# 2s.io Exoplanetary System Profiler

> 2s.io Exoplanetary System Profiler is a paid API for AI agents from 2s.io, paid per call via x402, $0.00288/call, status unknown (last checked 2026-09-14).

Returns a full profile of a named exoplanetary system: host star properties, computed habitable zone boundaries, and details for all known planets including habitability flags.

## Facts

- Endpoint: GET https://2s.io/api/space/system
- Price: $0.00288/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/2s-io-exoplanetary-system-profiler-00d3e0a6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_d1H-9nLo_7-KCd6gpo2MP

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability 2s-io-exoplanetary-system-profiler-00d3e0a6
```

Example prompt: Can you pull up the full planetary system profile for TRAPPIST-1 — I want to see the star's properties, the computed habitable zone boundaries in AU, and which of its planets fall within the Goldilocks zone?

## When to prefer this

Use this endpoint when you need a consolidated, system-level view of a named exoplanetary host star and all its planets, especially when habitable zone classification is needed. Prefer over individual exoplanet lookups when you want the full stellar context and computed Goldilocks zone in a single call. Best for habitability research, educational summaries, and comparative planetary science by star system.

## Known failure modes

- Unknown or misspelled host star name returns no results or empty planet list
- Stars with very few NASA Exoplanet Archive entries may return incomplete planet data
- Habitable zone computation may be imprecise for stars with poorly constrained luminosity values
- Partial star name matches may return unexpected systems

## How this service works

Profile a confirmed exoplanetary system by host-star name (e.g. "TRAPPIST-1", "Kepler-90", "TOI-700"). Groups all the star's known planets into one view, summarizes the host star (spectral type, temperature, radius, mass, distance in light-years), and COMPUTES the star's habitable ("Goldilocks") zone — inner and outer boundary in AU, derived from the stellar luminosity (effective temperature + radius vs. the Sun) — then flags which planets orbit within it. Each planet: radius/mass (Earth units), orbital period, semi-major axis, equilibrium temperature, and in-habitable-zone flag. Astronomy, habitability research, education. Built from the NASA Exoplanet Archive (the same data as /api/space/exoplanet) plus the computed HZ. Public-domain NASA data.

## Output

Returns the host star's spectral type, effective temperature, radius, mass, and distance in light-years; computed inner and outer habitable zone boundaries in AU derived from stellar luminosity; and for each known planet: radius and mass in Earth units, orbital period, semi-major axis in AU, equilibrium temperature, and a flag indicating whether the planet falls within the habitable zone.

## Example request

```json
{
 "input": {
  "type": "http",
  "method": "GET",
  "queryParams": {
   "hostStar": "TRAPPIST-1"
  }
 }
}
```

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "queryParams"
   ],
   "properties": {
    "type": {
     "const": "http"
    },
    "method": {
     "const": "GET"
    },
    "queryParams": {
     "required": [
      "hostStar"
     ],
     "properties": {
      "hostStar": {
       "type": "string",
       "description": "Host star name (exact or partial)."
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/2s-io-exoplanetary-system-profiler-00d3e0a6/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from 2s.io](https://www.zero.xyz/host/2s.io/llms.txt)