karrio 2026.1.24

Multi-carrier shipping API integration with python

karrio is a multi-carrier shipping SDK.

The key features are:

• Unified API: A standardized set of models representing the common shipping data (Address, Parcel, Shipment...)
• Intuitive API: A library that abstracts and unifies the typical shipping API services (Rating, Shipping, Tracking...)
• Multi-carrier: Integrate karrio once and connect to multiple shipping carrier APIs
• Custom carrier: A framework to integrate a shipping carrier services within hours instead of months

Requirements

Python 3.11+

Installation

# install karrio core
pip install karrio

# eg: install the karrio canadapost extention
pip install karrio.canadapost

Additional carrier extensions

• karrio.aramex
• karrio.australiapost
• karrio.canadapost
• karrio.canpar
• karrio.dhl-express
• karrio.dhl-universal
• karrio.dicom
• karrio.fedex
• karrio.purolator
• karrio.royalmail
• karrio.sendle
• karrio.sf-express
• karrio.tnt
• karrio.ups
• karrio.usps
• karrio.usps-international
• karrio.yanwen
• karrio.yunexpress

Usage

Rates Fetching

• Fetch shipping rates

import karrio.sdk as karrio
from karrio.core.models import Address, Parcel, RateRequest
from karrio.mappers.canadapost.settings import Settings


# Initialize a carrier gateway
canadapost = karrio.gateway["canadapost"].create(
    Settings(
        username="6e93d53968881714",
        password="0bfa9fcb9853d1f51ee57a",
        customer_number="2004381",
        contract_id="42708517",
        test=True
    )
)

# Fetching shipment rates

# Provide the shipper's address
shipper = Address(
    postal_code="V6M2V9",
    city="Vancouver",
    country_code="CA",
    state_code="BC",
    address_line1="5840 Oak St"
)

# Provide the recipient's address
recipient = Address(
    postal_code="E1C4Z8",
    city="Moncton",
    country_code="CA",
    state_code="NB",
    residential=False,
    address_line1="125 Church St"
)

# Specify your package dimensions and weight
parcel = Parcel(
    height=3.0,
    length=6.0,
    width=3.0,
    weight=0.5,
    weight_unit='KG',
    dimension_unit='CM'
)

# Prepare a rate request
rate_request = RateRequest(
    shipper=shipper,
    recipient=recipient,
    parcels=[parcel],
    services=["canadapost_xpresspost"],
)

# Send a rate request using a carrier gateway
response = karrio.Rating.fetch(rate_request).from_(canadapost)

# Parse the returned response
rates, messages = response.parse()

print(rates)
# [
#     RateDetails(
#         carrier_name="canadapost",
#         carrier_id="canadapost",
#         currency="CAD",
#         transit_days=2,
#         service="canadapost_xpresspost",
#         discount=1.38,
#         base_charge=12.26,
#         total_charge=13.64,
#         duties_and_taxes=0.0,
#         extra_charges=[
#             ChargeDetails(name="Automation discount", amount=-0.37, currency="CAD"),
#             ChargeDetails(name="Fuel surcharge", amount=1.75, currency="CAD"),
#         ],
#         meta=None,
#         id=None,
#     )
# ]

Resources

• Documentation
• Community Discussions
• Issue Tracker
• Blog

Join us on Discord