Nautilus uses EasyPost's unified API for multi-carrier shipping, address verification, and shipment insurance. Useful for engineering teams that want shipping to be a single integration point regardless of which carriers they end up using.
Inventory data, where you need it.
Three things the EasyPost integration does well, that you'd otherwise be doing by hand.
Address verification
Validate shipping addresses against carrier-specific databases before label creation. Catches typos, suite-number errors, and undeliverable addresses before they generate failed deliveries.
Auto-insurance
Auto-insure high-value shipments based on configurable thresholds. Set '$500 declared value triggers $5 of insurance,' Nautilus enforces it. Insurance claims for damaged or lost shipments flow back into Nautilus as cost adjustments.
Customs forms
International customs documentation generates automatically from product-level HS codes, country of origin, and declared value. Forms attach to the label PDF as a single print job.
Bidirectional sync. No manual entry.
Data moves between Nautilus and EasyPost in both directions, near-real-time.
- Pick completions
- Package dimensions
- Address data
- Declared values
- Insurance thresholds
- Rate quotes
- Label PDFs
- Tracking numbers
- Address validation results
- Customs declarations
Four steps to live.
Under 10 minutes for most teams. The full health check takes longer but doesn't block sync.
Connect
Authenticate with one click. Nautilus uses OAuth — no API keys to copy, no credentials to store.
Map
Match your products, locations, and accounts. Nautilus auto-maps by SKU where possible.
Sync
Enable bidirectional sync. Changes in either system reflect in the other within 30 seconds.
Verify
Run the sync health check. Nautilus flags any mismatches before they become problems.
What the integration does, in numbers.
EasyPost questions, answered.
When should I use EasyPost over Shippo or ShipStation?
EasyPost is the right choice when shipping is part of a larger engineering integration (your product has its own ship-from-our-warehouse workflow that you're surfacing in a customer-facing app). The API is documented in a way engineering teams find pleasant, and the abstraction is consistent across carriers. For pure warehouse operations without a custom engineering layer, Shippo or ShipStation are usually simpler.
How is EasyPost's address verification different from carrier-specific verification?
EasyPost cross-references USPS, FedEx, and UPS address databases plus several international postal databases. Carrier-specific verification only checks against one source. The downside: EasyPost address verification costs $0.01 per call. For high-volume operations, we recommend enabling it only on first-time customers and addresses with typo-flag signals.
What about EasyPost's Smart Rate feature?
Supported. Smart Rate predicts delivery date confidence per carrier and service. Nautilus's order routing can factor Smart Rate confidence into carrier selection ('pick the cheapest carrier with > 80% confidence of delivering by Wednesday'). Most customers leave it off; those who turn it on tend to keep it on.
Does this support Latin America carriers (Correios, Estafeta)?
Yes, through EasyPost's Latin America carrier roster. Correios (Brazil), Estafeta (Mexico), and several others are integrated. International postal services for Latin America are EasyPost's strength relative to other US-centric platforms.
See Nautilus + EasyPost running on real data.
30-minute walkthrough with a Nautilus engineer. We'll connect a sandbox of your EasyPost account and show the sync live.