Neon Zero A latency-to-leader driven sendTransaction on/off gate
An opt-in sendTransaction gate. It passes sendTransaction to the network only when the leader is close, so a higher percentage of what you send lands in slot+0.
How It Works
Follow the Leader
The Solana leader moves to a different validator every 4 slots, all around the globe. Sometimes it is close to one of our RPCs, sometimes far away. The best time to send, and land in slot+0, is when the leader is close.
A Simple Gate
When the leader is close to the region you're sending through and its slot has just begun, the gate opens and your transactions go through. When the leader is far away, the gate closes and your transactions are blackholed, never sent to the network.
Skip the Sends That Lose
Only about 25% of your sends get through, but ~77% of those land in slot+0, versus about ~46% on the non-gated staked RPC path. Blackholed sends cost no gas. You still get a signature back, so your clients and bots behave as if nothing changed.
Built for Trading Bots
Designed for automated traders that send many attempts, like arbitrage bots. Keep sending as you do now. Neon Zero lets through the sends most likely to land in slot+0, where the profit is.
Slot+0 Landing Success
Non-staked RPCEvery send sent via the network
~39%
Staked RPCEvery send sent via our staked provider
~46%
Neon ZeroAbout 25% of your sends allowed through when leaders are close
~77%
Share of total transactions passed that land in slot+0. Live Frankfurt traffic, October 2026.
Endpoints
https://neon-rpc-frankfurt.constant-k.com/?api-key=YOUR_API_KEY
https://neon-rpc-amsterdam.constant-k.com/?api-key=YOUR_API_KEY
https://neon-rpc-newyork.constant-k.com/?api-key=YOUR_API_KEY
Use your Nexus API key the same way as on our other RPC URLs: in the ?api-key= parameter or the x-api-key header.Good to Know
- Opt-in only. This is a new URL for each region. Your current endpoint URLs stay the same.
- Nexus Tier subscription required.
- When the gate is closed, the transaction is not sent. The reply carries a generated signature, which will not confirm.