BlockRazor’s Block Builder is a professional BSC block-building service built on the Proposer-Builder Separation (PBS) architecture. Deployed across multiple geographic regions, the Block Builder maintains low-latency communication channels to validators and continuously runs multiple block-construction algorithms to maximize block value. With a historical cumulative block production rate of 37%—the highest of any builder on BSC—BlockRazor gives searchers, trading bots, DEXs, and quantitative systems a decisive edge for on-chain execution.Documentation Index
Fetch the complete documentation index at: https://mintlify.com/BlockRazorinc/docs_en/llms.txt
Use this file to discover all available pages before exploring further.
What Is PBS and Why Does It Matter?
Proposer-Builder Separation (PBS) decouples the roles of the entity that proposes a block (the validator) from the entity that builds it (the builder). Builders compete to assemble the most valuable block possible—ordering, selecting, and including transactions to maximize fees and MEV. The winning block header is then forwarded to the validator for proposal to the network. This model benefits every participant in the ecosystem:- Searchers & Trading Bots can submit bundles and private transactions directly to a trusted builder, guaranteeing atomic execution and protection from front-running.
- Validators receive higher block rewards because competitive builders drive up block value.
- End Users gain MEV protection through private transaction routing that never exposes orders to the public mempool.
Track BlockRazor’s real-time block production rate on the official BNB Chain MEV dashboard: https://dune.com/bnbchain/bnb-smart-chain-mev-stats
BlockRazor Block Builder at a Glance
37% Block Production Rate
Historical cumulative rate, ranked #1 on BSC. BlockRazor builders win more blocks than any other builder on the chain.
Multi-Region Deployment
Infrastructure nodes are co-located close to validator clusters worldwide to minimize propagation latency.
Multi-Algorithm Construction
Multiple ordering and selection algorithms run simultaneously, ensuring blocks are always competitively valuable.
Free Access for New Users
New registered users get free access to
eth_sendBundle and eth_sendPrivateTransaction with no submission limits.Available Operations
The Block Builder exposes six core operations. Use them individually or combine them in your integration workflow.Send Bundle
Submit an ordered batch of signed transactions to the Block Builder for atomic inclusion in a target block.
Send Private Transaction
Route a single transaction privately through the Block Builder, bypassing the public mempool entirely.
Call Bundle
Simulate a bundle against a specific block state without submitting it—validate profitability before going live.
Trace Bundle
Retrieve detailed execution traces for a previously submitted bundle to debug ordering and gas usage.
Fast Submit
Submit transactions with reduced latency and higher stability by bypassing the standard relay path.
Dedicate Connection
Establish a private, reserved channel to Block Builder infrastructure for maximum throughput and priority routing.
Access & Pricing
BlockRazor structures Block Builder access across two tiers:Free — New Registered Users
All new registered users can immediately send bundles and private transactions to the Block Builder on BSC at no cost:| Method | Limit |
|---|---|
eth_sendBundle | No limit |
eth_sendPrivateTransaction | No limit |
Subscription — BSC Package ($1,250 / month)
The BSC Package bundles advanced Block Builder features with high-performance data streams at a discounted combined price:| Service | Description |
|---|---|
| Call Bundle | Simulate bundles before submission |
| Fast Submit | Lower-latency transaction submission |
| Public Mempool | High-performance pending transaction stream |
| Block Stream | Low-latency confirmed block data |
| Node Stream | Real-time synchronized world state |
| Tx Trace | Transaction propagation path monitoring |
Subscription — Individual Services
| Service | Price |
|---|---|
Bundle Tracing & Explorer (eth_traceBundle) | $1,500 / month |
| Dedicated Channel | $1,000 / month |