# Solar Return API

> Solar Return API. Generate a solar return chart for any year, the foundational technique for annual astrological forecasting. The chart is cast for the

- Capability page: https://roxyapi.com/apis/solar-return-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

Generate a solar return chart for any year, the foundational technique for annual astrological forecasting. The chart is cast for the exact moment the transiting Sun returns to its natal ecliptic longitude (your astrological birthday). Returns full tropical zodiac chart with planetary positions, house cusps, aspects, Ascendant, and Midheaven. Location-sensitive: relocating your solar return chart to a different city changes the houses and Ascendant. Solar return chart API, annual horoscope forecast, birthday chart calculator, yearly astrology prediction, relocated solar return.

## Endpoints

- `POST /api/v2/astrology/solar-return` Solar Return Chart - Annual birthday forecast with relocated chart
- `POST /api/v2/astrology/lunar-return` Lunar Return Chart - Monthly emotional forecast with Moon cycle chart
- `POST /api/v2/astrology/planetary-returns` Planetary Return Chart - Saturn return, Jupiter return, and inner planet cycles

## Example request

```bash
curl -X POST "https://roxyapi.com/api/v2/astrology/solar-return" \
  -H "X-API-Key: YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{"birthDate":"1990-07-15","birthTime":"14:30:00","returnYear":2026,"latitude":40.7128,"longitude":-74.006,"timezone":-5}'
```

## Example response

```json
{
  "birthDate": "1990-07-15",
  "solarReturnDate": "2026-07-15T08:42:00",
  "solarReturnYear": 2026,
  "location": {
    "latitude": 0,
    "longitude": 0,
    "timezone": 0
  },
  "chart": {
    "birthDetails": {
      "date": "1990-07-15",
      "time": "14:30:00",
      "latitude": 40.7128,
      "longitude": -74.006,
      "timezone": -5
    },
    "planets": [
      {
        "name": "Sun",
        "longitude": 112.45,
        "latitude": 0.01,
        "sign": "Cancer",
        "degree": 22.45,
        "house": 7,
        "speed": 0.9571,
        "isRetrograde": false
      }
    ],
    "houses": [
      {
        "number": 1,
        "longitude": 45.32,
        "sign": "Taurus",
        "degree": 15.32
      }
    ],
    "houseSystem": "placidus",
    "aspects": [
      {
        "planet1": "Sun",
        "planet2": "Moon",
        "type": "TRINE",
        "angle": 120,
        "orb": 2.5,
        "isApplying": true,
        "strength": 75,
        "interpretation": "harmonious"
      }
    ],
    "partOfFortune": {
      "sign": "Aries",
      "degree": 27.24,
      "longitude": 27.24,
      "sect": "night"
    },
    "vertex": {
      "sign": "Virgo",
      "degree": 12.9,
      "longitude": 162.9
    }
  },
  "natalSunPosition": {
    "longitude": 0,
    "sign": "Cancer",
    "degree": 22.45
  },
  "interpretation": {
    "summary": "string",
    "purpose": "string",
    "keyThemes": [
      "string"
    ]
  }
}
```

## 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/solar-return`: `post_astrology_solar_return`. `tools/list` is free; `tools/call` bills the same as REST.

## FAQ

### What does the Solar Return API return?

Generate a solar return chart for any year, the foundational technique for annual astrological forecasting. 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 Solar Return 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 Solar Return 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 Solar Return 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 Solar Return 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 Solar Return 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 Solar Return API is included at no extra cost.

### What lang values does the Solar Return 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.