Helius

Helius

This connector reads the Solana blockchain through Helius: standard Solana RPC (https://mainnet.helius-rpc.com), the DAS API for NFTs and tokens, Enhanced Transactions for human-readable history and the Wallet API (https://api.helius.xyz/v1/wallet, beta). Everything is read-only: no transaction is signed or sent.

Setup (2 minutes)

1. Sign up at https://dashboard.helius.dev (the Free plan works).
2. Open API Keys and copy a key into HELIUS_API_KEY. It is sent as the api-key query parameter.
3. Run helius_get_epoch_info to check the key.

Workflow

• Balances: helius_get_balance for SOL in lamports (divide by 1,000,000,000), helius_get_assets_by_owner with show_fungible and show_native_balance for everything a wallet holds, helius_get_token_accounts for raw token accounts by owner or mint, helius_get_wallet_balances for a USD-valued portfolio.
• One asset or token: helius_get_asset with the mint address.
• History: helius_get_address_transactions (readable types and transfers, 100 per call, page with before_signature), helius_get_wallet_history (balance changes per transaction), helius_get_wallet_transfers (transfers only), or helius_get_signatures_for_address (raw signatures, up to 1000) followed by helius_get_transaction or helius_parse_transactions for details.
• Who is this wallet: helius_get_wallet_identity (exchanges, protocols, known entities) and helius_get_wallet_funded_by (first SOL funder).
• Chain status: helius_get_epoch_info.

Units and times: SOL amounts from RPC are lamports (10^9 per SOL). Token amounts from helius_get_token_accounts are raw integers; divide by 10^decimals of the mint. blockTime and timestamp are Unix seconds (UTC).

Credits and limits: each plan has monthly credits (Free 1M). Standard RPC calls cost 1 credit, DAS and Enhanced calls more, every Wallet API call 100 credits. Rate limits on the Free plan: RPC 10 requests per second, DAS and Enhanced APIs 2 per second. Prefer the RPC and DAS tools for routine questions and the Wallet API for the questions only it answers.

Errors: 401 means a missing or wrong API key. 429 means the plan rate limit or the monthly credits are used up. RPC errors come back as a JSON-RPC error object (for example an invalid address). The Wallet API answers 404 when it knows no identity or funder for the wallet.

Limitations: mainnet only (devnet is not configured). Enhanced Transactions is in maintenance mode at Helius; the Wallet API is beta and its formats may change. Webhooks, streaming, priority fees and sending transactions are not part of this connector.