# Fixed Stars API

> Fixed Stars Astrology API. Calculate the tropical zodiac positions of the major named fixed stars for any birth moment, including the four Royal stars and

- Capability page: https://roxyapi.com/apis/fixed-stars-api
- Full domain: https://roxyapi.com/products/astrology-api
- OpenAPI spec: https://roxyapi.com/api/v2/astrology/openapi.json
- Remote MCP server: https://roxyapi.com/mcp/astrology

## Overview

Calculate the tropical zodiac positions of the major named fixed stars for any birth moment, including the four Royal stars and the fifteen Behenian stars, then detect conjunctions to the natal planets, Ascendant, and Midheaven. Each star returns its precessed ecliptic longitude, zodiac sign, visual magnitude, and traditional planetary nature, with a plain language interpretation for every conjunction inside the chosen orb. A focused tool for natal reports that weigh Regulus, Spica, Aldebaran, Antares, and Algol against the chart.

## Endpoints

- `POST /api/v2/astrology/fixed-stars` Fixed stars and star conjunctions calculator - Regulus, Spica, Algol natal report

## Example request

```bash
curl -X POST "https://roxyapi.com/api/v2/astrology/fixed-stars" \
  -H "X-API-Key: YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{"date":"1990-07-15","time":"14:30:00","latitude":40.7128,"longitude":-74.006,"timezone":-5}'
```

## Example response

```json
{
  "birthDetails": {
    "date": "1990-07-15",
    "time": "14:30:00",
    "latitude": 40.7128,
    "longitude": -74.006,
    "timezone": -5
  },
  "orb": 1,
  "stars": [
    {
      "id": "regulus",
      "name": "Regulus",
      "longitude": 150.06,
      "sign": "Virgo",
      "degree": 0.06,
      "magnitude": 1.4,
      "nature": "Mars and Jupiter",
      "keywords": [
        "royalty",
        "honor",
        "power",
        "ambition",
        "downfall"
      ],
      "conjunctions": [
        {
          "point": "Sun",
          "pointLongitude": 149.21,
          "orb": 0.62
        }
      ]
    }
  ],
  "conjunctions": [
    {
      "star": "Regulus",
      "point": "Sun",
      "orb": 0.62,
      "interpretation": "string"
    }
  ],
  "summary": "Fixed star positions for 1990-07-15 with 3 conjunctions within 1 degrees across the major named stars including Regulus, Spica, and Algol."
}
```

## Remote MCP

Every endpoint is a callable tool on the Remote MCP server at https://roxyapi.com/mcp/astrology over Streamable HTTP. Tool name for `POST /astrology/fixed-stars`: `post_astrology_fixed_stars`. `tools/list` is free; `tools/call` bills the same as REST.

## FAQ

### What does the Fixed Stars API return?

Calculate the tropical zodiac positions of the major named fixed stars for any birth moment, including the four Royal stars and the fifteen Behenian stars, then detect conjunctions to the natal planets, Ascendant, and Midheaven. Every response is structured JSON with documented fields, not free text, so you map it straight into your product.

### How do I authenticate with the Fixed Stars API?

Pass your key in the X-API-Key header on every request. Keys are delivered instantly at checkout with no approval queue. Use a secret sk key server side, or mint a publishable pk key locked to your origins for browser and no-code use.

### Does the Fixed Stars API support multiple languages?

Yes. Append the lang query parameter to any endpoint for responses in English, German, Spanish, French, Hindi, Portuguese, Russian and Turkish. The translated payload includes the full interpretation text, not just field labels.

### Do I need coordinates to call the Fixed Stars API?

No. Call GET /location/search with a city name first, then pass latitude, longitude, and timezone from the first result into the request. Never ask users to type coordinates. Timezone accepts a decimal offset or an IANA name.

### Is the Fixed Stars API available over Remote MCP for AI agents?

Yes. Every endpoint is exposed as a callable tool on the Remote MCP server at https://roxyapi.com/mcp/astrology over Streamable HTTP, so Claude, ChatGPT, Cursor, and any MCP client auto-discover it with no local setup or Docker.

### How is the Fixed Stars API billed?

Flat pricing: 1 request equals 1 quota unit, REST and MCP identical, with no credit weighting or per-token markup. Every plan includes all 12 domains, so the Fixed Stars API is included at no extra cost.

### What lang values does the Fixed Stars API accept?

The lang parameter accepts en, tr, de, es, hi, pt, fr, ru. Case-insensitive where it is a path value.

## Full reference

Fetch the OpenAPI spec at https://roxyapi.com/api/v2/astrology/openapi.json. Master agent manifest at https://roxyapi.com/llms.txt.