High-performance astrology API for developers to calculate natal charts, transits, and synastry
Stage
Not given
Not given
Founded
Not given
Not given
Based in
US
Not given
Pricing model
Paid
Freemium
Pricing
Pay as you go with no subscriptions or plans. Credits are added to an account and used only for actual tool runs. Pricing varies by tool; examples include $0.195 per hour of audio for AssemblyAI, $0.00559 per minute for Deepgram audio, $0.156 per minute for ElevenLabs audio isolation, $2.86 per minu
Free: $0 with 80 requests/day. Entry: $8/month with 50,000 requests/month. High: $40/month with 500,000 requests/month. All tiers include hosted MCP access and commercial use allowed.
Key features
Connect to 3,500+ tools from 17 providers
Runtime tool discovery for agents
One API key for all tools
Pay-as-you-go pricing with no subscriptions
Works with any AI agent
Credits never expire
Clear per-tool pricing displayed before running
Support for media creation tools
Integration with SEO and search tracking tools
Natal chart calculations with planetary positions and house systems
Multiple house systems including Placidus, Whole Sign, Koch, Equal, and Regiomontanus
Vedic astrology with Kundli, Dasha systems, and Panchang calculations
Chinese BaZi (Four Pillars) with Day Master strength and 12 Life Stages
Transit timeline and synastry analysis for relationship comparisons
Premium text reports with 8,000-9,000 words for monetization
Hosted MCP server for AI tool integration and LLM files
Geo city search with timezone and location lookup for birth data
What makes it different
1,685 priced tools with transparent per-use costs
No need to manage separate API keys and subscriptions
Agents automatically discover the right tool for each task
Works across all major AI agent platforms
Single balance and prepaid model eliminates subscription overhead
French Ephemeris Professional Licence for highest precision and accurate timezone handling
Optimized calculation engine for millisecond response times
99.9% uptime SLA with developer-first support and comprehensive documentation
Type-safe JSON responses with consistent data structures for TypeScript integration
Support for Western, Vedic, and Chinese astrology systems in single API
Spiral
FreeAstroAPI