What is the Robinhood Chain sequencer feed?
The sequencer feed at wss://feed.mainnet.chain.robinhood.com is a free, public WebSocket that pushes transactions the instant they are sequenced — before block inclusion. It is the lowest-latency signal available on the chain.
On a chain producing blocks roughly every 100 milliseconds, seeing a transaction at sequencing rather than at block publication is a meaningful edge for anyone trading, liquidating or hedging.
It is a raw Arbitrum Nitro feed, so consuming it means decoding Nitro messages rather than reading JSON-RPC responses. No commercial provider on this chain currently resells, normalizes or decodes it — the market polls RPC instead.
If you consume it directly, the obligation you take on is reconciliation: every sequenced message must eventually be matched to a block, marked as dropped if it never lands, or marked as reorged if it is reorganized out. Leaving a pre-confirmation unresolved is worse than not having one.