Quasar Builder
Quasar Builder provides an Ethereum JSON-RPC endpoint for submitting atomic bundles with timing, replacement, revert, and refund controls.
About this tool
Its eth_sendBundle method accepts signed transaction arrays and optional target-block, timestamp, allowed-revert, allowed-drop, replacement, and refund fields. The documentation also describes sponsored bundles for qualifying submissions and an end-of-block bundle method for pool-targeted execution.
The service is intended for Ethereum searchers, arbitrage strategies, and execution systems that need direct builder submission. A public endpoint is available without mandatory authentication, while optional authentication can be used as part of the provider's bundle-inclusion workflow.
Tool details
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