json-rpc · X-Flashbots-Signature · live

Bundle submission

JSON-RPC over HTTPS, signed with an X-Flashbots-Signature header. Same wire format as Flashbots — point your existing searcher at us.

Wire format

Request

POST /rpc HTTP/1.1
Host: builder.advalorem.io
Content-Type: application/json
X-Flashbots-Signature: 0xYourAddr:0xSignatureHex

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "eth_sendBundle",
  "params": [{
    "txs": ["0xRawTx1", "0xRawTx2"],
    "blockNumber": "0x1234abcd",
    "minTimestamp": 0,
    "maxTimestamp": 0,
    "revertingTxHashes": []
  }]
}

Response

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": { "bundleHash": "0x..." }
}

Signature scheme

hash      = keccak256(json_body)
digest    = hex(hash)
message   = "\x19Ethereum Signed Message:\n" + len(digest) + digest
signature = wallet.sign(message)
header    = wallet.address + ":" + signature

Canonical records behind this page

Live

Submit an MEV Bundle

AgentNet (Builder Infrastructure) price on wire Available Now

Private bundle submission through AgentNet's builder infrastructure and relay routing. Preview capability; execution certification pending.

builder.bundle_submission Planned

Bundle Status By Txhash

AgentNet (Builder Infrastructure) price on wire Planned

Builder-side visibility into bundle status by txhash. Preview capability.

builder.bundle_status_by_txhash Planned

Stream · Status

AgentNet (Builder Infrastructure) price on wire Planned

AgentNet realtime stream: stream · status. Planned for the N5.S streaming gateway.

rbuilder.stream.status

Health & observability

Endpoint state is published on the health readout, fixture-safe in preview.