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 a Helius account and generate an API key.

Guide: https://www.helius.dev/docs/agents/cli.md
Full instructions: https://dashboard.helius.dev/agents.md

Step 1: Install CLI

Programmatically create accounts and get API keys via CLI:

npm install -g helius-cli

Step 2: Generate Keypair

helius keygen

Output: Creates keypair at ~/.helius/keypair.json

Returns: Wallet address to fund

Step 3: Fund Wallet (Autopay only)

Skip this step if paying via the hosted payment link (the default signup mode, finalized with helius signup --resume). Autopay (--pay) pays USDC from the local keypair, which must be funded first.

For autopay, send to the wallet address from Step 2:

• Plan USDC (token: EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v)
• ~0.001 SOL

Step 4: Signup and Get API Key

Two payment modes:

# Default: prints a hosted payment link — pay with any wallet in the browser
helius signup --email you@example.com --first-name Jane --last-name Doe --json

# After paying via the link, finalize the account
helius signup --resume --json

# Or autopay from the funded local keypair (Step 3); Agent is the default plan
helius signup --plan agent --pay --email you@example.com --first-name Jane --last-name Doe --json

Note: the default helius signup returns a hosted payment URL, not an API key. The success fields below come from helius signup --resume or autopay (--pay).

Success Response from --resume or --pay (exit code 0):

{
  "status": "SUCCESS",
  "apiKey": "your-api-key-here",
  "endpoints": {
    "mainnet": "https://mainnet.helius-rpc.com/?api-key=your-api-key-here",
    "devnet": "https://devnet.helius-rpc.com/?api-key=your-api-key-here"
  },
  "credits": 1000000
}

Extract API key: response.apiKey

Extract RPC URL: response.endpoints.mainnet or response.endpoints.devnet

Quick Reference

• Mainnet RPC: https://mainnet.helius-rpc.com/?api-key=YOUR_API_KEY
• Mainnet RPC (Gatekeeper Beta): https://beta.helius-rpc.com/?api-key=YOUR_API_KEY
• Devnet RPC: https://devnet.helius-rpc.com/?api-key=YOUR_API_KEY
• Mainnet WSS: wss://mainnet.helius-rpc.com/?api-key=YOUR_API_KEY (LaserStream WebSocket: standard Solana subscriptions plus Helius extensions)
• Mainnet WSS (Gatekeeper Beta): wss://beta.helius-rpc.com/?api-key=YOUR_API_KEY (LaserStream WebSocket: standard Solana subscriptions plus Helius extensions)
• Devnet WSS: wss://devnet.helius-rpc.com/?api-key=YOUR_API_KEY (LaserStream WebSocket: standard Solana subscriptions plus Helius extensions)
• Auth: API key via query parameter (?api-key=YOUR_API_KEY)
• Billing: https://www.helius.dev/docs/billing/llms.txt
• Dashboard: https://dashboard.helius.dev
• Status: https://helius.statuspage.io

API Documentation

Solana RPC

Standard Solana JSON-RPC methods with enhanced performance.
https://www.helius.dev/docs/api-reference/rpc/http/llms.txt

LaserStream WebSocket

Helius's WebSocket streaming product. Serves the standard Solana WebSocket subscriptions plus Helius extensions (transactionSubscribe, enhanced accountSubscribe) for advanced filtering on a single unified endpoint, on the same backend as LaserStream gRPC. Standard methods are available on all plans; Helius extensions require a Developer, Business, or Professional plan.
https://www.helius.dev/docs/api-reference/rpc/websocket/llms.txt

Solana DAS API

Unified interface for all Solana digital assets: NFTs, compressed NFTs, fungible tokens.

• Overview: https://www.helius.dev/docs/das-api.md
• API index: https://www.helius.dev/docs/api-reference/das/llms.txt

Solana Enhanced Transactions API (legacy, maintenance mode)

Parsed, human-readable transaction data with automatic labeling. Legacy product in maintenance mode — its successor is Parsed Events (below); use Parsed Events for new builds.

• Parsed Events overview: https://www.helius.dev/docs/parsed-events.md
• Parsed Events quickstart: https://www.helius.dev/docs/parsed-events/quickstart.md
• Migration guide: https://www.helius.dev/docs/parsed-events/guides/migrate-from-enhanced-transactions.md

Helius Parsed Events (open beta)

Parse transaction signatures or address history into decoded instructions, transfers, and summaries over REST and GraphQL. Successor to Enhanced Transactions, built on the same IDL catalog (3,600+ programs) as Parsed Streams. Available on paid plans — authenticate with your API key. Base URL: https://mainnet.helius-rpc.com. REST methods: POST /v1/parsed-events/transactions, POST /v1/parsed-events/transaction-history. GraphQL: POST /v1/parsed-events/graphql.

• Overview: https://www.helius.dev/docs/parsed-events.md
• Quickstart and REST reference: https://www.helius.dev/docs/parsed-events/quickstart.md
• API reference: https://www.helius.dev/docs/api-reference/parsed-events/overview.md
• Response field reference: https://www.helius.dev/docs/parsed-events/parsed-response.md
• Query with GraphQL: https://www.helius.dev/docs/parsed-events/guides/query-with-graphql.md
• Migrate from Enhanced Transactions: https://www.helius.dev/docs/parsed-events/guides/migrate-from-enhanced-transactions.md

Helius LaserStream gRPC

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Helius Sender

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Common Use Cases

Key Concepts