This currently applies to:
  • Ethereum mainnet
  • BNB Smart Chain mainnet

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How it works

  1. You construct and sign your transaction as usual and send it through our endpoint. This is sent as eth_sendRawTransaction.
  2. Instead of broadcasting to the global mempool, our proxy forwards it to the partner network for direct inclusion consideration by block builders.
  3. A builder includes your transaction in a block. Once confirmed, it appears on-chain as normal.
If you have the transaction hash, you can retrieve it from the private pool with the regular eth_getTransactionByHash but only through the same Chainstack node endpoint you used to submit the transaction. Once the transaction is in the block, you can retrieve it using all regular methods, of course:

eth_getTransactionByHash

eth_getTransactionReceipt

eth_getTransactionByBlockHashAndIndex

eth_getTransactionByBlockNumberAndIndex

and so on.

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Benefits

  • Reduced front-running risk — your transaction isn’t visible in the public mempool, minimizing the chance of adversary trades.
  • Reliable delivery — direct builder routes ensure predictable inclusion.

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Opting out

If you prefer the traditional public mempool route, you can disable private routing. Just switch MEV protection to off on the node details page.