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Helius Docs

Helius is an enterprise-grade Solana development platform offering best-in-class RPCs, APIs and data streaming services.

Overview

Welcome to Helius

Make your first API call using Helius in just a few steps.

Quickstart

Solana RPC API pricing plans with flexible rate limits and credit-based billing. Global infrastructure across 11+ locations. Free tier available for developers.

Plans, Rate Limits & Credits

Learn how to quickly connect to Helius Solana RPC nodes

How to stop your Helius plans from being abused by malicious actors.

Protect Your Keys

In-depth technical insights into optimizing Solana RPC usage.

Optimization Techniques

RPC Optimization Techniques

Get real-time data from the Solana blockchain.

Data Streaming

Get started with Helius data streaming in minutes.

Learn how to reliably send and confirm transactions on Solana using Helius.

The recommended, step-by-step guide for building a robust, production-grade transaction sending workflow on Solana.

Sending Transactions Manually

Ultra-low latency transaction submission with dual routing to validators and Jito infrastructure. No credits consumed, global endpoints, optimized for high-frequency trading.

Learn how to use Helius Sender for ultra-low latency transaction submission with dual routing, no credit usage, and global endpoints optimized for traders.

Helius Sender (For Traders)

Optimize your transactions to minimize confirmation latency and maximize delivery rates

Guide: Optimizing Transactions

Explore Helius APIs and tools for efficiently querying, indexing, and retrieving data from the Solana blockchain to power your applications with comprehensive on-chain information.

Getting Data from Solana

Learn how to retrieve and query data for all Solana assets including NFTs and SPL tokens using Helius APIs

Get Assets

How to get Assets

Master the searchAssets endpoint to discover NFTs, compressed assets, and fungible tokens on Solana.

Search Assets

Transform complex Solana blockchain transactions into human-readable data with Helius Enhanced Transactions API. Parse transaction details, fetch history, and understand on-chain activity without manual decoding.

Enhanced Transactions API

Dedicated nodes optimized for gRPC streaming - combine with shared plans for full functionality

Dedicated Nodes

Getting Started

Getting Started with Dedicated Nodes

Optimize Performance and Maintain Node Health

Best Practices

Dedicated Nodes Best Practices

The most cost-efficient way of minting large numbers of digital assets in crypto.

What is NFT compression on Solana?

ZK Compression is a generalized compression framework that allows developers to store data on Solana at a fraction of the cost.

What is ZK Compression on Solana?

Learn how to stake SOL on Solana using the Helius Node.js SDK with clean, programmatic flows

How to Stake With Helius Programmatically

Learn how to set up autoscaling to ensure uninterrupted service when you exceed your credit limits.

Autoscaling

Pay with Crypto

SDKs

Stay up-to-date with the latest Helius updates, new features, improvements, and changes to our APIs and services.

Changelog

Helius offers access to Solana blockchain data through a comprehensive suite of APIs.

API Reference overview

Learn how to authenticate your Helius API requests

Authentication

Helius provides multiple endpoint types to suit different application needs. This guide outlines all available connection options for interacting with the Helius API.

Endpoints

Solana RPC URLs and Endpoints

Learn about common RPC error messages and potential solutions

Common Error Codes

How to contact Helius support for billing, account, or technical questions.

Contact Support

Answers to common questions about Helius services, billing, and account management.

Frequently Asked Questions

Check the Helius system status for real-time service availability and performance information.

API Reference

Solana RPC APIs

Solana APIs

Data Streaming APIs

Event Listening APIs

Deprecated APIs

Getidentity