Product
How to Choose a Package Tracking API: AfterShip, 17TRACK, EasyPost, and the Rest
A practical framework for choosing a package tracking API: tracking-only vs. full post-purchase platforms, per-lookup pricing, carrier coverage, webhooks, and data shape.
Choosing a package tracking API is harder than it looks because the category is not one thing. AfterShip is a post-purchase platform. EasyPost and ShipEngine are shipping APIs that also track. 17TRACK is a consumer aggregator with a business API. They solve overlapping problems in different ways, and picking the wrong shape means paying for machinery you do not use.
This guide gives you a decision framework: what you actually need, how pricing really works, and the concrete questions to ask before you commit.
Decide what you are actually buying
Tracking providers fall into three shapes. Post-purchase platforms such as AfterShip wrap tracking in branded pages, notifications, and returns. Shipping APIs such as EasyPost, ShipEngine, and Shippo sell labels and rates and include tracking as a secondary feature. Tracking-focused APIs do one thing: turn a tracking number into normalized status and events.
The shape matters because it drives pricing and integration effort. A platform is powerful but asks you to adopt its whole customer experience. A shipping API is great if you also buy labels, but its tracking is one line item in a broader contract. A focused tracking API is the lightest integration when you already have your own storefront and only need the data.
Watch the per-lookup math, not the headline price
Tracking pricing is a volume game. A flat monthly lookup allowance plus tiered plans is predictable; metered per-call pricing scales with every refresh and every background poll. A store that refreshes each shipment several times a day can blow through a cheap-looking per-call rate quickly.
The questions to ask: is there a free tier, how is a lookup counted, is a cached response charged as a lookup, and what happens when you cross a plan boundary. Predictability usually beats a low sticker price once volume is real.
Carrier coverage is not reliability
A long carrier list sounds impressive but only matters for the carriers you actually ship. More important is whether a provider detects the carrier automatically, how it handles ambiguous numeric formats like FedEx and DHL, and what it returns when a source has no usable data.
Ask for the failure behavior: does an unavailable lookup return a clean error, or a silent empty result that looks like a successful track? A serious API distinguishes no-new-scan from lookup-failed, and tells you when a result is cached.
Webhooks and data shape decide your integration cost
A normalized response — consistent statuses like pending, in_transit, delivered, and exception, plus dated events — is what makes a status page cheap to build. Raw carrier text forces you to write and maintain a translation layer forever.
Then check the webhook story: signed payloads, retries, event ids for deduplication, and the ability to select which events you receive. The quality of the webhook loop predicts how much operational pain you inherit.
A short evaluation checklist
Before you commit: confirm the provider's shape matches your need (tracking-only vs. platform vs. shipping), model one month of real lookups against pricing, send a test tracking number across your top five carriers, and deliberately break a webhook to watch the retry and signature behavior.
If you only need tracking data — for a status page, a support dashboard, or notifications — a focused tracking API with a free tier and normalized events is usually the smallest, cheapest way to start.
Useful next steps
Build tracking into your product
Create a Trace account, generate an API key, and test package tracking from the dashboard.