What is an Astrology API?

An Astrology API (Application Programming Interface) is a web service that provides developers with programmatic access to astrological calculations, interpretations, and data. Instead of building complex astronomical algorithms from scratch, developers can make simple HTTP requests to get birth charts, horoscopes, planetary positions, compatibility analysis, and predictive insights.

Think of an astrology API as a powerful astrological calculator accessible via the internet. You send it birth information (date, time, location), and it returns comprehensive astrological data in a structured format (typically JSON) that your application can consume and display.

Why Use an Astrology API?

Building astrology calculations from scratch is extraordinarily complex. Here's why APIs make sense:

• Astronomical Complexity: Calculating planetary positions requires handling orbital mechanics, gravitational perturbations, and ephemeris data spanning thousands of years. This demands specialized mathematical expertise.
• Timezone & Location Handling: Converting local birth time to UTC, managing daylight saving time changes across decades, and handling historical timezone shifts is error-prone without comprehensive databases.
• Astrological Rules: Implementing 300+ yoga combinations, dosha calculations, house systems, aspect rules, and strength calculations requires deep astrological knowledge.
• Continuous Updates: Ephemeris data, timezone databases, and calculation algorithms need regular updates. APIs handle this automatically.
• Performance: Server-side calculation engines are optimized for speed and accuracy, often processing requests in milliseconds.
• Multi-Language Support: Quality APIs provide predictions in 20+ languages without you building translation layers.

Types of Astrology APIs

Astrology APIs generally fall into several categories:

1. Vedic Astrology APIs (Jyotish)

Focus on Indian/Hindu astrology using sidereal zodiac calculations with Ayanamsa correction. Features include:

• Birth chart (Kundali) generation
• Vimshottari Dasha periods
• Nakshatra (lunar mansion) analysis
• Yoga and Dosha detection
• Kundali matching (Ashtakoota)
• Panchang (Hindu calendar)
• Muhurtha (auspicious timing)

2. Western Astrology APIs

Based on tropical zodiac system. Key features:

• Natal chart calculations
• Transit interpretations
• Progression analysis
• Synastry (relationship compatibility)
• Psychological interpretations
• Aspect patterns (T-squares, Grand Trines)

3. Hybrid APIs

Modern APIs like Vedika support both Vedic and Western systems, plus innovative features like AI-powered chatbot queries that let users ask natural language questions.

4. Specialized APIs

• Horoscope APIs: Focus on daily/weekly/monthly predictions
• Compatibility APIs: Specialized in relationship matching
• Numerology APIs: Number-based predictions and analysis
• Tarot APIs: Card reading and interpretations

How Astrology APIs Work

Understanding the technical workflow helps you integrate more effectively. Here's the complete process:

Step 1: Authentication

Most APIs use API key authentication. You include your unique key in request headers:

GET /v1/birth-chart HTTP/1.1
Host: api.vedika.io
x-api-key: YOUR_API_KEY
Content-Type: application/json

Step 2: Send Birth Data

Make an HTTP POST request with birth information:

{
  "date": "1990-06-15",
  "time": "14:30",
  "latitude": 28.6139,
  "longitude": 77.2090,
  "timezone": 5.5,
  "ayanamsa": "lahiri"
}

Step 3: Server-Side Processing

The API server performs several operations:

a) Timezone Conversion

Converts local time to UTC using comprehensive timezone databases. This handles:

• Current timezone offsets
• Historical daylight saving time changes
• Political boundary changes affecting timezones

b) Astronomical Calculations

Uses ephemeris engines (Swiss Ephemeris, NASA JPL data) to calculate:

• Exact planetary positions at birth moment
• Moon phases and lunar mansions
• House cusps using selected house system
• Planetary aspects and orbs
• Asteroid positions if requested

c) Astrological Analysis

Applies astrological rules to detect:

• Yogas (planetary combinations)
• Doshas (afflictions)
• Planetary strengths (Shadbala, Ashtakavarga)
• Special planetary states (exaltation, debilitation, retrograde)
• Dasha periods and sub-periods

d) Interpretation Generation

Advanced APIs use AI/ML to generate human-readable interpretations based on chart factors.

Step 4: Return Structured Data

API returns comprehensive JSON response:

{
  "status": "success",
  "data": {
    "planets": {
      "sun": {
        "sign": "Gemini",
        "degree": 24.56,
        "house": 10,
        "nakshatra": "Punarvasu",
        "retrograde": false
      },
      "moon": {
        "sign": "Pisces",
        "degree": 12.34,
        "house": 7,
        "nakshatra": "Uttara Bhadrapada",
        "retrograde": false
      }
    },
    "houses": {
      "1": "Virgo",
      "2": "Libra",
      "3": "Scorpio"
    },
    "yogas": [
      {
        "name": "Gajakesari Yoga",
        "description": "Moon and Jupiter in kendras...",
        "strength": "strong"
      }
    ],
    "dashas": {
      "mahadasha": {
        "planet": "Venus",
        "start": "2018-06-15",
        "end": "2038-06-15"
      }
    }
  }
}

The Role of Ephemeris

The ephemeris is the heart of any astrology API. It's a database of planetary positions calculated for every day across thousands of years. Quality APIs use:

• Swiss Ephemeris: Gold standard with 99.99% accuracy, used by Vedika, Astro.com, and professional software
• NASA JPL Horizons: Scientific-grade data from NASA's Jet Propulsion Laboratory
• Moshier Ephemeris: Analytical approximation, slightly less accurate but covers extended time ranges

Budget APIs might use simplified calculations or lower-precision ephemeris, which affects accuracy. Always verify which ephemeris an API uses.

Key Features to Look For

When evaluating astrology APIs, consider these essential features:

1. Birth Chart Calculations

• Planetary Positions: 9 planets (Vedic) or 10+ (Western including Uranus, Neptune, Pluto)
• House Systems: Placidus, Koch, Equal House, Whole Sign, etc.
• Ayanamsa Support: Lahiri, Raman, Krishnamurti, Yukteshwar, etc.
• Divisional Charts: D9 (Navamsa), D10 (Dasamsa), all 16 Vargas
• Aspects: Conjunction, opposition, trine, square, sextile with orbs

2. Predictive Features

• Dasha Systems: Vimshottari (most common), Yogini, Ashtottari
• Transit Analysis: Current planetary movements affecting birth chart
• Progressions: Secondary, solar arc, tertiary
• Returns: Solar return, lunar return charts

3. Compatibility Analysis

• Ashtakoota: 36-point Vedic matching system
• Synastry: Cross-aspect analysis between two charts
• Composite Charts: Midpoint charts for relationships
• Dosha Matching: Mangal Dosha, Kaal Sarp Dosha compatibility

4. Specialized Calculations

• Panchang: Tithi, Nakshatra, Yoga, Karana for daily calendar
• Muhurtha: Auspicious timing for events
• Numerology: Life path numbers, destiny numbers
• Remedies: Gemstone, mantra, charity recommendations

5. AI & Modern Features

Cutting-edge APIs like Vedika offer:

• Chatbot Queries: Natural language questions ("When will I get married?")
• AI Interpretations: Context-aware, personalized readings
• Multi-Agent Systems: Specialized AI agents for different chart aspects
• Pattern Recognition: ML-powered yoga and pattern detection

6. Technical Capabilities

• Response Time: Sub-second processing for most queries
• Uptime: 99.9%+ availability with redundant systems
• Rate Limits: Generous limits (1000+ requests/hour)
• Documentation: Comprehensive guides, code examples, SDKs
• Language Support: Predictions in 20+ languages
• Webhooks: Event-driven notifications for transit alerts
• Batch Processing: Process multiple charts in one request

Real-World Use Cases

Astrology APIs power a wide range of applications across industries:

1. Mobile Astrology Apps

The most common use case. Examples:

• Daily Horoscope Apps: Send personalized predictions based on birth charts
• Birth Chart Calculators: Generate and display Kundali/natal charts
• Astrology Learning Apps: Teach users about their charts interactively
• Transit Alert Apps: Notify users of important planetary movements

Example: Co-Star (Western) and AstroSage (Vedic) apps serve millions using astrology APIs.

2. Matrimonial & Dating Platforms

Critical for Indian wedding sites:

• Kundali Matching: Automatic compatibility scoring for profiles
• Dosha Detection: Flag Mangal Dosha, Kaal Sarp Dosha
• Match Filters: Filter prospects by astrological compatibility
• Personalized Recommendations: Suggest best matches based on charts

Example: Shaadi.com and BharatMatrimony integrate Kundali matching APIs.

3. E-Commerce & Recommendation Engines

• Gemstone E-Commerce: Recommend stones based on birth charts
• Product Recommendations: Suggest items aligned with planetary periods
• Personalized Marketing: Time campaigns to favorable transits
• Lucky Numbers: Generate personalized numbers for lottery apps

4. Chatbots & Conversational AI

Growing category with AI integration:

• WhatsApp Astrology Bots: Answer astrological queries via messaging
• Telegram Horoscope Bots: Daily predictions and chart analysis
• Website Chat Widgets: Real-time astrology consultations
• Voice Assistants: "Alexa, what's my horoscope today?"

Example: Build a WhatsApp bot using Vedika's chatbot API.

5. Content Websites & Blogs

• Auto-Generated Horoscopes: Daily content without manual writing
• Personalized Landing Pages: Show relevant predictions per visitor
• Interactive Tools: Birth chart calculators, compatibility checkers
• Newsletter Content: Automated weekly/monthly forecasts

6. Professional Astrology Software

• Consultation Platforms: Astrologers offer online readings
• Client Management: Store and analyze multiple client charts
• Automated Reports: Generate professional PDF reports
• Teaching Platforms: Educational courses with chart examples

7. Wellness & Mental Health Apps

• Mood Tracking: Correlate emotions with planetary transits
• Meditation Apps: Suggest practices based on current dashas
• Therapy Integration: Provide astrological context for therapists
• Self-Improvement: Timing for goal-setting and habit formation

8. Finance & Trading Apps

Emerging niche (use responsibly):

• Astrological Trading: Market predictions based on planetary cycles
• Economic Astrology: National charts and economic forecasts
• Muhurtha for Investments: Auspicious timing for financial decisions

Note: Financial astrology should be used as supplementary insight, not sole decision-making criteria. Always include appropriate disclaimers.

Technical Architecture

Understanding the underlying architecture helps you optimize integration and troubleshooting.

Typical API Stack

1. Frontend Layer (Your Application)

• Web app (React, Vue, Angular)
• Mobile app (iOS, Android, React Native, Flutter)
• Backend service (Node.js, Python, PHP, Java)

2. API Gateway

• Authentication & authorization
• Rate limiting
• Request routing
• Response caching
• Load balancing

3. Application Server

• Business logic
• Request validation
• Timezone conversion
• Response formatting

4. Calculation Engine

• Swiss Ephemeris integration
• Astronomical calculations
• Astrological algorithms
• Yoga detection logic

5. AI/ML Layer (Modern APIs)

• Natural language processing
• Chart interpretation models
• Pattern recognition
• Context-aware responses

6. Data Layer

• Ephemeris database (planetary positions)
• Timezone database
• Interpretation database
• User data (cached charts)

Data Flow Example

1. User enters birth details in your app
2. Your app sends HTTPS POST request to API
3. API Gateway validates API key and rate limits
4. Request routed to available application server
5. Server converts local time to UTC using timezone DB
6. Calculation engine queries ephemeris for planetary positions
7. Astrological algorithms analyze chart and detect yogas
8. AI layer generates interpretations (if requested)
9. Response formatted as JSON and cached
10. Response sent back to your app
11. Your app parses and displays results to user

Performance Optimization Techniques

Server-Side (API Provider)

• Caching: Redis/Memcached for frequently requested calculations
• Database Indexing: Fast ephemeris lookups by date
• Load Balancing: Distribute requests across multiple servers
• CDN: Serve static responses from edge locations
• Horizontal Scaling: Add more servers during peak usage

Client-Side (Your Integration)

• Request Debouncing: Avoid duplicate requests
• Local Caching: Store responses in localStorage/IndexedDB
• Lazy Loading: Request detailed data only when needed
• Batch Requests: Combine multiple queries where supported

Complete Provider Comparison

Here's an honest comparison of major astrology API providers in 2025:

Feature Comparison Matrix

Our Recommendation

Choose Prokerala if you only need traditional Vedic calculations without AI features and prefer a well-established provider.

Choose AstroAPI if you're building Western astrology apps focused on tropical zodiac and modern techniques.

Choose VedicAstroAPI if you're on a tight budget and only need basic Vedic features for the Indian market.

Integration Tutorials

Step-by-step guides to integrate astrology APIs into your applications.

Tutorial 1: Birth Chart in JavaScript (Node.js)

Step 1: Install Dependencies

npm install axios dotenv

Step 2: Set Up Environment Variables

Create .env file:

VEDIKA_API_KEY=your_api_key_here
VEDIKA_BASE_URL=https://api.vedika.io/v1

Step 3: Create Birth Chart Request

// birthChart.js
require('dotenv').config();
const axios = require('axios');

async function getBirthChart(birthData) {
    try {
        const response = await axios.post(
            `${process.env.VEDIKA_BASE_URL}/birth-chart`,
            {
                date: birthData.date,        // "1990-06-15"
                time: birthData.time,        // "14:30"
                latitude: birthData.latitude, // 28.6139
                longitude: birthData.longitude, // 77.2090
                timezone: birthData.timezone,  // 5.5
                ayanamsa: "lahiri"
            },
            {
                headers: {
                    'Authorization': `Bearer ${process.env.VEDIKA_API_KEY}`,
                    'Content-Type': 'application/json'
                }
            }
        );

        return response.data;
    } catch (error) {
        console.error('API Error:', error.response?.data || error.message);
        throw error;
    }
}

// Example usage
const birthData = {
    date: "1990-06-15",
    time: "14:30",
    latitude: 28.6139,
    longitude: 77.2090,
    timezone: 5.5
};

getBirthChart(birthData)
    .then(chart => {
        console.log('Sun Sign:', chart.data.planets.sun.sign);
        console.log('Moon Sign:', chart.data.planets.moon.sign);
        console.log('Ascendant:', chart.data.houses[1]);
        console.log('Active Yogas:', chart.data.yogas.length);
    })
    .catch(err => console.error(err));

Tutorial 2: Daily Horoscope in Python

Step 1: Install Requests Library

pip install requests python-dotenv

Step 2: Create Python Script

# horoscope.py
import os
import requests
from datetime import date
from dotenv import load_dotenv

load_dotenv()

API_KEY = os.getenv('VEDIKA_API_KEY')
BASE_URL = os.getenv('VEDIKA_BASE_URL')

def get_daily_horoscope(zodiac_sign, language='en'):
    """
    Get daily horoscope for a zodiac sign

    Args:
        zodiac_sign (str): aries, taurus, gemini, etc.
        language (str): en, hi, es, etc.

    Returns:
        dict: Horoscope prediction
    """
    endpoint = f"{BASE_URL}/horoscope/daily"

    headers = {
        'Authorization': f'Bearer {API_KEY}',
        'Content-Type': 'application/json'
    }

    payload = {
        'sign': zodiac_sign,
        'date': str(date.today()),
        'language': language
    }

    try:
        response = requests.post(endpoint, json=payload, headers=headers)
        response.raise_for_status()
        return response.json()
    except requests.exceptions.RequestException as e:
        print(f"Error: {e}")
        return None

# Example usage
if __name__ == "__main__":
    signs = ['aries', 'taurus', 'gemini', 'cancer', 'leo', 'virgo',
             'libra', 'scorpio', 'sagittarius', 'capricorn', 'aquarius', 'pisces']

    for sign in signs:
        horoscope = get_daily_horoscope(sign)
        if horoscope:
            print(f"\n{sign.upper()} - {horoscope['data']['date']}")
            print(f"Prediction: {horoscope['data']['prediction']}")
            print(f"Lucky Color: {horoscope['data']['lucky_color']}")
            print(f"Lucky Number: {horoscope['data']['lucky_number']}")

Tutorial 3: Kundali Matching in PHP

<?php
// kundaliMatching.php

class VedikaAPI {
    private $apiKey;
    private $baseUrl;

    public function __construct($apiKey, $baseUrl = 'https://api.vedika.io/v1') {
        $this->apiKey = $apiKey;
        $this->baseUrl = $baseUrl;
    }

    public function matchKundali($person1, $person2) {
        $url = $this->baseUrl . '/kundali-matching';

        $data = [
            'person1' => [
                'date' => $person1['date'],
                'time' => $person1['time'],
                'latitude' => $person1['latitude'],
                'longitude' => $person1['longitude'],
                'timezone' => $person1['timezone']
            ],
            'person2' => [
                'date' => $person2['date'],
                'time' => $person2['time'],
                'latitude' => $person2['latitude'],
                'longitude' => $person2['longitude'],
                'timezone' => $person2['timezone']
            ]
        ];

        $ch = curl_init($url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_POST, true);
        curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($data));
        curl_setopt($ch, CURLOPT_HTTPHEADER, [
            'Authorization: Bearer ' . $this->apiKey,
            'Content-Type: application/json'
        ]);

        $response = curl_exec($ch);
        $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
        curl_close($ch);

        if ($httpCode === 200) {
            return json_decode($response, true);
        } else {
            throw new Exception("API Error: " . $response);
        }
    }
}

// Example usage
$vedika = new VedikaAPI('your_api_key_here');

$person1 = [
    'date' => '1990-06-15',
    'time' => '14:30',
    'latitude' => 28.6139,
    'longitude' => 77.2090,
    'timezone' => 5.5
];

$person2 = [
    'date' => '1992-03-20',
    'time' => '10:15',
    'latitude' => 19.0760,
    'longitude' => 72.8777,
    'timezone' => 5.5
];

try {
    $result = $vedika->matchKundali($person1, $person2);

    echo "Compatibility Score: " . $result['data']['total_points'] . "/36\n";
    echo "Match Percentage: " . $result['data']['match_percentage'] . "%\n";
    echo "Conclusion: " . $result['data']['conclusion'] . "\n";

    // Individual guna scores
    foreach ($result['data']['gunas'] as $guna) {
        echo $guna['name'] . ": " . $guna['score'] . "/" . $guna['max'] . "\n";
    }
} catch (Exception $e) {
    echo "Error: " . $e->getMessage();
}
?>

Tutorial 4: React App Integration

Step 1: Create React Component

// BirthChartCalculator.jsx
import React, { useState } from 'react';
import axios from 'axios';

function BirthChartCalculator() {
    const [formData, setFormData] = useState({
        date: '',
        time: '',
        latitude: '',
        longitude: '',
        timezone: '5.5'
    });

    const [chartData, setChartData] = useState(null);
    const [loading, setLoading] = useState(false);
    const [error, setError] = useState(null);

    const handleSubmit = async (e) => {
        e.preventDefault();
        setLoading(true);
        setError(null);

        try {
            const response = await axios.post(
                'https://api.vedika.io/v1/birth-chart',
                formData,
                {
                    headers: {
                        'Authorization': `Bearer ${process.env.REACT_APP_VEDIKA_API_KEY}`,
                        'Content-Type': 'application/json'
                    }
                }
            );

            setChartData(response.data.data);
        } catch (err) {
            setError(err.response?.data?.message || 'Failed to fetch chart');
        } finally {
            setLoading(false);
        }
    };

    return (
        

            
Birth Chart Calculator

            

                

                    

                        Birth Date
                         setFormData({...formData, date: e.target.value})}
                            className="w-full border p-2 rounded"
                            required
                        />
                    

                    

                        Birth Time
                         setFormData({...formData, time: e.target.value})}
                            className="w-full border p-2 rounded"
                            required
                        />
                    

                    

                        Latitude
                         setFormData({...formData, latitude: e.target.value})}
                            className="w-full border p-2 rounded"
                            required
                        />
                    

                    

                        Longitude
                         setFormData({...formData, longitude: e.target.value})}
                            className="w-full border p-2 rounded"
                            required
                        />
                    
                

                
                    {loading ? 'Calculating...' : 'Calculate Birth Chart'}
                
            

            {error && (
                

                    {error}
                
            )}

            {chartData && (
                

                    
Your Birth Chart

                    

                        

                            
Planetary Positions
                            

                                {Object.entries(chartData.planets).map(([planet, data]) => (
                                    

                                        {planet}: {data.sign} ({data.degree.toFixed(2)}°)
                                        {data.retrograde && ' ℞'}
                                    
                                ))}
                            
                        

                        

                            
Houses
                            

                                {Object.entries(chartData.houses).map(([house, sign]) => (
                                    

                                        House {house}: {sign}
                                    
                                ))}
                            
                        
                    

                    {chartData.yogas && chartData.yogas.length > 0 && (
                        

                            
Active Yogas
                            

                                {chartData.yogas.map((yoga, idx) => (
                                    

                                        {yoga.name}
                                        
{yoga.description}
                                    
                                ))}
                            
                        
                    )}
                
            )}
        
    );
}

export default BirthChartCalculator;

Tutorial 5: AI Chatbot Integration (Vedika Exclusive)

// astrologyChatbot.js
const axios = require('axios');

async function askAstrologyQuestion(birthData, question) {
    const response = await axios.post(
        'https://api.vedika.io/v1/ai/chat',
        {
            birth_data: {
                date: birthData.date,
                time: birthData.time,
                latitude: birthData.latitude,
                longitude: birthData.longitude,
                timezone: birthData.timezone
            },
            question: question,
            language: 'en'
        },
        {
            headers: {
                'Authorization': `Bearer ${process.env.VEDIKA_API_KEY}`,
                'Content-Type': 'application/json'
            }
        }
    );

    return response.data.data.answer;
}

// Example usage
const myBirthData = {
    date: "1990-06-15",
    time: "14:30",
    latitude: 28.6139,
    longitude: 77.2090,
    timezone: 5.5
};

// Natural language questions
const questions = [
    "When will I get married?",
    "What gemstone should I wear?",
    "Which career is best for me?",
    "Am I in a favorable planetary period?",
    "What are my strengths according to my chart?"
];

questions.forEach(async (q) => {
    const answer = await askAstrologyQuestion(myBirthData, q);
    console.log(`Q: ${q}`);
    console.log(`A: ${answer}\n`);
});

Pro Tip: Vedika's AI chatbot is the only feature of its kind in the astrology API market. It allows users to ask questions naturally instead of calling specific endpoints, creating a much more engaging user experience.

More Tutorials

• Build a WhatsApp Astrology Bot with Vedika
• Create a Telegram Horoscope Bot
• Complete Astrology App Tutorial (React + Flask)

Best Practices for Integration

1. API Key Security

• Never expose API keys in frontend code: Use environment variables and backend proxies
• Rotate keys regularly: Change keys every 90 days or after suspected exposure
• Use separate keys: Different keys for development, staging, production
• Monitor usage: Set up alerts for unusual API call patterns

2. Error Handling

async function callAstrologyAPI(endpoint, data) {
    try {
        const response = await axios.post(endpoint, data);
        return response.data;
    } catch (error) {
        if (error.response) {
            // Server responded with error
            switch (error.response.status) {
                case 400:
                    throw new Error('Invalid birth data provided');
                case 401:
                    throw new Error('Invalid API key');
                case 429:
                    throw new Error('Rate limit exceeded. Please try again later.');
                case 500:
                    throw new Error('Server error. Please contact support.');
                default:
                    throw new Error('API request failed');
            }
        } else if (error.request) {
            // No response received
            throw new Error('Network error. Check your internet connection.');
        } else {
            // Request setup error
            throw new Error('Failed to create API request');
        }
    }
}

3. Caching Strategies

• Cache birth charts: Charts don't change, cache indefinitely with user ID as key
• Cache daily horoscopes: Cache for 24 hours with sign+date as key
• Don't cache chatbot responses: They're contextual and personalized
• Use Redis or Memcached: Fast in-memory caching for server-side apps
• LocalStorage for web apps: Cache user's own chart data client-side

4. Rate Limiting & Optimization

• Implement request debouncing: Avoid multiple requests for same data
• Use batch endpoints: Some APIs support multiple calculations in one request
• Lazy load detailed data: Request basic info first, detailed on user action
• Monitor your quota: Track API usage to avoid surprise overages

5. User Experience

• Show loading states: API calls may take 200-500ms
• Provide fallback content: Show cached/generic content if API fails
• Validate input: Check birth data on frontend before API call
• Use location APIs: Google Places API for accurate coordinates

6. Data Privacy & Compliance

• GDPR Compliance: If serving EU users, ensure proper consent and data handling
• Don't store birth data unnecessarily: Only cache with user permission
• Provide data deletion: Let users delete their astrological profiles
• Secure transmission: Always use HTTPS for API requests

7. Testing & QA

• Test edge cases: Leap years, timezone boundaries, historical dates
• Verify calculations: Cross-check with established astrology software
• Test error scenarios: Invalid API keys, malformed data, network failures
• Load testing: Simulate high traffic to ensure performance

8. Monitoring & Analytics

• Track API response times: Monitor for performance degradation
• Log API errors: Use services like Sentry to catch issues
• Monitor usage patterns: Which endpoints are most popular?
• Set up alerts: Get notified of API downtime or quota limits

Frequently Asked Questions