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arcsecond.io

Astronomical object data from a single endpoint

🔭 Science & SpaceDEADchecked 9h ago
AUTH NONECORS ✓AGENT ✓HTTPS ✓COMMERCIAL ?

Arcsecond.io consolidates astronomy data sources behind one API, resolving object names to coordinates, aliases, and catalog cross-references. Ask for m1 and it returns the Crab Nebula's equatorial position and a stack of alternate designations. Keyless for basic object lookups.

0HOW IT'S SCORED ⓘ
Docs ↗
Status badge · for your READMEshipapis health badge: 0 · dead
🪦 DEADTHE GRAVEYARD
Uptime history
57.9%90 days
0.0%30 days
503P50 · ms
1489P95 · ms
operationalpartialdownno data
Response time · last 48 checks
Fastest 199 ms, slowest 1194 ms, most recent 381 ms.
Live response samplecaptured by our last successful check
GET https://api.arcsecond.io/objects/m1/

{
  "name": "m1",
  "source": "Simbad",
  "equatorial_coordinates": {
    "right_ascension": 83.6324,
    "declination": 22.0174,
    "epoch": 2451545
  },
  "aliases": [
    {
      "name": "4FGL J0534.5+2201i"
    }
  ]
}
Call itcurl · fetch · python
curl "https://api.arcsecond.io/objects/m1/"
const res = await fetch("https://api.arcsecond.io/objects/m1/");
const data = await res.json();
console.log(data);
import requests

res = requests.get("https://api.arcsecond.io/objects/m1/")
print(res.json())

THIS API IS DEAD — NOTHING TO RUN

Endpoints · 5DeadFULL DOCS ↗
Offline — GET /objects/m1/ no longer responds reliably
GET/objects/m1/PROBED

Astronomical object data from a single endpoint

GET/objects

Objects — documented GET route.

GET/objects/1

Objects details by ID (example: 1).

GET/objects?limit=10

Objects — documented GET route.

GET/objects/search?q=test

Search by query parameters.

Machine-readable spec

We probe a documented GET and expect 2xx JSON — full uptime and health score. Export includes every documented route below.

Response-shape history

Stable. No schema drift observed since monitoring began — the response shape has not changed under our checks.

arcsecond.io: common questions

Is arcsecond.io free to use?

Yes — arcsecond.io is a free science & space API. Free tier: Free — limits not published. Whether the free tier allows commercial use is unclear — check the provider docs.

Does arcsecond.io need an API key?

No — arcsecond.io needs no API key or signup. You can call it straight away; rate limits still apply (Unpublished).

Can I call arcsecond.io from the browser?

Yes — arcsecond.io returns CORS headers over HTTPS, so front-end code can fetch it directly with no backend proxy. Use the fetch snippet on this page, or hit "Run live" to try it now.

Is arcsecond.io up right now?

As of our last scheduled check, arcsecond.io is dead with 57.9% uptime over 90 days and a 503 ms median response. We re-probe it every sweep — the status badge and uptime chart above always show the latest.