Get StartedSender-Agnostic Transaction Relay
Leader-proximity-aware routing across Nozomi, Helius, 0slot, and custom senders. Slipstream selects the optimal sender based on real-time leader proximity.
Global Worker Network
4 regions interconnected. Real-time worker status and leader latency.
What Slipstream Does
Leader Proximity Routing
Routes each transaction to the worker closest to the current slot leader. Each region measures real-time RTT to the active leader validator and transactions are forwarded through the lowest-latency path.
4-Protocol Fallback
QUIC (port 4433, primary) → gRPC (10000) → WebSocket (9000) → HTTP (9091). Automatic failover with configurable timeout per protocol.
Atomic Bundles
Submit 2–5 transactions as an atomic bundle (5 tokens / 0.00025 SOL). All-or-nothing execution with tip wallet support via get_senders().
TPU Direct Submission
Fire-and-forget UDP submission straight to the leader's TPU (2 tokens / 0.0001 SOL). No confirmation, no retry — absolute minimum latency.
5 Real-Time Streams
Leader hints, tip instructions, priority fees, latest blockhash, and slot updates — all streamed in real-time over your active connection.
Sender Agnostic
Automatically selects between Nozomi, Helius, 0slot, and custom senders per transaction based on leader proximity and network conditions.
How It Works
Connect via SDK
Your application connects to the nearest Slipstream worker using QUIC (preferred), gRPC, WebSocket, or HTTP. The SDK auto-discovers available regions and selects the optimal one.
Submit Transaction
Send a single transaction (1 token), atomic bundle (5 tokens), or TPU direct (2 tokens). Options include broadcast mode, deduplication, preferred sender, and retry configuration.
Proximity-Aware Routing
Slipstream identifies the current slot leader and routes your transaction to the worker with the lowest RTT to that leader. If the leader is in a US data center, the US East worker (~17ms RTT) handles it.
Sender Selection & Delivery
The worker selects the optimal sender (Nozomi, Helius, 0slot, or custom) based on the leader's identity and network conditions, then delivers your transaction. Confirmation is tracked and returned via your connection.
How Slipstream Compares
Slipstream combines intelligent sender selection with leader-proximity routing.
| Feature | Slipstream | Direct RPC | Jito |
|---|---|---|---|
| Leader RTT (US East) | <1ms | Varies (100ms+) | ~50–100ms |
| Sender Selection | Auto (proximity-aware) | Single endpoint | Jito only |
| Protocols | QUIC, gRPC, WS, HTTP | HTTP | gRPC, HTTP |
| Atomic Bundles | 2–5 tx (5 tokens) | ||
| TPU Direct (UDP) | 2 tokens | DIY only | |
| Real-Time Streams | 5 stream types | Limited | |
| Regions | 4 (dynamic discovery) | Single | Limited |
| Cost per TX | 0.00005 SOL (1 token) | RPC cost only | Tip-based |
One SDK, Three Languages
Install, connect, submit. Same API surface across Rust, TypeScript, and Python.
use allenhark_slipstream::*;
let config = Config::builder()
.api_key("sk_live_...")
.build()?;
let client = SlipstreamClient
::connect(config).await?;
let result = client
.submit_transaction(&tx)
.await?;
import { SlipstreamClient,
configBuilder }
from "@allenhark/slipstream";
const config = configBuilder()
.apiKey("sk_live_...").build();
const client = await
SlipstreamClient.connect(config);
const result = await
client.submitTransaction(tx);
from allenhark_slipstream import
SlipstreamClient, config_builder
config = config_builder()
.api_key("sk_live_...")
.build()
client = await
SlipstreamClient.connect(config)
result = await
client.submit_transaction(tx)
Pricing
Token-based billing. 1 token = 50,000 lamports = 0.00005 SOL. Deposit SOL and start sending.
Pro
- All 4 protocols
- Atomic bundles + TPU
- All 4 regions
- Priority routing
- Webhooks
Enterprise
- Volume discounts
- Dedicated workers
- Custom senders
- SLA guarantee
- Dedicated support
Frequently asked questions
What is Slipstream?
Slipstream is AllenHark's sender-agnostic Solana transaction relay. It routes transactions across multiple upstream senders (Nozomi, Helius, 0slot, AllenHark) based on real-time leader proximity, so your transaction always takes the fastest path to the current slot leader.
What protocols does Slipstream support?
Four: QUIC for lowest-latency direct TPU submission, gRPC for high-throughput streaming with flow control, WebSocket for persistent-connection use cases, and HTTP/JSON for simple integration. The same SDK selects the best protocol per region automatically.
What regions does Slipstream run in?
Four global regions — Frankfurt, Amsterdam, Chicago, and additional capacity added with Solana cluster growth. Leader RTT from US East is ~17ms; from Frankfurt to EU leaders it is under 1ms.
How is Slipstream billed?
Token-based pricing: 1 token = 50,000 lamports = 0.00005 SOL. A single transaction costs 1 token, a 2–5 transaction atomic bundle costs 5 tokens, a TPU direct submission costs 2 tokens, and an RPC proxy call costs 1 token. Free tier: 100 tokens per day.
How does Slipstream differ from Jito bundles?
Jito routes through a specific block engine and competes for bundle slots. Slipstream is sender-agnostic — it can route via Jito when Jito is the fastest path, or direct TPU/0-slot otherwise, selected per-transaction based on leader schedule. You get Jito when Jito wins and direct submission when it does not.
Scaling a private MEV relay on Slipstream
How a Frankfurt-based trading desk moved their searcher submissions onto Slipstream and reclaimed the slots they were losing to Jito-only routing.
Read the case studyReady to Route Smarter?
Start with the free tier — 100 tokens/day, no deposit required. Scale to millions of transactions across 4 regions with pay-as-you-go billing.
New to Solana streaming? Read the Yellowstone gRPC guide or compare AllenHark to Helius, QuickNode & Triton.
Related Infrastructure
Every service below is available on every AllenHark tier — stack what your workload needs.
Staked, dedicated RPC with priority sendTransaction and IP whitelist.
Same-slot account and transaction subscriptions over dedicated gRPC.
Raw UDP shred access — sees transactions before they land in a block.
0-slot transaction landing via private QUIC relay with MEV protection.
Bare-metal and VPS hosting in Frankfurt / Amsterdam / Chicago.
White-label validator under your brand — zero ops, maximum yield.
See full pricing on the pricing page, read the Solana gRPC guide, or compare AllenHark to Helius, QuickNode & Triton.