https://bsc-builder-eu.darwinbuilder.xyz/

{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "eth_sendBundle",
    "params": [
      {
        txs,               // Array[String], A list of signed transactions to execute in an atomic bundle
        blockNumber,       // String, a hex encoded block number for which this bundle is valid on
        minTimestamp,      // (Optional) Number, the minimum timestamp for which this bundle is valid, in seconds since the unix epoch
        maxTimestamp,      // (Optional) Number, the maximum timestamp for which this bundle is valid, in seconds since the unix epoch
        revertingTxHashes  // (Optional) Array[String], A list of tx hashes that are allowed to revert
      }
    ]
}

        {
    "jsonrpc": "2.0",
    "id": 1,
    "method": "eth_sendBundle",
    "params": [
        {
            "txs": [
                "0x...aa",
                "0x...bb"
            ],
            "blockNumber": "0xb63dcd",
            "minTimestamp": 0,
            "maxTimestamp": 1615920932
        }
    ]
}