How P2P.org Built a Solana Transaction Sender for Execution-Critical Teams

Solana processes over 162 million transactions daily at slot times averaging 390 milliseconds. For most users, that speed is more than sufficient. For trading firms, arbitrage bots, and liquidation engines, it is barely enough margin to work with.

The difference between landing a transaction in slot 0 and landing it in slot 2 is not a rounding error. It is the difference between a profitable execution and a missed opportunity with fees already paid. On Solana, landing late is not free. Priority fees paid to win a slot are still charged when the transaction arrives after the opportunity is gone.

This is the problem that P2P.org built Syncro Sender to solve.

The real bottleneck is not Solana. It is the path to the leader.

Most teams submitting transactions to Solana are using public RPC endpoints. These are designed for accessibility and general use, not for execution-critical workflows. They share bandwidth across thousands of concurrent users, offer no prioritization for time-sensitive transactions, and route through a constrained set of paths with no guarantee of directness or delivery speed.

Research found that Stake-Weighted Quality of Service is the most effective mechanism for reducing transaction landing latency across all transaction types, outperforming both priority fees and Jito tips. Standard public RPC endpoints, those not peered with a staked validator, cannot access SWQoS priority bandwidth. They compete for the remaining approximately 20% of leader capacity alongside every other unstaked connection on the network.

The result is structural: teams relying on public RPC are competing for the remaining 20% of available bandwidth, regardless of how much they pay in priority fees. Fees influence ordering after a transaction arrives. They do nothing to improve the probability that it arrives at all.

This is not an API problem. It is a network design problem.

What makes Syncro Sender different from other Solana transaction senders

Syncro Sender is a Solana transaction sender built on P2P.org‘s validator infrastructure, designed specifically for execution-critical workflows. Several architectural choices differentiate it from standard RPC submission and from competing sender solutions.

Validator-level routing through SWQoS connections. Syncro Sender routes transactions through P2P.org‘s staked validator infrastructure, giving transactions access to priority bandwidth lanes reserved for staked connections. This happens at the network layer, before fee-based ordering comes into play. The advantage is most pronounced during congestion, which is precisely when it matters most for trading and liquidation workflows.

Multi-path delivery to current and upcoming leaders. Rather than relying on a single submission path, Syncro Sender sends transactions simultaneously through multiple routes: directly to the current block leader, toward upcoming leaders identified through the leader schedule, and through staked validator connections in parallel. Whichever path reaches the leader first determines the outcome. The others become redundant. Independent 2025 benchmarks of Solana transaction endpoints confirmed that without SWQoS and well-placed infrastructure, even high-fee transactions consistently land in the seconds range. Multi-path delivery through staked connections pushes teams into sub-second territory, which already places them ahead of the majority of network traffic.

Global infrastructure across six regions. Syncro Sender endpoints are deployed in Amsterdam, Frankfurt, New York, London, Tokyo, and Singapore. Because the Solana leader schedule rotates continuously, consistent performance across different slot leaders requires geographic coverage, not proximity to a single location. The endpoint closest to the active validator cluster handles each submission, minimizing network hops and reducing latency at every step.

Drop-in integration with no logic changes. Syncro Sender works as an additional submission endpoint alongside existing infrastructure. Teams do not need to rebuild their transaction flow, change their signing logic, or replace their current providers. The only required change is adding a tip instruction to the transaction. Most teams run Syncro Sender in parallel with their current setup, compare landing performance on real transaction flow, and evaluate results directly.

Solana transaction landing performance in production

Syncro Sender reports a 99.2% transaction inclusion rate and a 99% slot 0 to 1 landing rate across production traffic from trading firms and searchers. Average latency sits at 1.2 slots.

For context, a July 2025 peer-reviewed study published in ACM Proceedings on Software Engineering, analyzing over 1.5 billion failed Solana transactions, found that automated accounts experience a transaction failure rate of 58.43%. For execution-critical teams, the gap between network-average performance and purpose-built infrastructure is where execution outcomes are decided.

Built on P2P.org validator infrastructure

P2P.org is one of the largest non-custodial staking providers in the industry, with over 10 billion dollars in assets under validation across 40 blockchain networks. Syncro Sender is built directly on that validator infrastructure, which means the staked connections it routes through are not sourced from third parties. They are P2P.org‘s own validator relationships, maintained and operated as part of the same infrastructure stack that secures billions in staked assets.

That infrastructure depth is what enables the SWQoS priority routing and global endpoint coverage that define Syncro Sender’s performance profile.

Getting started

Syncro Sender is available via a public endpoint for testing with no API key required, and via a dedicated private endpoint for production use cases. The public endpoint supports up to 1 request per second at a tip of 0.0001 SOL per landed transaction. The dedicated endpoint supports up to 50 requests per second with full RPC method support.

Teams looking to understand how Solana transaction landing works before integrating can read the full technical breakdown in P2P.org’s Solana transaction landing explainer. Full integration documentation, including endpoint details, tip configuration, and code examples, is available in the Syncro Sender documentation.

For teams where execution is the edge, routing is where that edge is built or lost.

Disclaimer: This is a sponsored post. CryptoSlate does not endorse any of the projects mentioned in this article. Investors are encouraged to perform necessary due diligence.