Are you an LLM? Read llms.txt for a summary of the docs, or llms-full.txt for the full context.
Skip to content

Getting Started

Bombora is an Ethereum block builder by Sigma Prime. Submit bundles and private transactions via the JSON-RPC endpoint.

Coinbase

Ethereum Mainnet blocks built by Bombora use the following coinbase address:

0x954e078bb847ef3d361eb0da7da1ff9c0653fcb3Click to copy

Endpoints

NetworkRegionEndpoint
Ethereum MainnetGlobalhttps://rpc.bombora.build
Ethereum MainnetEUhttps://eu-rpc.bombora.build
Hoodi TestnetGlobalhttps://rpc-hoodi.bombora.build
Hoodi TestnetEUhttps://eu-rpc-hoodi.bombora.build

More regions coming soon. Global endpoints route to the nearest available region.

Authentication

No authentication is required. The X-Flashbots-Signature header is accepted but does not affect priority.

Privacy

Bundles and private transactions submitted to Bombora are not broadcast to the public mempool.

Supported Methods

MethodDescription
eth_sendBundleSubmit an ordered bundle with explicit revert/drop controls
eth_cancelBundleCancel a pending bundle via its replacement UUID
eth_sendRawTransactionSubmit a single private transaction (raw)
eth_sendPrivateTransactionSubmit a private transaction with a block number ceiling
eth_cancelPrivateTransactionCancel a pending private transaction

Quick Example

curl -X POST https://rpc.bombora.build \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "eth_sendRawTransaction",
    "params": ["0x...signed-tx-bytes..."]
  }'