helius-python 0.3.3

Typed Python client for the Helius API

helius-python

A complete, typed Python client for Helius — the Solana developer platform.

Coverage

The goal of this library is support every function, method, endpoint, and feature that Helius exposes. If Helius ships it, this client wraps it.

• ✅ The full Solana JSON-RPC surface proxied by Helius — getAccountInfo, getBalance, getBlock, getTransaction, getProgramAccounts, getTokenAccountsByOwner, getSignaturesForAddress, and every other standard RPC method. (supported today)
• 🚧 All Helius-specific RPC extensions — enhanced transactions, DAS (Digital Asset Standard) methods, priority fee estimation, and the rest of the Helius-only RPC namespace. (in progress)
• 🚧 Every Helius REST endpoint — Enhanced Transactions API, Webhooks API, Mint API, token metadata, address lookups, and beyond. (in progress)
• 🚧 Platform features — streaming, websockets, and any new capability Helius adds to its API. The full WebSocket subscription surface (accountSubscribe, transactionSubscribe, logsSubscribe, programSubscribe, and the rest) is supported today; other platform features are in progress.

Current status: the standard Solana JSON-RPC surface, the WebSocket subscription surface, and the Admin (account management) usage endpoint are implemented today. Support for Helius RPC extensions and the remaining REST endpoints is actively being worked on.

Goals

1. Completeness — 1:1 coverage of the entire Helius API surface.
2. Type safety — fully typed responses.
3. Pythonic ergonomics — get_account_info(...) instead of getAccountInfo(...), context managers.
4. Zero magic — thin, predictable wrappers that map directly to the documented Helius API.

Installation via PyPI

pip install helius-python

Authentication

Pass your Helius API key explicitly:

from helius.solana_rpc import SolanaRpcClient

client = SolanaRpcClient(api_key="YOUR_HELIUS_API_KEY")

or set HELIUS_API_KEY as an environment variable:

export HELIUS_API_KEY=your_helius_api_key

You can also set it in a .env file at the project root and let the client pick it up automatically:

HELIUS_API_KEY=your_helius_api_key

from helius.solana_rpc import SolanaRpcClient

client = SolanaRpcClient()  # reads HELIUS_API_KEY from the environment or .env

Usage

As a context manager (recommended)

from helius.solana_rpc import SolanaRpcClient

with SolanaRpcClient(api_key="YOUR_HELIUS_API_KEY") as client:
    _ctx, balance = client.get_balance("So11111111111111111111111111111111111111112")
    _ctx, supply  = client.get_supply()
    nodes         = client.get_cluster_nodes()
    block         = client.get_block(slot=250_000_000)
    tx            = client.get_transaction("5j7s...signature...")

SolanaRpcClient implements the context-manager protocol via __enter__ / __exit__, so the underlying httpx.Client is closed cleanly when the with block exits.

With an explicit close() call

If a with block doesn't fit your code structure (e.g. the client lives on a long-lived object), call close() yourself when you're done:

from helius.solana_rpc import SolanaRpcClient

client = SolanaRpcClient(api_key="YOUR_HELIUS_API_KEY")
try:
    _ctx, balance = client.get_balance("So11111111111111111111111111111111111111112")
    _ctx, supply  = client.get_supply()
finally:
    client.close()

Client classes also implement __del__ as a safety net — if you forget to close() or use with, the underlying HTTP client is still closed when the instance is garbage-collected. Prefer with or close() regardless.

🚧 Exception & error handling is a work in progress. Today, transport errors surface as raw httpx exceptions and Helius/Solana RPC errors are not yet wrapped in typed exception classes. A consistent error hierarchy is being worked on.

Defaults

Argument	Default	Notes
base_url	"https://mainnet.helius-rpc.com"	Override to point at devnet, staging, or a custom Helius endpoint.
api_key	None → falls back to HELIUS_API_KEY from the environment, then .env	If none is provided, the constructor raises ValueError.

Per-method RPC parameters (commitment, encoding, min_context_slot, etc.) are left unset by default — the Helius/Solana server defaults apply unless you pass them explicitly.

Reference

For parameters, semantics, and return shapes, see the official Helius docs: RPC guide and API reference.

If you hit a bug, a missing parameter, or surprising behavior, please open an issue.

Supported methods

The method names map 1:1 to the Solana JSON-RPC spec, just converted to snake_case. If you know the RPC method name, you know the Python function.

Status

Actively expanding toward full coverage of the Helius API. See src/helius/solana_rpc.py for the current list of implemented methods; missing endpoints are tracked as issues and added continuously.

Solana JSON-RPC method	Python method	Helius docs
getAccountInfo	get_account_info(...)	guide, reference
getBalance	get_balance(...)	guide, reference
getBlock	get_block(...)	guide, reference
getBlockCommitment	get_block_commitment(...)	guide, reference
getBlockHeight	get_block_height(...)	guide, reference
getBlockProduction	get_block_production(...)	guide, reference
getBlocks	get_blocks(...)	guide, reference
getBlocksWithLimit	get_blocks_with_limit(...)	guide, reference
getBlockTime	get_block_time(...)	guide, reference
getClusterNodes	get_cluster_nodes()	guide, reference
getEpochInfo	get_epoch_info(...)	guide, reference
getEpochSchedule	get_epoch_schedule()	guide, reference
getFeeForMessage	get_fee_for_message(...)	guide, reference
getFirstAvailableBlock	get_first_available_block()	guide, reference
getGenesisHash	get_genesis_hash()	guide, reference
getHealth	get_health()	guide, reference
getHighestSnapshotSlot	get_highest_snapshot_slot()	guide, reference
getIdentity	get_identity()	guide, reference
getInflationGovernor	get_inflation_governor(...)	guide, reference
getInflationRate	get_inflation_rate()	guide, reference
getInflationReward	get_inflation_reward(...)	guide, reference
getLargestAccounts	get_largest_accounts(...)	guide, reference
getLatestBlockhash	get_latest_blockhash(...)	guide, reference
getLeaderSchedule	client.get_leader_schedule(...)	guide, reference
getMaxRetransmitSlot	client.get_max_retransmit_slot()	guide, reference
getMaxShredInsertSlot	get_max_shred_insert_slot()	guide, reference
getMinimumBalanceForRentExemption	get_minimum_balance_for_rent_exemption(...)	guide, reference
getMultipleAccounts	get_multiple_accounts(...)	guide, reference
getProgramAccounts	get_program_accounts(...)	guide, reference
getRecentPerformanceSamples	get_recent_performance_samples(...)	guide, reference
getRecentPrioritizationFees	get_recent_prioritization_fees(...)	guide, reference
getSignaturesForAddress	get_signatures_for_address(...)	guide, reference
getSignatureStatuses	get_signature_statuses(...)	guide, reference
getSlot	get_slot(...)	guide, reference
getSlotLeader	get_slot_leader(...)	guide, reference
getSlotLeaders	get_slot_leaders(...)	guide, reference
getStakeMinimumDelegation	get_stake_minimum_delegation(...)	guide, reference
getSupply	get_supply(...)	guide, reference
getTokenAccountBalance	get_token_account_balance(...)	guide, reference
getTokenAccountsByDelegate	get_token_accounts_by_delegate(...)	guide, reference
getTokenAccountsByOwner	get_token_accounts_by_owner(...)	guide, reference
getTokenLargestAccounts	get_token_largest_accounts(...)	guide, reference
getTokenSupply	get_token_supply(...)	guide, reference
getTransaction	get_transaction(...)	guide, reference
getTransactionCount	get_transaction_count(...)	guide, reference
getVersion	get_version()	guide, reference
getVoteAccounts	get_vote_accounts(...)	guide, reference
isBlockhashValid	is_blockhash_valid(...)	guide, reference
minimumLedgerSlot	minimum_ledger_slot()	guide, reference
requestAirdrop	request_airdrop(...)	guide, reference
sendTransaction	send_transaction(...)	guide, reference
getTransactionsForAddress	get_transactions_for_address(...)	reference
getTransfersByAddress	get_transfers_by_address(...)	guide, reference

WebSocket subscriptions

WebSocketClient wraps the Solana/Helius WebSocket subscription surface. It connects over wss:// on construction, exposes one *_subscribe / *_unsubscribe pair per subscription type, and parses incoming notifications into typed pydantic models.

from helius.laserstream.websockets import WebSocketClient

with WebSocketClient(api_key="YOUR_HELIUS_API_KEY") as ws:
    subscription = ws.account_subscribe(
        pubkey="So11111111111111111111111111111111111111112",
        commitment="confirmed",
    )

    for context, notification, sub in ws.listen():
        print(notification)  # typed AccountNotification

    ws.account_unsubscribe(subscription)

Like SolanaRpcClient, it supports the context-manager protocol and a manual close(). The constructor defaults to wss://mainnet.helius-rpc.com and reads HELIUS_API_KEY from the environment or .env when api_key is omitted; an optional proxy is also accepted.

Each *_subscribe call returns the integer subscription id. Use receive() to read a single notification or listen() to iterate over them; both yield a (context, notification, subscription) tuple where notification is the model below.

Subscribe method	Unsubscribe method	Notification model	Helius docs
account_subscribe(...)	account_unsubscribe(...)	AccountNotification	reference
block_subscribe(...)	block_unsubscribe(...)	BlockNotification	reference
logs_subscribe(...)	logs_unsubscribe(...)	LogsNotification	reference
program_subscribe(...)	program_unsubscribe(...)	ProgramNotification	reference
root_subscribe()	root_unsubscribe(...)	RootNotification	reference
signature_subscribe(...)	signature_unsubscribe(...)	SignatureNotification	reference
slot_subscribe()	slot_unsubscribe(...)	SlotNotification	reference
slots_updates_subscribe()	slots_updates_unsubscribe(...)	SlotsUpdatesNotification	reference
vote_subscribe()	vote_unsubscribe(...)	VoteNotification	reference
transaction_subscribe(...)	transaction_unsubscribe(...)	TransactionNotification	reference

Admin API

AccountManagementClient wraps the Helius admin API. Today it exposes project credit usage via get_project_usage(...), which returns a typed ProjectUsage model.

from helius.admin.admin import AccountManagementClient

with AccountManagementClient(api_key="YOUR_HELIUS_API_KEY") as admin:
    usage = admin.get_project_usage(project_id="YOUR_PROJECT_ID")
    print(usage.credits_remaining, usage.usage.rpc)

The project_id can be passed per call or set once on the constructor; if neither is provided, get_project_usage raises ValueError. The client defaults to https://admin-api.helius.xyz and, like the others, supports the context-manager protocol, a manual close(), and reads HELIUS_API_KEY from the environment or .env.

License

MIT