latency, uses credits |

## Key Concepts

| Term | Definition |
|------|------------|
| DAS (Digital Asset Standard) | Standardized API for querying NFTs, tokens, and compressed assets with a unified interface |
| cNFT (Compressed NFT) | NFTs stored in merkle trees instead of individual accounts; 1000x cheaper to mint |
| ZK Compression | Technology to reduce on-chain storage costs by 98% using zero-knowledge proofs |
| Helius Sender | Ultra low latency transaction submission service routing through staked connections (via Solana's largest validator) and Jito simultaneously |
| LaserStream | Helius's managed gRPC streaming service with historical replay and auto-reconnection |
| Yellowstone gRPC | Open-source Solana Geyser plugin for streaming; available on Helius dedicated nodes |
| Priority Fee | Additional fee (in microlamports) to prioritize transaction inclusion in blocks |
| Staked Connections | Direct connections to validators through stake-weighted routing for faster and more reliable transaction landing |
| Associated Token Account (ATA) | The standard token account address derived from a wallet + mint; holds tokens on behalf of wallet |
| Commitment Level | Transaction finality: `processed` (fastest, may revert), `confirmed` (basically final), `finalized` (guaranteed) |

## Guides
- Quickstart: /docs/quickstart.md
- Getting Data: /docs/getting-data.md
- Data Streaming: /docs/data-streaming.md
- Data Streaming quickstart: /docs/data-streaming/quickstart.md
- Authentication: /docs/api-reference/authentication.md
- Endpoints: /docs/api-reference/endpoints.md
- Autoscaling: /docs/billing/autoscaling.md
- Pay with Crypto: /docs/billing/pay-with-crypto.md

## SDKs
Official SDKs that wrap all Helius APIs with type-safe methods and built-in error handling.

- Node.js: https://github.com/helius-labs/helius-sdk
- Rust: https://github.com/helius-labs/helius-rust-sdk
- SDK Overview: /docs/sdks.md
- Rust SDK Docs: https://docs.rs/helius/latest/helius/

## Developer Tools

- Helius MCP: /docs/helius-mcp.md
- Orb Explorer: https://orbmarkets.io
- AirShip: /docs/airship/getting-started.md

## Resources
- Dashboard: https://dashboard.helius.dev
- Status: https://helius.statuspage.io
- Discord: https://discord.com/invite/6GXdee3gBj
- Support: https://dashboard.helius.dev/support
- FAQs: /docs/faqs.md
- Error Codes: /docs/faqs/error-codes.md