Lobsters API
Free Lobsters API with no key: hottest and newest technology stories with tags, scores, comments and submitter data as plain JSON. No signup. Tested.
Endpoint tested and returned HTTP 200 on 20 Aug 2026
What is the Lobsters API?
Lobsters provides a free, key-free JSON API for its computing-focused link aggregator, returning hottest and newest stories with tags, scores, comment counts and submitter information.
Lobsters is a smaller, more technically focused alternative to Hacker News, and its API could not be simpler: append `.json` to any listing page URL and you get structured data. No separate API host, no documentation to hunt for.
Its tagging system is the real differentiator. Every story carries curated tags such as `rust`, `security` or `distributed`, which makes topic filtering far more precise than keyword searching a general feed.
Quick facts
- Base URL
https://lobste.rs- Authentication
- No API key required.
- Rate limit
- No published limit; the site asks that you cache and identify yourself with a User-Agent.
- Pricing
- Free and open source.
- CORS
- Not enabled — call it from your server
- Official docs
- Read the docs
How to use the Lobsters API
Every request below was executed against the live API on 20 Aug 2026, and the response shown is the real body it returned — not an illustration.
1. Fetch the hottest stories
GET https://lobste.rs/hottest.json
curl 'https://lobste.rs/hottest.json'const res = await fetch("https://lobste.rs/hottest.json");
if (!res.ok) throw new Error(`Request failed: ${res.status}`);
const data = await res.json();
console.log(data);import requests
res = requests.get("https://lobste.rs/hottest.json", timeout=20)
res.raise_for_status()
print(res.json())[
{
"short_id": "5gcd3t",
"created_at": "2026-08-19T05:55:29.500-05:00",
"title": "HTML Can Do That",
"url": "https://chrisburnell.com/html-can-do-that/",
"score": 113,
"flags": 0,
"comment_count": 30,
"description": "",
"description_plain": "",
"submitter_user": "abhin4v",
"user_is_author": false,
"tags": [
"web"
],
"short_id_url": "https://lobste.rs/s/5gcd3t",
"comments_url": "https://lobste.rs/s/5gcd3t/html_can_do"
},
{
"short_id": "caubyr",
"created_at": "2026-08-19T01:20:33.273-05:00",
"title": "Bun 1.4 Rust rewrite is not looking good",
"url": "https://tipiirai.com/writing/bun-rust-rewrite-worries",
"score": 83,
"flags": 4,
"comment_count": 77,
"description": "",
"description_plain": "",
"submitter_user": "robinheghan",
"user_is_author": false,
"tags": [
"vibecoding"
],
"short_id_url": "https://lobste.rs/s/caubyr",
"comments_url": "https://lobste.rs/s/caubyr/bun_1_4_rust_rewrite_is_not_looking_good"
},
{
"short_id": "kj1bvt",
"created_at": "2026-08-19T08:01:00.885-05:00",
"title": "Why I still hand write my commit messages",
"url": "https://www.jvt.me/posts/2026/08/17/hand-write-commits/",
"score": 20,
"flags": 2,
"comment_count": 9,
"description": "",
"description_plain": "",
"submitter_user": "JamieTanna",
"user_is_author": true,
"tags": [
"practices",
"vcs",
"vibecoding"
],
"short_id_url": "https://lobste.rs/s/kj1bvt",
"comments_url": "https://lobstParameters
| Parameter | Type | Required | Description |
|---|---|---|---|
hottest.json | path | Optional | Currently highest-ranked stories. hottest.json |
newest.json | path | Optional | Most recently submitted stories. newest.json |
t/<tag>.json | path | Optional | Stories filtered to a tag. t/rust.json |
s/<id>.json | path | Optional | A single story with its comment tree. s/abc123.json |
page | integer | Optional | Page number for pagination. 2 |
Response fields
short_idstring- Story identifier used in URLs.
titlestring- Story title.
urlstring- Linked URL, empty for text posts.
scoreinteger- Net vote score.
comment_countinteger- Number of comments.
tagsarray- Curated topic tags — the main filtering mechanism.
submitter_userobject|string- Who submitted the story.
comments_urlstring- Link to the discussion thread.
What you can build with the Lobsters API
- Build a focused tech news feed filtered by tag
- Monitor discussion of a specific technology
- Aggregate Lobsters alongside other developer news sources
- Create a curated reading list for a team
Common errors and how to fix them
429 or blocked
Polling too aggressively, or no User-Agent.
Fix: Send a descriptive User-Agent and cache — the site is run by volunteers on modest infrastructure.
Empty tag feed
The tag does not exist.
Fix: Tags are a curated fixed set; check /tags for valid values rather than guessing.
Lobsters API — frequently asked questions
Is the Lobsters API free?
Yes, free with no API key. Simply append .json to any listing URL — there is no separate API host.
How is Lobsters different from Hacker News?
It is smaller and more narrowly technical, invite-only for posting, and every story carries curated topic tags — which makes filtering by subject far more precise.
How do I get stories about one topic?
Use the tag feeds, for example /t/rust.json. Tags are curated rather than free-form, so they are reliable.
Is there a rate limit?
Nothing published, but the site runs on volunteer infrastructure. Send a descriptive User-Agent and cache aggressively.
Tools that pair with this API
JSON Formatter
Format, beautify and minify JSON online with 2-space, 4-space or tab indentation. Sort keys alphabetically and catch syntax errors instantly — free and private.
Timestamp Converter
Convert timestamps to human-readable dates and dates back to timestamps. Auto-detects seconds vs milliseconds, shows local, UTC and ISO 8601 formats.
Alternatives to Lobsters API
If Lobsters does not fit, these news & open data apis cover similar ground. Every one was called before publishing, and each links to its own reference page with a working curl command and the response it returned.
| API | What it does | Auth | CORS | Last verified |
|---|---|---|---|---|
| Hacker News | Official Hacker News API with no key: top stories, comments, users and live item feeds via Firebase. Extremely stable. Tested curl example and live JSON. | No key | Yes | 19 Aug 2026 |
| disease.sh | Free open disease and health statistics API with no key: global and per-country case data, historical time series and vaccination figures. Tested example. | No key | Yes | 19 Aug 2026 |
| Spaceflight News | Free spaceflight news API with no key: articles, blogs and reports from major space outlets, with search, filtering and pagination. Tested curl example. | No key | Yes | 19 Aug 2026 |
| Hacker News Search (Algolia) | Free Algolia-powered Hacker News search API with no key: full-text search across all stories and comments with filtering by points, date and author. Tested. | No key | Yes | 20 Aug 2026 |
| Noozra | Free news headlines API with no key: articles from 200+ curated sources with headline, source, category, image URL and its pixel dimensions. Tested example included. | No key | Yes | 21 Aug 2026 |
| RSS to JSON | Free RSS to JSON API with no key: convert any RSS or Atom feed into clean JSON, with feed metadata, items, thumbnails and publication dates. Tested example. | No key | Yes | 20 Aug 2026 |
Lobsters is an independent third-party service and is not affiliated with ByteTools or ByteVancer. Details on this page were verified on 20 Aug 2026; always check the official documentation before relying on this API in production, as terms and limits can change.