myPyllant
A Python library to interact with the API behind the myVAILLANT app
Decision gist · record as of 2026-08-14
Yes, if you own a Vaillant system and need programmatic control or data export. The library is actively maintained, has low install friction, carries no security vulnerabilities, and is permissively licensed. The main caveat is that it reverse-engineers an undocumented API, so Vaillant could break it at any time; the developers explicitly disclaim responsibility for device damage. Test thoroughly in a non-critical environment first.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Requires Python 3.10 or later.
- On Windows and systems without a timezone database, also install tzdata.
- Low friction installation with a pure-Python wheel.
License · maintenance · safety
permissive license (permissive) — Licensed under MIT (permissive), allowing commercial and private use with minimal restrictions.
last release 2026-07-22 (23 days) · last repo commit 2026-08-02 · 89 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 125,066 downloads/mo, #11,838 on PyPI
Alternatives
Verify before relying
pip install myPyllant
import asyncio
from myPyllant.api import MyPyllantAPI
async def main():
async with MyPyllantAPI(user, password, brand, country) as api:
async for system in api.get_systems():
print(system)
asyncio.run(main())- Whether the library works reliably with all branded variants (MiGo, Glow-worm) or only certain configurations.
- API stability and rate limits when making frequent requests to the myVAILLANT backend.
- Whether account credentials are safely handled and what security practices are recommended.
What it is and what it does
myPyllant is an async Python client for the undocumented myVAILLANT API, letting you programmatically control and query Vaillant heating systems and their branded variants (MiGo, Glow-worm). It wraps aiohttp and pydantic to handle authentication, system discovery, and device operations like temperature setpoints, holiday modes, and hot water boosts. The library is reverse-engineered from the official app and not affiliated with Vaillant; the developers disclaim responsibility for device damage.
You can use it as a Python library in async code, or invoke it as a CLI tool to export system data and energy reports. It requires Python 3.10 and handles timezone-aware operations automatically. The package is actively maintained, with a small but engaged community and integration into Home Assistant.
Use it for
- Export system configuration and historical data from your Vaillant heating setup for analysis or backup.
- Automate temperature adjustments and holiday schedules programmatically from a home automation platform.
- Generate annual energy reports for each heat generator in your system.
- Monitor and control domestic hot water boost and setpoint temperature remotely.
- Build a custom Home Assistant integration or other home automation bridge to Vaillant devices.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes, if you own a Vaillant system and need programmatic control or data export.
The library is actively maintained, has low install friction, carries no security vulnerabilities, and is permissively licensed. The main caveat is that it reverse-engineers an undocumented API, so Vaillant could break it at any time; the developers explicitly disclaim responsibility for device damage. Test thoroughly in a non-critical environment first.
Install
mypyllant on PyPI
Before you install
Low friction installation with a pure-Python wheel. The package is actively maintained with a recent release (23 days old) and steady repository activity. Requires Python 3.10 or later.
Requires Python 3.10 or later. On Windows and systems without a timezone database, also install tzdata.
License in practice
Licensed under MIT (permissive), allowing commercial and private use with minimal restrictions.
Quickstart
pip install myPyllant
import asyncio
from myPyllant.api import MyPyllantAPI
async def main():
async with MyPyllantAPI(user, password, brand, country) as api:
async for system in api.get_systems():
print(system)
asyncio.run(main())Verify before relying
- Whether the library works reliably with all branded variants (MiGo, Glow-worm) or only certain configurations.
- API stability and rate limits when making frequent requests to the myVAILLANT backend.
- Whether account credentials are safely handled and what security practices are recommended.
Package facts
| License | permissive license permissive |
| Python support | Supports the current Python release >=3.10 |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | 2 packagesaiohttppydantic |
| Maintenance | Actively maintained 23 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 125,066 / month, #11,838 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | License :: OSI Approved :: MIT LicenseOperating System :: OS IndependentProgramming Language :: Python :: 3 |
Evidence: mypyllant-0.9.18-py3-none-any.whl
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