Show HN: Spindle – a full-featured, type-safe web framework for OCaml 5
0 comments
- Points60
- Comments8
–Rank now
#16Peak rank
2Days on list
41Score · 7d
Nov 7, 2026First seen
Rank · 7 days
On Hacker News
Spindle is a multicore-by-design, eio-native web framework for modern OCaml. Its central idea is to provide an expressive, type-driven API and derive the rest: codecs, request validation, OpenAPI spec and frontend schemas (Zod and Melange). This keeps contracts in sync between server and client without maintaining separate definitions. The framework includes an RFC-strict HTTP server, composable dependencies, WebSockets, SSE and high-level primitives for building MCP servers. It also provides…
- Points
- 60
- Comments
- 8
- Submitted by
- zaiev
- Posted
- Nov 5, 2026
- Site
- github.com
Story details from Hacker News ↗ · linked article on github.com.
Trending history
Show HN: Spindle – a full-featured, type-safe web framework for OCaml 5 was first seen on Hacker News · Front page on Nov 7, 2026. Since then it has appeared in 53 checks on 2 different days, across 2 lists (Hacker News · Front page, Hacker News · Show HN · this week). Its best position was #16 of 30, reached on Nov 7, 18:24 UTC. It dropped off the list after Nov 8, 15:50 UTC.
Rank history
Position on Hacker News · Front page at every check (lower is better).
Last 14 days
Best rank per day (UTC).
16
Oct 26today
Metric history
Platform metric as reported by Hacker News.
Where it trended
| List | Best | Days | Checks | Last seen |
|---|---|---|---|---|
| Hacker News · Front page | #16 | 1 | 29 | |
| Hacker News · Show HN · this week | #22 | 2 | 24 |
From the discussion
A few top-level comments from Hacker News, shortened. Read the full thread on Hacker News.
Nice work! Just looking through the Eio code, you may want to use the capability restrictions more. For example, in the static file serving code, you can use `Eio.Path.open_subtree` which will use Linux fd sandboxing to prevent accidental symlink escapes or other ways to leave that subtree:…
Will keep an eye on this project, love me some Ocaml! Do you have an example of it deployed and in use? Don’t like the “fresh off the AI block” feeling of the website but could be a bit more confident if I could see it used in the actual wild!
Cool to see some Lisp in this OCaml project: Add to your bin/dune: (executable (name main) (libraries spindle eio_main) (preprocess (pps ppx_wiretype)))**
Featured in
Archived daily, weekly and monthly lists that include this entry.
Hacker News 1 day, best #16
Show HN Weekly 2 days, best #22
Questions
Is Show HN: Spindle – a full-featured, type-safe web framework for OCaml 5 trending on Hacker News right now?
Not at the moment. It was last on the list on Nov 8, 15:50 UTC, after 2 days of trending.
What is the highest rank Show HN: Spindle – a full-featured, type-safe web framework for OCaml 5 reached?
#16 on Hacker News · Front page, on Nov 7, 18:24 UTC. Trendoday checks this list every 15 minutes.
How long has Show HN: Spindle – a full-featured, type-safe web framework for OCaml 5 been trending?
It was first seen on Nov 7, 2026 and has been on the list on 2 days (53 checks) since.
How much discussion did it get on Hacker News?
60 points and 8 comments; submitted by zaiev on Nov 5, 2026.