What is Flume?
Flume is a low-latency transaction sending gateway on Solana. Our service delivers Solana transactions directly to validator leaders through SWQoS-enabled, stake-prioritized connectivity, giving latency-sensitive participants a higher-priority path during normal and congested network conditions.
Built for demanding real-time use cases like MEV arbitrage, sniping, HFT, and market making, it combines a global private network, dynamic leader-aware routing, optimized peer-to-validator access, and a low-overhead proprietary protocol to minimize propagation delays and improve execution reliability for high-frequency transaction flows.
Getting Started With Flume
Public mainnet endpoints
- http://mainnet.flume.fi:8898
- https://mainnet.flume.fi:8899
No API key is required for public endpoints.
To submit transactions to Flume, use Solana RPC’s sendTransaction format:
Each transaction must include a plain, top-level SOL transfer instruction to one of our tip accounts. The tip account must not be stored in an Address Lookup Table (ALT).
The minimum tip is 0.0001 SOL (100,000 lamports). Incoming transactions are prioritized based on tip amount, so higher tips receive higher priority and land faster.
Tip accounts:
F1UmeXErjRcdRxVj9JBCpipiVBU61GCb985uc1xtn43U
F1uMExkYXiGbEwatAi3dzK3jZvFhUzP32QuP66tc1pFb
F1UMEXBrEDDZECpAxaSVWfnVjfCfiTgCmYqU5mYGw9S7
F1uMexfUaezvhKoZgGfYmTFWaLgD9DdrvKRakKZizivQ
F1UMExwKaQqgxuSZAVWBAgLRKJnmn41zaaXFPxMPaE7b
F1UmexbxvThA6q3XYoV6zA5Yx9D3UaoscK2MWzsFyJx4
F1UmeXhXSPLCswuiKZYM2GFCzvWJsFP95KDEajcirP1J
F1UMeXyXSJjNgY2cwuZVWJWWA4jpLKiJmvB6G7cxjwub
Optimization Tips
- Prefer the HTTP endpoint, since our endpoints don’t require authentication and transactions are public.
- Use persistent HTTP connections with keep-alive and connection pooling to reduce latency.
- Use base64 encoding, which is default and reduces decoding time for transaction data.
- Add a priority fee by setting ComputeUnitPrice via ComputeBudgetInstruction to improve validator scheduling priority.
- Include a sufficient tip, as higher tips receive higher priority and land faster.