Pro
The block stream and raw transactions, served from us-east-2.
$3,000 a month
- Each block, as it completes
- Raw transactions: generally faster than blocks, not always
- Submit: 10 transactions per second, with bursts and priority
Robinhood Chain sequencer feed, delivered first.
FirstLight serves the Robinhood Chain sequencer feed with a median lead of +2.4 ms over the fastest private provider in a fixed benchmark and +76.6 ms over a typical provider, measured on every block and drawn live.
Median lead over
Lead over each live feed, per block, last 60 seconds: one recorded minute,
- Typical provider waiting
Left and right arrow keys hold the paper and read one block at a time, Home and End the oldest and newest on it; Escape lets the paper run on.
Live lead over the typical provider
- Mean
- +92.1ms
- average lead over every block
- p90
- +131.6ms
- 1 block in 10 led by more than this
- p99
- +379.3ms
- 1 block in 100 led by more than this
- p99.9
- +926.2ms
- 1 block in 1,000 led by more than this
- Max
- +962.4ms
- largest lead measured
Take the lead on Robinhood Chain
Enterprise
Everything in Pro, at your scale.
Priced by usage
- Submit scaled to your demand
- Colocation in our placement group
- Private fibre: 50 to 100 ms faster round trips to Europe and Asia
- A fast post-sim transaction log feed
One line in your node, nothing else changes
Sign up for a Basic keyThe block stream from Virginia, one connection.
Match each block with your current feedBy block hash, on your own clock.
On Pro, point your node at FirstLightOne flag; the rest of your configuration stays.
On Pro: connect in one line
--node.feed.input.url
wss://blocks.first-light.stream/{KEY} The whole distribution, not a best case
| Source | Median | Mean | p90 | p99 | p99.9 | Max | FL wins |
|---|---|---|---|---|---|---|---|
| Fastest private providerbenchmark | +2.4 ms | +2.9 ms | +6.7 ms | +8.9 ms | +15.1 ms | +584.1 ms | 98.95 % |
| Typical providerlive, last 10 min | +76.6 ms | +92.1 ms | +131.6 ms | +379.3 ms | +926.2 ms | +962.4 ms | 100.00 % |
Scroll the table sideways for the remaining columns.
Distribution, typical provider
FL wins: the share of blocks FirstLight delivered before the other feed.
The distribution counts every measured block by its lead, on a logarithmic scale; the left bin holds the blocks the other feed won or tied.
Questions, answered
What is FirstLight?
A Robinhood Chain sequencer feed: the sequencer's messages as a standard Arbitrum Nitro feed, a transactions stream and a headers stream, ahead of the feeds it is measured against.
How is the lead measured?
Per block: the other feed's arrival minus FirstLight's, both received by one host and stamped by one clock. Blocks are matched by number and hash. The method is in the measurement docs.
Does FirstLight change ordering or inclusion?
No. It changes when you learn what the sequencer did, not how the sequencer orders or includes transactions.
What does the Basic plan include?
The raw block stream from Virginia, with a key that you get when you sign up with your email: one connection, from one IP address, for a year, so you can compare our timing with your own feed. A Basic key can submit 1 transaction a second, on a low-priority path. The dashboard shows the Basic stream now and the status of your key. Basic is $500 a month, free in the beta.
How do I connect a node?
One flag, --node.feed.input.url wss://blocks.first-light.stream/{KEY}. See the feed docs.
Can I send transactions through FirstLight?
Yes, on every plan: FirstLight Submit takes eth_sendRawTransaction at https://submit.first-light.stream/{KEY}. Basic sends 1 transaction a second, on a low-priority path. Pro sends 10 a second, with bursts, at a higher priority. Enterprise scales to your demand. See the Submit docs.
Can I colocate?
On Enterprise: your instance runs in our placement group in AWS Ohio (us-east-2) and reads the feed over private peering. See the colocation docs.
Talk to the operator
Direct on Telegram. No form, no list.
Or write to hello@first-light.stream