The Saga Pattern, Explained for Carrier Integrations
What the saga pattern is, how compensating transactions work, and a worked carrier-booking example showing exactly what unwinds on failure.
PostNord EDI to API Migration Without Duplicate Labels
Step-by-step guide to moving PostNord bookings from EDI to the OAuth2 Booking API, with an idempotency layer to stop duplicate labels mid-cutover.
Carrier API Deprecation Windows: 6 Vendors Measured
How much warning FedEx, UPS, DHL, USPS, PostNL and GLS actually give before sunsetting an API version, with sourced dates and gaps in days.
What Is AS2? EDI's Transport Layer, Explained
What AS2 actually guarantees for carrier EDI: encryption, MDN receipts and delivery semantics — and how it differs from SFTP, VAN and API transport.
ShipX PL to InPost Global API, Step by Step
A reproducible guide to migrating InPost ShipX PL to the Global API: OAuth 2.1 scopes, PKCE, tracking remapping, and HMAC webhook cutover.
Webhook Signature Schemes Across 10 Shipping APIs
We checked webhook signature methods on 10 shipping/carrier platforms as of October 2026: algorithms, headers, replay windows, and what's undocumented.
Circuit Breakers in Carrier Integration, Explained
What the circuit breaker pattern is, how it differs from retries, and how carrier integration platforms apply it per carrier.
Migrating From GLS UniBox To The REST API
A step-by-step guide to migrating from GLS UniBox to the GLS ShipIT REST API, covering credentials, createParcels, idempotency and ConfirmLabel.
Batch Shipment Limits Across 9 Carrier APIs
Batch and bulk-request limits for FedEx, UPS, DHL, USPS, Shippo, EasyPost, Sendcloud and more — sourced from current docs, dated October 2026.
Dead Letter Queue vs Retry Queue: The Real Difference
Dead letter queue explained for carrier integration: how it differs from a retry queue, with a worked webhook example and FAQ.
Migrating to PostNL Shipment API v4, Step by Step
How to move a production PostNL integration to Shipment API v4: field mapping, barcode-to-reference tracking, key rotation, and rollback steps.
Carrier Integration Software Uptime: 12 SLAs Compared
Published uptime SLAs, marketing claims, and measured data for 12 carrier integration and shipping API platforms, as of September 2026.