python-mytnb

A Python library to interface with the myTNB (Tenaga Nasional Berhad) API for electricity account management and usage monitoring in Malaysia.

Installation

uv add python-mytnb

Or with pip:

pip install python-mytnb

Quick Start

import asyncio
from mytnb import MyTNBClient

async def main():
    client = await MyTNBClient.login("user@example.com", "your-password")

    async with client:
        # Auto-discover linked accounts
        accounts = await client.get_customer_accounts()
        for acc in accounts:
            print(f"{acc.account_number} — {acc.owner_name} (SMR: {acc.is_smart_meter})")

        # Get smart meter usage & billing history
        usage = await client.get_account_usage_smart("220123456789")

        # Monthly billing breakdown
        for month in usage.by_month.months:
            print(f"{month.month} {month.year}: {month.usage_total} kWh — RM {month.amount_total}")

        # Bill history, payment history & due amount
        history = await client.get_bill_history("220123456789")
        payments = await client.get_payment_history("220123456789")
        due = await client.get_account_due_amount("220123456789")

        # Most account-scoped methods also accept a CustomerAccount directly
        # (is_owner and account_type are derived automatically)
        for acc in accounts:
            if acc.is_smart_meter:
                usage = await client.get_account_usage_smart(acc)

asyncio.run(main())

CLI

The mytnb command-line tool requires the optional cli extra (it pulls in click and rich, which the library itself does not need). If you installed without it, mytnb (or python -m mytnb) will fail to start:

pip install "python-mytnb[cli]"

Pass credentials directly:

mytnb --email user@example.com --password yourpass usage 220123456789

Or via environment variables:

export MYTNB_EMAIL=user@example.com
export MYTNB_PASSWORD=yourpass
mytnb usage 220123456789

All commands:

mytnb login                                  # Test login, show user info
mytnb accounts                               # List all linked accounts (auto-discovery)
mytnb accounts --json                        # Account list as JSON
mytnb usage <account>                        # Monthly usage & billing summary
mytnb usage --daily <account>                # Daily usage breakdown
mytnb usage --json <account>                 # Full usage data as JSON
mytnb current-usage <account>                # Simplified current usage summary
mytnb due-amount <account>                   # Outstanding balance
mytnb bill-history <account>                 # Bill history (bills issued)
mytnb payment-history <account>              # Bill & payment history

Global options: --debug for full tracebacks, --version.

Use a config file instead of flags (--config <path>, mytnb.json, or ~/.config/mytnb/config.json):

mytnb init-config   # Generate a starter config file

API Architecture

myTNB uses two API backends, both handled transparently by this library:

Backend	Domain	Auth	Used for
REST	api.mytnb.com.my	JWT + API key	Bill eligibility, eligibility icons
AWS Gateway	api.mytnb.com.my/core/api	Encrypted payloads (AES-256-CBC + RSA-OAEP)	Account listing (auto-discovery)
Legacy ASMX	mytnbapp.tnb.com.my	Encrypted payloads (AES-256-CBC + RSA-OAEP)	Usage data, billing, services

Request encryption for the ASMX API is automatic — just pass plaintext parameters.

Data Models

Model	Description
CustomerAccount	Linked account: number, owner, address, SMR status
AccountUsage	Full usage response: metrics, monthly and daily data
UsageMetric	Current/average usage (kWh)
CostMetric	Current/projected cost (RM)
BillingMonth	Monthly billing record with tariff blocks
DailyUsage	Daily consumption and cost
TariffBlock	Tariff pricing block details
BillHistoryEntry	Single bill issued (date, amount, billing number)
PaymentHistoryEntry	Bill or payment entry with type, method, reference
AccountDueAmount	Outstanding balance and due date
SMRAccount	Smart Meter Reading eligibility status
BREligibility	Bill rendering opt-in status

Geographic Restrictions

The myTNB API only accepts connections from Malaysian IP addresses and blocks most VPN services. If you get a GeoBlockedError (HTTP 403), make sure you are connecting from a Malaysian network without a VPN.

Error Handling

from mytnb.exceptions import MyTNBError, APIError, AuthenticationError, GeoBlockedError

try:
    client = await MyTNBClient.login("user@example.com", "password")
    async with client:
        usage = await client.get_account_usage_smart("220123456789")
except GeoBlockedError:
    print("Blocked — connect from a Malaysian IP without VPN")
except AuthenticationError:
    print("Invalid email or password")
except APIError as e:
    print(f"API error {e.error_code}: {e.display_message}")
except MyTNBError as e:
    print(f"Error: {e}")

Development

uv sync --extra dev
uv run pytest
uv run pylint src/mytnb/

License

MIT