Each shipping provider surfaces different carriers and services. Connect them all and see options you would miss with just one, through a single API.
RateShip is a unified shipping API that queries Shippo, EasyPost, and ShipEngine in parallel through a single endpoint, normalizing rates across providers into a consistent response format. Connect your existing provider accounts, make one API call, and get back every available shipping option sorted by price.
Integrate once. Your code stays the same no matter which providers you use.
Shippo
EasyPost
ShipEngine
3 endpoints · 3 schemas · 3 auth methods
RateShip API
1 request · every carrier · every provider
One dashboard. Every shipping provider. Everything you need to compare, purchase, and track.
| Provider | Carrier | Service | Price | Est. Delivery | Action |
|---|---|---|---|---|---|
| Easypost | USUSPS | Ground Advantage | $6.95 | 5 days | |
| Shippo | USUSPS | Priority Mail | $8.42 | 2 days | |
| Shipengine | FEFedEx | Home Delivery | $10.99 | 4 days | |
| Easypost | UPUPS | Ground | $12.47 | 5 days | |
| Shippo | UPUPS | 2nd Day Air | $21.50 | 2 days | |
| Shipengine | UPUPS | Next Day Air | $42.99 | 1 day |
USPS Ground Advantage
Est. 5 days
$6.95
From
John Smith
350 Fifth Avenue
New York, NY 10118
To
Jane Doe
1600 Amphitheatre Pkwy
Mountain View, CA 94043
Package
5 lbs, 16 x 12 x 8 in
Validated Mar 14, 2026
Validated Mar 12, 2026
https://api.mystore.com/webhooks
| Time | Event | Endpoint | Status |
|---|---|---|---|
| 2 min ago | label.purchased | https://api.mystore.com/webhooks | delivered |
| 14 min ago | tracking.updated | https://api.mystore.com/webhooks | delivered |
| 1 hr ago | tracking.delivered | https://hooks.slack.com/... | pending |
Your keys · Your accounts · Your rates
Paste your API keys from Shippo, EasyPost, or ShipEngine. We encrypt and store them securely.
Make one API call. RateShip fans out to all your connected providers in parallel.
Get unified rates back. Pick the best one and buy the label. Charges go to your provider account, not ours.
3
Providers
15+
Carriers
1
API call
<500ms
Avg response
Connect one or all three. Add more as your needs change.
Your API keys are sensitive. We treat them that way.
Provider API keys are encrypted with AES-256 before storage. We never log or return them in API responses.
Label purchases go directly to your provider account. RateShip never handles shipping charges.
The RateShip SDK is open source on npm. Inspect every request before it leaves your code.
Install the SDK and start shipping. View on npm →
npm install rateshipStart free. Upgrade when you need more.
Pro - $5/month
Let your merchants bring whichever shipping provider they already use. Integrate with RateShip once and support Shippo, EasyPost, and ShipEngine without picking one for them.