Open-source astrology engine for developers: CLI, API, Swiss Ephemeris, and explainable horoscope generation.
Project description
OpAstro Engine (Open Core)
Opastro is a deterministic horoscope engine built for two use cases:
- a developer-friendly Python library
- a high-UX terminal CLI (
opastro)
The open-core repo ships calculations + lightweight built-in meanings. Richer premium narrative packs are available via numerologyapi.com.
One-line promise: Open-source astrology engine for developers: CLI, API, Swiss Ephemeris, and explainable horoscope generation.
5-Minute Quickstart
python3 -m pip install -U opastro
opastro doctor
opastro horoscope --period daily --sign ARIES --target-date 2026-04-03
Terminal Demo
opastro horoscope --period daily --sign ARIES --target-date 2026-04-03 --format markdown
# OPASTRO REPORT
- **Type:** `horoscope` - **Sign:** `ARIES` - **Period:** `daily`
## General (...)
...
Open Core vs Premium
| Product | Includes | Best For |
|---|---|---|
opastro (this repo) |
Open calculations, deterministic engine, lite meanings, installable CLI, local API | Developers building local tools, prototypes, integrations, and transparent workflows |
| numerologyapi.com | Premium narrative depth, richer editorial packs, production-grade premium reading flows | Apps and businesses needing deeper reading content and premium user-facing experiences |
What Is Open Here
- Swiss Ephemeris-based astrology calculations
- Deterministic factor derivation and section scoring
- Built-in lite renderer (no external dataset required)
- FastAPI service endpoints
- Python package + installable CLI
- Test suite covering API, CLI, rendering, caching, and health checks
What Is Not Included
- Private premium meaning dataset and editorial packs
- Premium content production pipeline assets
Requirements
- Python
3.11+
Install (PyPI)
python3 -m pip install opastro
Install (Editable, Contributors)
python3 -m venv .venv
source .venv/bin/activate
python3 -m pip install -e .
CLI
Running with no arguments opens the welcome UI:
opastro
Command Catalog
| Command | Description |
|---|---|
opastro |
Main welcome UI with OPASTRO ASCII banner + quick start |
opastro init |
Interactive onboarding to create/update a default profile |
opastro profile ... |
Manage saved profiles (save, list, show, use) |
opastro welcome |
Show welcome UI explicitly |
opastro catalog |
List periods, sections, signs, and planets |
opastro doctor |
Runtime diagnostics (python path, platform, ephemeris mode) |
opastro horoscope |
Generate standard reports (daily/weekly/monthly/yearly) |
opastro birthday |
Generate birthday-cycle yearly report |
opastro planet |
Generate planet-focused report |
opastro natal |
Generate natal report + wheel chart assets (SVG/PNG/map/PDF) |
opastro explain |
Show why each section line appeared (factor provenance) |
opastro completion --shell ... |
Generate shell completion scripts |
opastro ui |
Launch interactive TUI with section drill-down |
opastro batch |
Multi-sign / multi-date report generation |
opastro serve |
Run local FastAPI app |
Report Flags
--period {daily,weekly,monthly,yearly}(required forhoroscope,planet)--sign ARIES--target-date YYYY-MM-DD--sections general,career,money--birth-date YYYY-MM-DD--birth-time HH:MM--lat <float> --lon <float>--timezone <IANA timezone>--zodiac-system {sidereal,tropical}(default:tropical)--ayanamsa {lahiri,fagan_bradley,krishnamurti,raman,yukteswar}--house-system {placidus,whole_sign,equal,koch}--node-type {true,mean}--tenant-id <id>--json--format {text,json,markdown,html}--export <path>
CLI Examples
# Interactive setup (creates active default profile)
opastro init
# Save profile defaults without prompts
opastro profile save --name work --sign ARIES --format markdown --set-active
# Switch active profile
opastro profile use work
# Explain why lines appeared
opastro explain --kind horoscope --period daily --sign ARIES --target-date 2026-04-03 --format markdown
# Interactive TUI
opastro ui --period daily --sign ARIES --target-date 2026-04-03
# Batch generation
opastro batch --kind horoscope --period daily --signs ARIES,TAURUS --date-from 2026-04-03 --date-to 2026-04-05 --format markdown --export-dir reports/batch
# Daily sign-mode
opastro horoscope --period daily --sign ARIES --target-date 2026-04-03
# Daily personalized (houses + daily_house_focus enabled if time+coords provided)
opastro horoscope \
--period daily \
--target-date 2026-04-03 \
--birth-date 1997-08-17 \
--birth-time 09:30 \
--lat 4.0511 \
--lon 9.7679 \
--timezone Africa/Douala
# Birthday-cycle report
opastro birthday --sign TAURUS --target-date 2026-04-03
# Planet-focused monthly report
opastro planet --period monthly --planet mercury --sign TAURUS --target-date 2026-04-03
# Natal report + premium artifact exports
opastro natal \
--user-name "Dakidarts" \
--birth-date 2004-06-14 \
--birth-time 09:30 \
--lat 4.0511 \
--lon 9.7679 \
--timezone Africa/Douala \
--wheel-svg reports/natal-wheel.svg \
--wheel-png reports/natal-wheel.png \
--house-map reports/natal-house-map.json \
--pdf reports/natal-report.pdf
# Raw JSON output
opastro horoscope --period weekly --sign LEO --json
# Export markdown report
opastro horoscope --period daily --sign ARIES --format markdown --export reports/aries.md
Notes:
- If
--user-nameis omitted, natal personalization falls back to active profile name; if none exists, it falls back toOPASTRO. - Wheel assets include a profile context block (name, birth timestamp, coordinates, timezone, house system, zodiac system, generation timestamp) and a responsive combined symbols legend.
API
Run local API:
opastro serve --host 127.0.0.1 --port 8000 --reload
Or directly:
uvicorn horoscope_engine.main:app --host 127.0.0.1 --port 8000 --reload
Endpoints
GET /healthPOST /horoscopePOST /birthday-horoscopePOST /planet-horoscopePOST /natal-birthchartPOST /natal-birthchart/wheel.svgPOST /natal-birthchart/wheel.pngPOST /natal-birthchart/house-overlayPOST /natal-birthchart/report.pdfGET /metricsPOST /admin/pregenerate
Minimal API Call
curl -X POST http://127.0.0.1:8000/horoscope \
-H "Content-Type: application/json" \
-d '{"period":"daily","sign":"ARIES"}'
Natal Birthchart API Call
curl -X POST http://127.0.0.1:8000/natal-birthchart \
-H "Content-Type: application/json" \
-d '{"birth":{"date":"2004-06-14","time":"09:30","coordinates":{"latitude":4.0511,"longitude":9.7679},"timezone":"Africa/Douala"}}'
Environment Variables
| Variable | Default | Purpose |
|---|---|---|
SE_EPHE_PATH |
auto-detected | Swiss Ephemeris path override |
REDIS_URL |
unset | Enable Redis cache if set |
REDIS_KEY_PREFIX |
"" |
Redis key prefix |
CONTENT_HEALTHCHECK_DISABLE |
0 |
Skip startup content/schema check |
CONTENT_HEALTHCHECK_FAIL_FAST |
0 |
Raise startup error when health check issues are found |
PREGEN_TOKEN |
unset | Protect /admin/pregenerate with X-Admin-Token |
Developer UX Extras
# Diagnose and preview auto-fixes
opastro doctor --fix --dry-run
# Apply auto-fixes (installs editable package + deps)
opastro doctor --fix
# Generate shell completions
opastro completion --shell bash
opastro completion --shell zsh
opastro completion --shell fish
Testing
python3 -m pip install -e ".[dev]"
PYTHONPATH=src python3 -m pytest -q
Build And Publish (PyPI)
# One-time tooling
python3 -m pip install -U build twine
# Clean old artifacts
rm -rf dist build src/*.egg-info
# Build wheel + sdist
python3 -m build
# Validate package metadata/rendering
python3 -m twine check dist/*
# Production upload
python3 -m twine upload dist/*
Docs
Start here: docs/README.md
Python Library Examples
1) Basic Daily Report (Sign Mode)
from datetime import date
from horoscope_engine.config import ServiceConfig
from horoscope_engine.models import HoroscopeRequest, Period
from horoscope_engine.service import HoroscopeService
service = HoroscopeService(ServiceConfig())
response = service.generate(
HoroscopeRequest(
period=Period.DAILY,
sign="ARIES",
target_date=date(2026, 4, 3),
)
)
print(response.report_type.value, response.sign, response.period.value)
for section in response.sections:
print(f"[{section.section.value}] {section.summary}")
2) Personalized Report (Birth + Coordinates)
from datetime import date
from horoscope_engine.config import ServiceConfig
from horoscope_engine.models import BirthData, Coordinates, HoroscopeRequest, Period
from horoscope_engine.service import HoroscopeService
service = HoroscopeService(ServiceConfig())
response = service.generate(
HoroscopeRequest(
period=Period.WEEKLY,
target_date=date(2026, 4, 3),
birth=BirthData(
date=date(1997, 8, 17),
time="09:30",
coordinates=Coordinates(latitude=4.0511, longitude=9.7679),
timezone="Africa/Douala",
),
)
)
print(response.sign)
print(response.data.snapshot.rising_sign)
print(response.data.snapshot.house_cusps)
3) Planet-Focused Report
from datetime import date
from horoscope_engine.config import ServiceConfig
from horoscope_engine.models import Period, PlanetHoroscopeRequest, PlanetName
from horoscope_engine.service import HoroscopeService
service = HoroscopeService(ServiceConfig())
response = service.generate_planet(
PlanetHoroscopeRequest(
period=Period.MONTHLY,
planet=PlanetName.MERCURY,
sign="TAURUS",
target_date=date(2026, 4, 3),
)
)
print(response.report_type.value)
print(response.sections[0].title)
4) JSON Serialization
from datetime import date
from horoscope_engine.config import ServiceConfig
from horoscope_engine.models import HoroscopeRequest, Period
from horoscope_engine.service import HoroscopeService
service = HoroscopeService(ServiceConfig())
payload = service.generate(
HoroscopeRequest(period=Period.DAILY, sign="LEO", target_date=date(2026, 4, 3))
).model_dump(mode="json")
print(payload["report_type"], payload["period"], payload["sign"])
Want Premium Narrative Depth?
Unlock richer editorial readings and premium API access: numerologyapi.com
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