Canada Post Shipping and Mailing REST API
Canada Post shipping and mailing REST API for Canadian e-commerce merchants, retailers, and logistics providers to rate, create, and manifest shipments, generate labels, track parcels, and access pickup scheduling across Canada — enabling automated domestic and international parcel shipping, returns management, and postage calculation through Canada Post's national postal network serving 17+ million addresses. Enables AI agents to manage rate shopping for Canadian domestic and international postage calculation automation, handle shipment creation for Canada Post parcel booking automation, access label generation for shipping label and manifest production automation, retrieve tracking for Canadian parcel status monitoring automation, manage pickup for parcel collection scheduling automation, handle return for prepaid return label creation automation, access address for Canadian address validation and postal code lookup automation, retrieve customs for cross-border HS code and declaration automation, manage redirect for parcel address change and hold for pickup automation, and integrate Canada Post with Shopify, WooCommerce, and ERP for Canadian e-commerce fulfillment automation.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
Crown Corporation. PIPEDA. Basic Auth. CA. Shipment and address data.
⚡ Reliability
Best When
A Canadian e-commerce merchant, marketplace, or logistics provider wanting AI agents to automate parcel rating, shipment creation, label generation, and tracking through Canada Post's national network covering all Canadian provinces and territories.
Avoid When
CONTRACT ACCOUNT REQUIRED: Canada Post shipping API requires Solutions for Small Business or Commercial contract; automated open developer access assumption creates no_shipping_capability without contract; automated must establish Canada Post business account. XML OR REST AVAILABLE: Canada Post API offers both XML (legacy) and REST; automated REST-only assumption creates integration issues with partners using legacy XML; automated should verify which API version the integration requires. MANIFEST REQUIRED FOR COMMERCIAL: Commercial shipments require manifest/transmit step before pickup; automated label-only assumption creates unmanifested parcel rejection; automated must call transmit/manifest endpoint after creating shipments. FRENCH BILINGUAL REQUIREMENTS: Canada Post serves both English and French Canada; automated English-only label assumption creates non-compliant labels in Quebec; automated must generate bilingual labels for Quebec recipients.
Use Cases
- • Rating and creating domestic Canadian shipments for e-commerce fulfillment automation agents
- • Generating shipping labels and manifests for high-volume parcel processing automation agents
- • Tracking Canadian parcel delivery status for customer notification automation agents
- • Creating prepaid return labels for Canadian e-commerce reverse logistics automation agents
Not For
- • Non-Canadian domestic shipping (Canada Post covers Canada; international requires DHL/FedEx for non-CA)
- • Same-day delivery (Canada Post is standard postal, not on-demand courier)
- • Heavy freight (Canada Post handles parcels up to 30kg, not pallets or freight)
Interface
Authentication
Canada Post uses HTTP Basic Auth for shipping REST API. REST API with XML and JSON. Ottawa, Ontario HQ. Crown Corporation (100% government-owned). Products: Expedited Parcel, Xpresspost, Priority, Regular Parcel, Lettermail. Coverage: 17M+ addresses, 6,200+ retail locations. SDKs: None official. Serves all Canadian provinces/territories. Bilingual (EN/FR). Competes with Purolator (subsidiary), FedEx, and UPS for Canadian parcel delivery.
Pricing
Ottawa ON. Crown Corporation Canada. Per-shipment pricing. 17M+ CA addresses. Bilingual EN/FR.
Agent Metadata
Known Gotchas
- ⚠ MANIFEST IS MANDATORY: Canada Post commercial shipments require manifest/transmit call after label creation; automated single-step shipping assumption creates parcel_not_manifested rejection at pickup; automated must call transmit endpoint to complete shipment workflow
- ⚠ BASIC AUTH WITH CONTRACT CREDENTIALS: Canada Post API uses HTTP Basic Auth with contract-specific username/password; automated modern auth assumption creates auth_failure for OAuth-expecting integrations; automated must use Basic Auth headers with Canada Post contract credentials
- ⚠ FRENCH BILINGUAL LABELS REQUIRED IN QUEBEC: Canada Post labels for Quebec addresses require French content; automated English-only label assumption creates non-compliant labels; automated must set language parameter for bilingual label generation
- ⚠ POSTAL CODE FORMAT IS CRITICAL: Canadian postal codes must follow A1A 1A1 format; automated free-form postal assumption creates invalid_postal_code; automated must validate Canadian postal code format before rating or shipment creation
- ⚠ RETURN TO SENDER REQUIRES SEPARATE FLOW: Canada Post returns require separate prepaid return shipment creation; automated automatic return assumption creates no_return_label; automated must create return shipment explicitly with return service code
Alternatives
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Scores are editorial opinions as of 2026-03-07.