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OpenCiv3: Open-source, cross-platform reimagining of Civilization III

https://openciv3.org/
427•klaussilveira•6h ago•97 comments

The Waymo World Model

https://waymo.com/blog/2026/02/the-waymo-world-model-a-new-frontier-for-autonomous-driving-simula...
778•xnx•11h ago•472 comments

How we made geo joins 400× faster with H3 indexes

https://floedb.ai/blog/how-we-made-geo-joins-400-faster-with-h3-indexes
15•matheusalmeida•1d ago•0 comments

Show HN: Look Ma, No Linux: Shell, App Installer, Vi, Cc on ESP32-S3 / BreezyBox

https://github.com/valdanylchuk/breezydemo
145•isitcontent•6h ago•15 comments

Monty: A minimal, secure Python interpreter written in Rust for use by AI

https://github.com/pydantic/monty
135•dmpetrov•6h ago•58 comments

Dark Alley Mathematics

https://blog.szczepan.org/blog/three-points/
41•quibono•4d ago•3 comments

A century of hair samples proves leaded gas ban worked

https://arstechnica.com/science/2026/02/a-century-of-hair-samples-proves-leaded-gas-ban-worked/
74•jnord•3d ago•5 comments

Show HN: I spent 4 years building a UI design tool with only the features I use

https://vecti.com
249•vecti•8h ago•118 comments

Microsoft open-sources LiteBox, a security-focused library OS

https://github.com/microsoft/litebox
314•aktau•12h ago•155 comments

Show HN: If you lose your memory, how to regain access to your computer?

https://eljojo.github.io/rememory/
180•eljojo•9h ago•124 comments

Sheldon Brown's Bicycle Technical Info

https://www.sheldonbrown.com/
311•ostacke•12h ago•85 comments

Hackers (1995) Animated Experience

https://hackers-1995.vercel.app/
397•todsacerdoti•14h ago•217 comments

An Update on Heroku

https://www.heroku.com/blog/an-update-on-heroku/
325•lstoll•12h ago•233 comments

PC Floppy Copy Protection: Vault Prolok

https://martypc.blogspot.com/2024/09/pc-floppy-copy-protection-vault-prolok.html
14•kmm•4d ago•1 comments

Show HN: R3forth, a ColorForth-inspired language with a tiny VM

https://github.com/phreda4/r3
48•phreda4•5h ago•8 comments

I spent 5 years in DevOps – Solutions engineering gave me what I was missing

https://infisical.com/blog/devops-to-solutions-engineering
109•vmatsiiako•11h ago•34 comments

How to effectively write quality code with AI

https://heidenstedt.org/posts/2026/how-to-effectively-write-quality-code-with-ai/
187•i5heu•9h ago•131 comments

Understanding Neural Network, Visually

https://visualrambling.space/neural-network/
236•surprisetalk•3d ago•31 comments

I now assume that all ads on Apple news are scams

https://kirkville.com/i-now-assume-that-all-ads-on-apple-news-are-scams/
977•cdrnsf•15h ago•415 comments

Learning from context is harder than we thought

https://hy.tencent.com/research/100025?langVersion=en
144•limoce•3d ago•79 comments

Female Asian Elephant Calf Born at the Smithsonian National Zoo

https://www.si.edu/newsdesk/releases/female-asian-elephant-calf-born-smithsonians-national-zoo-an...
4•gmays•1h ago•0 comments

Introducing the Developer Knowledge API and MCP Server

https://developers.googleblog.com/introducing-the-developer-knowledge-api-and-mcp-server/
17•gfortaine•3h ago•2 comments

FORTH? Really!?

https://rescrv.net/w/2026/02/06/associative
41•rescrv•14h ago•17 comments

I'm going to cure my girlfriend's brain tumor

https://andrewjrod.substack.com/p/im-going-to-cure-my-girlfriends-brain
49•ray__•2h ago•11 comments

Evaluating and mitigating the growing risk of LLM-discovered 0-days

https://red.anthropic.com/2026/zero-days/
36•lebovic•1d ago•11 comments

Why I Joined OpenAI

https://www.brendangregg.com/blog/2026-02-07/why-i-joined-openai.html
56•SerCe•2h ago•45 comments

Show HN: Smooth CLI – Token-efficient browser for AI agents

https://docs.smooth.sh/cli/overview
77•antves•1d ago•57 comments

The Oklahoma Architect Who Turned Kitsch into Art

https://www.bloomberg.com/news/features/2026-01-31/oklahoma-architect-bruce-goff-s-wild-home-desi...
19•MarlonPro•3d ago•4 comments

Show HN: Slack CLI for Agents

https://github.com/stablyai/agent-slack
40•nwparker•1d ago•10 comments

Planetary Roller Screws

https://www.humanityslastmachine.com/#planetary-roller-screws
36•everlier•3d ago•8 comments
Open in hackernews

Open-Meteo is a free and open-source weather API for non-commercial use

https://open-meteo.com/
112•Brajeshwar•3w ago

Comments

gnabgib•3w ago
Popular in 2021 (443 points, 147 comments) https://news.ycombinator.com/item?id=28499910
wolvoleo•3w ago
I used to use this with home assistant but you seem to have to give a credit card now even for the free access :(
death916•3w ago
Alot of free services are having to do that now to avoid bots and abuse, unfortunately.
rdmuser•3w ago
The creator has a hn account: https://news.ycombinator.com/user?id=meteo-jeff

His initial comment describing it: https://news.ycombinator.com/item?id=28504740

abetusk•3w ago
This is a very confusingly worded.

I think what they mean is that the data and code itself is libre/free/open [0] [1] but the API access is essentially rate limited for non-paying customers?

[0] https://open-meteo.com/en/licence (CC-BY)

[1] https://github.com/open-meteo/open-meteo/blob/main/LICENSE (AGPL)

tedivm•3w ago
Most APIs, even ones you pay for, are rate limited. I don't think having a rate limit changes the open nature of the API. I'm looking forward to seeing if I can plug this in to my Home Assistant install for weather so I can compare it to Pirate Weather which I use now.
abetusk•3w ago
Agreed. I think the source code is open and I think the data is open. The by-line is just a bit confusing.

I think what they're trying to say is "Our service is completely open source. Our code is open source and our data is open source. We provide reasonable rate limits to our API access for non-paying customers. See our pricing plan if you'd like to become a commercial user and increase your rate limits".

open-meteo•3w ago
Hi, creator of Open-Meteo here. The limits are 600 calls / min, 5.000 calls / hour and 10.000 calls / day. Limits are applied on an IP basis.

This is not ideal for shared hosting services like cloudflare workers, but is the easiest and privacy-friendly way to limit access to fair-use.

Additionally, weather data is uploaded to a AWS S3 open-data sponsorship and you can run your own API instances (even commercially). The only draw back is, that a lot of data needs to transferred. I am working on a S3 cloud-native approach, but it is still in testing.

The free tier is cross-financed by commercial customers that use the service for energy forecasting, agriculture planing or wild fire prevention. There is no external funding, VCs, or whatsoever, the code is build in public on GitHub and I intent to continue running the free API service as is.

linker3000•3w ago
I tried this with Node-RED for a Meshtastic project (MeshBop), but experienced occasional timeouts even when only making a handful of calls per hour. In the end I moved to Met Norway's API for UK/EU weather.
alsetmusic•3w ago
What timing. I was on a hunt only yesterday for free weather APIs for scripting on a personal hobby. I recognize the page design, but I can’t recall how it rated compared to the competition nor whether it made the list to use. I’ll revisit when I get back to my computer. I live HN.
boxed•3w ago
Open-Meteo is amazing. I use it for my iOS weather app Frej: https://github.com/boxed/frej
hazbot•3w ago
We are a happy paying customer at $DAYJOB.

Also, I looked into omfiles for a project recently, I was very impressed with their speed and blown away by the compression ratios!

ChrisArchitect•3w ago
See also Pirate Weather https://pirateweather.net/ which powers Merry Sky
williamcotton•3w ago
Hey, I was literally just writing up this example for a DSL I'm working on:

  GET /:city/weather.svg
    |> fetch("https://geocoding-api.open-meteo.com/v1/search?name=" + .params.city + "&count=10&language=en&format=json", {method: "GET"})
    |> jq: `{
      latitude: .data.response.results[0].latitude | tostring,
      longitude: .data.response.results[0].longitude | tostring
    }`
    |> fetch("https://api.open-meteo.com/v1/forecast?latitude=" + .latitude + "&longitude=" + .longitude + "&hourly=temperature_2m", {method: "GET"})
    |> jq: `
      .data.response.hourly as $h |
      [$h.time, $h.temperature_2m] | transpose | map({time: .[0], temp: .[1]})
    `
    |> gg({ "type": "svg", "width": 800, "height": 400} ): `
      aes(x: time, y: temp)
        | line()
        | point()
    `
Thanks for the service, I use it for demos all the time!
szszrk•3w ago
I use it with an excellent Android app Breezy Weather (from f-droid) for a few years now.

It's the best weather data and presentation I ever had. The only solution that is clean and where long term predictions are worth something. Partially because of the data source, partially because of the UI that doesn't bullshit me.

karteum•2w ago
That's great ! FWIW I generated a small web app (I am just starting to experiment with Claude and Devstral and that seemed a good exercise :), and put it online in case it would be useful https://meteo.karteum.ovh (e.g. during my last trips I used the weather forecasts to refine where I would go more precisely within the country. But I was frustrated as many meteo websites are full of ads...)