Introduction
0block is a latency-optimized Solana transaction landing service with stake-weighted QoS and same-slot inclusion.
0block is a latency-optimized Solana landing service built by NYX Labs. It provides a lightweight API for submitting transactions directly to Solana's network with sub-millisecond routing, stake-weighted QoS (SWQoS), and automatic prioritization through 0-block inclusion.
Who it's for
- Trading engines and bots that require fast, reliable transaction landing
- Infrastructure providers that want to bypass congested public RPCs
- Developers testing or deploying custom Solana workflows
How it works
0block is a submission egress — a JSON-RPC gate that sits in front of a staked upstream. On
every inbound sendTransaction it:
Verifies a tip
It confirms a tip instruction is present — a SystemProgram transfer to an allowlisted
0block tip account, at or above the minimum (0.001 SOL). Transactions without a qualifying tip
are rejected.
Forwards to a staked upstream
The raw transaction is forwarded verbatim to a staked validator/RPC, so it lands with prioritized routing and higher inclusion probability.
Relays the response
The upstream JSON-RPC response is relayed back to you unchanged.
A 2xx / result from 0block means your transaction was accepted for forwarding
(submission-acked) — not that it landed or was confirmed. On Solana, a transaction that
reverts rolls back its tip while still burning fees, so tip presence is never proof of
payment. Always confirm landing against a separate trusted RPC. See
Tracking your transactions for the full status lifecycle.
Next steps
- Quick Start — get an API key and send your first transaction.
- Send Transaction — the full submission contract.
- Dashboard & API Keys — self-serve account setup, key management, and per-transaction telemetry.