> For the complete documentation index, see [llms.txt](https://docs.circular.fi/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.circular.fi/api/fast.md).

# Fast

**Land transactions faster. Capture more value.**

Fast is Circular's transaction landing infrastructure built for latency-sensitive applications on **Solana**.

Send a transaction once. Fast simultaneously broadcasts it across a global network of **Solana nodes, dedicated SWQoS connections, UDP routes, Jito, Harmonic, Rakurai, and private validator deals** — automatically racing every available path to maximize your chances of landing as early as possible.

For strategies where every millisecond matters, Fast is designed with one objective:

#### **Get your transaction landed — ideally in 0-slot.**

Fast's globally distributed infrastructure continuously routes transactions through multiple independent landing channels at the same time, reducing reliance on any single provider or propagation path.

> **One transaction. Multiple routes. One goal: land first.**

<figure><img src="/files/OPwH3hf3A8l9fPOINejs" alt=""><figcaption></figcaption></figure>

### More Than Transaction Landing

Fast doesn't stop when your transaction lands.

Once your transaction has been included on-chain, Fast can identify **arbitrage and backrun opportunities created after your transaction** and monetize them without modifying, delaying, or interfering with the original transaction.

Part of the value captured can then be **returned to you as cashback**.

#### **Land first. Monetize after.**

Your transaction always remains the priority:

* **No transaction modification**
* **No additional execution risk**
* **No dependency on the backrun to land your transaction**
* **Monetization happens only after your transaction has landed**
* **Generated value can be shared back with you**

This means Fast can turn transaction flow that would normally generate value for external searchers into an additional source of revenue for your application or strategy.

### Built for Performance-Critical Solana Applications

Fast is designed for teams and traders where transaction ordering, latency, and landing reliability directly impact performance.

* **Trading & Arbitrage Bots** — Reduce propagation latency and compete for the earliest possible execution.
* **High-Frequency Traders** — Broadcast through multiple independent channels simultaneously instead of relying on a single RPC or block engine.
* **DeFi Applications** — Improve transaction landing reliability while creating the opportunity to return additional value to users.
* **Liquidators** — React to liquidation opportunities with infrastructure optimized for fast inclusion.
* **Sniping & Launch Bots** — Compete in highly latency-sensitive environments where a single slot can determine the outcome.
* **Jito & Block Engine Users** — Combine block-engine routing with SWQoS, UDP, standard Solana infrastructure, and additional private channels.
* **Wallets & Trading Interfaces** — Improve execution quality while potentially generating cashback from eligible transaction flow.

### One Integration. Every Landing Path.

Instead of building and maintaining relationships, infrastructure, and routing logic across multiple transaction providers, Fast gives you a **single transaction endpoint** connected to multiple landing channels.

Fast handles the propagation race.

**You focus on your strategy. We focus on getting it landed.**