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Products
FlexOps Core Services API
A unified API for warehouses, inventory, orders and carrier integrations—designed for high-volume logistics, multi-site warehouses and systems that require robust, ERP-friendly data models.
Overview
The FlexOps Core Services API gives you a single, consistent API surface to manage the end-to-end shipping lifecycle: warehouses, inventory, orders, shipments, carrier rating, label creation, tracking, and reconciling billed labels across carriers.
Built for scale
Modeling that supports hundreds of warehouses and simultaneous throughput with predictable billing and rate-shopping controls.
Carrier native integrations
Native USPS, UPS and FedEx integrations with rating, manifests and tracking support. We handle carrier contracts and error handling for you.
ERP-friendly data
Data models crafted to map easily to billing, accounting and ERP systems so you can reconcile rapidly and automate billing workflows.
Warehouse-friendly
Warehouse primitives such as locations, bins, pick lists and allocation flows for WMS-driven workflows.
Core capabilities
Warehouse and inventory
- Locations & bins: model any warehouse topology.
- Inventory: multi-location stock, allocations, adjustments, and audit trails.
Orders & fulfillment
- Order ingest & routing: flexible rules and conditions for fulfillment routing.
- Packing flows: support for multiple package formats, pooled shipments, and rate-shopping.
Shipments & carriers
- Label purchase: buy labels across USPS/UPS/FedEx through the API.
- Tracking: real-time status and webhooks for carrier updates.
Billing & analytics
- Billing: per-label billing and predictable pricing models for high-volume operations.
- Analytics: endpoints for usage, cost breakdowns and SLA reporting.
Example API request: Create a shipment
example.http
POST /v1/shipments
Content-Type: application/json
Authorization: Bearer YOUR_API_KEY
{
"orderId": "ORD-123",
"warehouseId": "WH-SF-01",
"carrier": "ups",
"service": "ground",
"packages": [
{ "weightLb": 3.2, "lengthIn": 12, "widthIn": 10, "heightIn": 4 }
]
}Response includes a purchased label, tracking number, and carrier confirmation.
Code samples
Quick examples to create a shipment using cURL and the JavaScript SDK.
cURL
create-shipment.curl
curl -X POST https://api.flexops.io/v1/shipments \
+ -H "Authorization: Bearer YOUR_API_KEY" \
+ -H "Content-Type: application/json" \
+ -d '{
+ "orderId": "ORD-123",
+ "warehouseId": "WH-SF-01",
+ "carrier": "ups",
+ "service": "ground",
+ "packages": [{ "weightLb": 3.2, "lengthIn": 12, "widthIn": 10, "heightIn": 4 }]
+ }'JavaScript (fetch)
create-shipment.js
const resp = await fetch('https://api.flexops.io/v1/shipments', {
+ method: 'POST',
+ headers: {
+ 'Content-Type': 'application/json',
+ 'Authorization': 'Bearer YOUR_API_KEY'
+ },
+ body: JSON.stringify({
+ orderId: 'ORD-123',
+ warehouseId: 'WH-SF-01',
+ carrier: 'ups',
+ service: 'ground',
+ packages: [{ weightLb: 3.2, lengthIn: 12, widthIn: 10, heightIn: 4 }]
+ })
+});
+const data = await resp.json();
+console.log(data);Pricing
Simple, predictable pricing designed for high-volume operations.
Developer (Sandbox)
Free sandbox for development and testing. Quotas and sample data included.
- Rate limits for sandbox use
- Free test labels
Production (Standard)
Per-label pricing with volume discounts for growing operations.
- Per-label billing
- Discounted tiers for monthly volume
Enterprise
Custom SLAs, SSO, and enterprise billing contracts.
- Dedicated support
- Custom rate contracts & settlement
Performance & scale guarantees
- Throughput: Designed to scale — support for thousands of labels per minute with horizontal autoscaling.
- Latency: Typical rates and label responses are sub-second for cacheable operations; label purchases involve carrier latency and are usually under 2-3s.
- High availability: Regions with redundant carriers and fault-tolerant services for critical workflows.
- SLA & support: Enterprise plans have SLA options and dedicated technical account management for onboarding & support.
SDKs & developer resources
We provide SDKs and sample code for common languages; the documentation includes comprehensive examples and code snippets.