MEVBlockValue

MEVBlockValue feed provides information of the block at next slot number, allowing block builders to know the latest best block received by a MEV relay.

Service available via Cloud API only.

Stream Endpoint

• Method: MEVBlockValue

• Endpoint: wss://mev-eth.blxrbdn.com/ws

Parameters

Key	Description	Values
include	Fields to include in the MEV block value stream.	slot_number,block_number,block_hash,block_value,proposer_fee_recipient,gas_used,builder_pubkey,parent_hash,timestamp_ms,relay_type [Default: all]
regions	Restrict delivery to specific originating region(s) (case-insensitive). Omit, or pass "all", to receive every region (default, unfiltered).	e.g. frankfurt, virginia, tokyo — [Default: all]

Examples

Request

wscat

wscat -c wss://mev-eth.blxrbdn.com/ws --header "Authorization: <YOUR-AUTHORIZATION-HEADER>" --no-check
> {"id": 1, "method": "subscribe", "params": ["MEVBlockValue", {"include": []}]}

To only receive updates from specific region(s), pass regions:

wscat

wscat -c wss://mev-eth.blxrbdn.com/ws --header "Authorization: <YOUR-AUTHORIZATION-HEADER>" --no-check
> {"id": 1, "method": "subscribe", "params": ["MEVBlockValue", {"include": [], "regions": ["frankfurt"]}]}

Response

Event

{
  "id": 1,
  "method": "subscribe",
  "params": {
    "subscription": "34f9c19d-1c67-4358-a96d-e810fe878e4e",
    "result": {
      "relayType": "regulated",
      "slotNumber": 5316618,
      "blockNumber": 16150006,
      "blockHash": "0x1614b511fb8125f12ebc446d53317baa0a503ce3bb9c2b5f55ff149459cf686f",
      "blockValue": 39019045357810515,
      "proposerFeeRecipient": "0x388c818ca8b9251b393131c08a736a67ccb19297",
      "gasUsed": 12121805,
      "builderPubkey": "0x965a05a1ba338f4bbbb97407d70659f4cea2146d83ac5da6c2f3de824713c927dcba706f35322d65764912e7756103e2",
      "parentHash": "0xee69ea2803cae1616a6cda85bf19788550ef2f10a6b7cda4ed6a697ca8ed5003",
      "timestampMs": 1670623433765,
      "region": "frankfurt",
      "optimisticSubmission": true
    }
  }
}

Result Field	Description
slotNumber	Slot number of the latest best block.
blockNumber	Block number of the latest best block.
blockHash	Block hash of the latest best block.
blockValue	Block value (proposer payout amount) in wei of the latest best block.
proposerFeeRecipient	Proposer fee recipient address.
gasUsed	Block gas used value.
builderPubkey	Public key of the builder that produced the block.
parentHash	Block hash of the parent block.
timestampMs	Block submission timestamp in milliseconds.
relayType	The type of relay that received best block from builders. Possible values are: max-profit, regulated . Please see MEV Relay for more information about relay types.
region	Originating region of the MEV relay that received this block value update.
optimisticSubmission	Whether the block was submitted optimistically to the relay.