Transaction & Fee APIs
Sender FAQs
Get answers to the most common questions about Helius Sender including functionality, configuration, and rate limits
Using Sender
What is Sender and why is it faster than other transaction sending services?
What is Sender and why is it faster than other transaction sending services?
Sender is a specialized service for ultra-low latency transaction submission. It optimizes transaction latency by sending to both Solana validators and Jito simultaneously, providing multiple pathways for your transactions to be included in blocks.With seven regional endpoints, typical land-time is ≤ 1.5 slots.
Can I get a higher Sender API limit than 6 transactions per second (TPS)?
Can I get a higher Sender API limit than 6 transactions per second (TPS)?
Yes! While the standard limit is 6 TPS per region, you can request higher limits. Contact support to discuss custom rate limits based on your specific use case requirements. Higher limits are available for applications with demonstrated need for increased throughput.
How do I set tips and priority fees with Sender?
How do I set tips and priority fees with Sender?
All transactions sent through Sender must include both tips and priority fees for optimal performance:Tips: Minimum 0.001 SOL is required for Jito auction participation. Tips enable access to Jito’s MEV infrastructure and auction-based transaction inclusion.Priority Fees: Use
ComputeBudgetProgram.setComputeUnitPrice to prioritize your transaction in the validator queue. Use the Priority Fee API for real-time fee recommendations.Why both are required: Tips give you access to Jito’s MEV auction, while priority fees improve your transaction’s priority with validators—together they maximize inclusion probability.See the Sender documentation for detailed code examples and implementation guidelines.