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Changelog

Stay informed about the latest updates, new features, improvements, and changes to Helius APIs and services. We’re constantly working to improve your developer experience and provide you with the best Solana infrastructure.
Want to stay updated? Join our Discord community for real-time announcements or follow us on X for the latest updates.
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August 2025

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Transaction Rebates Launch

August 20, 2025Earn automatic SOL rebates from your transactions with no additional risk of toxic MEV. Our new backrun rebate system lets you capture a share of the MEV your trades create through a simple parameter addition.Key Features:
  • 50% MEV Share: Earn 50% of the arbitrage profits your transactions generate
  • Zero Risk: Your transaction executes first, MEV is extracted after
  • One Parameter: Just add rebate-address to your RPC URL - no code changes needed
  • Immediate Payouts: Receive SOL rebates in the same block as your transaction
  • Private Auction: Vetted, KYC’d searchers only - no malicious MEV exposure
How It Works: When your trade creates arbitrage opportunities, searchers compete in a private auction to backrun your transaction. You earn from the profitable arbitrage your trade enabled, while your transaction always executes first in the bundle.

Transaction Rebates Guide

Learn how to start earning rebates from your trades

Transaction Sending Overview

Explore all transaction sending features

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Shred Delivery by Order

August 15, 2025Introducing Helius’s premier low-latency data service - the earliest possible access to Solana’s raw transaction data. Shred Delivery provides unprocessed shreds directly from our highest-staked validator for ultra-low latency trading strategies.Key Features:
  • Earliest Access: Raw shreds delivered before any processing occurs
  • Validator Advantage: Powered by Helius’s highest-staked validator on Solana
  • Unprocessed Data: Access raw shred data for custom processing pipelines
  • Turbine Priority: High stake weight ensures priority in Solana’s data propagation
  • Beta Access: Carefully provisioned with white glove support
Perfect For:
  • High-frequency trading (HFT) strategies
  • Arbitrage opportunities requiring microsecond advantages
  • Custom deshredding and processing logic
  • Applications needing the absolute lowest latency data access
Shred Delivery is currently in beta with limited access requiring approval and technical expertise for handling raw shred data.

Shred Delivery Documentation

Learn about ultra-low latency shred delivery

Request Beta Access

Apply for Shred Delivery beta access
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June 2025

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Transaction Sender Beta Launch

June 30, 2025Our new transaction sender is now open to the public in beta with many more improvements to come.Key Features:
  • Parallel Sending: Simultaneous transmission to both Jito and Helius SWQOS, which has the highest stake on the network
  • 7 Regional Endpoints: Network optimized endpoints to reduce latency
  • Beta Access: Available now through your dashboard
To Access: Navigate to Dashboard → Sender (on the left sidebar)
We’d love feedback to improve the sender as we’re making active improvements every day.

Transaction Sender Guide

Learn how to use the new transaction sender

Sending Transactions Overview

Explore all transaction sending options

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Jito Bundle Simulation Support

June 25, 2025You can now use Helius RPCs for simulating Jito bundles, enabling you to test and validate your bundle transactions before submission.What’s New:
  • Bundle Simulation: Test your Jito bundles using Helius infrastructure
  • Pre-submission Validation: Catch potential issues before sending bundles to the network
  • Seamless Integration: Works with existing Helius RPC endpoints

Simulate Bundle API

View the simulateBundle API documentation

RPC Methods

Explore all available RPC methods

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LaserStream Public Release

June 18, 2025Today, Solana gets a huge upgrade. We are finally releasing LaserStream — the fastest, most reliable way of streaming Solana blocks, transactions, and account data via gRPC.LaserStream Features:
  • Optimized Shredstream: Receive data before anyone else
  • Historical Replay & Persistence: If you disconnect, start from the slot where you disconnected and never miss data
  • Extreme Redundancy: Powered by many redundant node clusters so you never worry about downtime or your stream falling behind
  • Regional Endpoints: Available in all major regions (Tokyo, Frankfurt, Newark, Pittsburgh, Salt Lake City, Amsterdam, Singapore) — no need to wait for node availability or buy an entire node
  • Massive Scale: Listen up to 250,000 addresses per connection; up to 100 simultaneous connections
  • Ready-to-Go Client SDKs: Optional SDKs available for easy integration
  • gRPC Compatible: Works with existing gRPC code
Getting Started:
  • Have a professional Helius plan
  • Read the documentation
  • Open your dashboard and click LaserStream
LaserStream-powered WebSocket streaming coming soon!

LaserStream Documentation

Get started with LaserStream

LaserStream gRPC Guide

Learn about LaserStream gRPC implementation
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May 2025

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Staked Transactions Are the New Default

What’s Changed:
  • Staked Connections Default: Transactions sent through Helius now automatically use staked connections by default, providing you with the highest transaction landing rates and optimizing for speed and reliability. No code changes required.
  • Pricing Update: Staked connection pricing decreased from 50 to 1 credit per transaction, making it more cost-effective to use our premium transaction infrastructure.
Endpoint Changes:
  • Staked Endpoint: The dedicated staked endpoint (staked.helius-rpc.com) is being phased out in favor of the regular endpoint which now uses staked connections by default. You can continue using the staked endpoint for now, but we recommend switching to the regular endpoint (mainnet.helius-rpc.com) for the best experience.
Alternative Options:
  • Unstaked Connections: To continue using unstaked connections (1 credit per call), use https://unstaked.helius-rpc.com. Please note that unstaked connections may not be reliable during periods of network congestion.

Smart Transactions Guide

Learn more about our transaction optimization features

Staked Connections

Understanding staked vs unstaked connections
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April 2025

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Massive RPC Performance Improvements

Big news: We’ve reduced latency on all Solana account-based RPC calls by up to 95%!p95 improvements:Steps to use it: Nothing! If you use a shared and paid Helius subscription (i.e., not dedicated nodes), you get automatic access.What this means for you:
  • Faster dApp loading times: Account data fetches nearly instantly
  • Better user experience: Reduced waiting times for balance checks and token account queries
  • More efficient development: Faster iteration cycles when building and testing
  • Improved scalability: Handle more concurrent requests with the same infrastructure

RPC Optimization Techniques

Learn how to optimize your RPC usage

All RPC Methods

Explore all available RPC endpoints
Have questions about any of these changes? Contact our support team at support@helius.xyz or reach out in our Discord community.