# Upcoming relay data API update: adding \`timestamp\_ms\` to \`builder\_blocks\_received\`

**URL:** https://collective.flashbots.net/t/upcoming-relay-data-api-update-adding-timestamp-ms-to-builder-blocks-received/610
**Category:** Relays
**Created:** [October 21, 2022, 11:21am UTC](https://collective.flashbots.net/t/upcoming-relay-data-api-update-adding-timestamp-ms-to-builder-blocks-received/610 "2022-10-21T11:21:43Z")
**Posts on this page:** 1
**Page:** 1

<div class="post-metadata">

### Author: ![metachris](https://collective.flashbots.net/user_avatar/collective.flashbots.net/metachris/32/6_2.png) [@metachris](https://collective.flashbots.net/u/metachris)
#### Post date: [October 21, 2022, 11:21am UTC](https://collective.flashbots.net/t/upcoming-relay-data-api-update-adding-timestamp-ms-to-builder-blocks-received/610/1 "2022-10-21T11:21:43Z")

</div>

Bids in the `builder_blocks_received` data API should include timestamps in milliseconds. Rather than breaking the previous unix second timestamp, we’ll add a new field `timestamp_ms`:

```json
{
    "slot": "4153442",
    "parent_hash": "0x167c7f7c7b8f402a8f6a6e3364b2ce7f94e2e9322daa171995a9653f60628467",
    "block_hash": "0x52e8986bb0bb7a3d0985c109d00bae73ab490371cce46733391410fc6c113a60",
    "builder_pubkey": "0xa8575cb8de4a336109f2587145a8a2215bbf9e7124d8bba98bb2069f7a83285d6a2185be3a55ffbc82847cc574c01ebe",
    "proposer_pubkey": "0xb5d69d1a776cd741ad9ee8c4f8487923b422100b4d9be3f0f2e270d2385b1ca1b284c73cb38137cb287305e99a7473e0",
    "proposer_fee_recipient": "0x0000000000000000000000000000000000011111",
    "gas_limit": "30000000",
    "gas_used": "29966286",
    "value": "1072864972455703463",
    "num_tx": "110",
    "block_number": "7807902",
    "timestamp": "1666349304",
    "timestamp_ms": "1666349304804"
}

```

The PR: [add millisecond timestamp to builder bids by metachris · Pull Request #212 · flashbots/mev-boost-relay · GitHub](https://github.com/flashbots/mev-boost-relay/pull/212)

Deployed to Goerli and Sepolia:

- [https://boost-relay-sepolia.flashbots.net/relay/v1/data/bidtraces/builder\_blocks\_received](https://boost-relay-sepolia.flashbots.net/relay/v1/data/bidtraces/builder_blocks_received)
- [https://boost-relay-goerli.flashbots.net/relay/v1/data/bidtraces/builder\_blocks\_received](https://boost-relay-goerli.flashbots.net/relay/v1/data/bidtraces/builder_blocks_received)