API Docs
v0Public API

Public API

Programmatic access to warehouse operations, inventory management, and shipment lifecycle. Build integrations, automate fulfillment, and sync with your systems.

Get StartedAPI Reference
OAuth 2.0API KeysRESTfulOpenAPI 3.0JSON
API Request
GET /v0/shipments?status=pending&take=5
Authorization: Bearer eyJhbGciOi...

// Response 200
[
  {
    "id": "11",
    "status": "pending",
    "type": "outbound-pickpack",
    "warehouse": { "id": "1", "name": "Main Warehouse" },
    "invoiceId": "5",
    "notes": "Handle with care",
    "cartons": [...]
  }
]

Shipments

Pick & Pack and Small Parcel shipments through the full lifecycle.

Inventory

Products, cartons, and real-time stock levels across all warehouses.

Invoices

Read-only access to invoices, line items, and payment status.

OAuth 2.0

Scoped access tokens with automatic refresh for secure integrations.

Articles

Step-by-step walkthroughs to get you up and running.

Quickstart

Getting Started

Go from zero to your first 3PLGuys API call in under 5 minutes. Set up OAuth credentials, obtain access tokens, and fetch live data.

Shipments

Automating SPD Shipments

End-to-end guide for creating and managing Small Parcel (SPD) shipments via the 3PLGuys API, including label uploads and status tracking.

Inventory

Syncing Inventory

Keep your external systems in sync with 3PLGuys warehouse stock levels. Polling strategies, delta detection, and product catalog management.

Authentication

OAuth Integration Deep Dive

Complete guide to OAuth 2.0 with the 3PLGuys API. Token lifecycle, automatic refresh, scope management, and production security patterns.

Shipments

Automating Pick & Pack Shipments

End-to-end guide for Pick & Pack customer orders via the 3PLGuys API. Draft creation, shipping address, order items, submission, and tracking.

Integrations

Connecting Shopify to 3PLGuys

Integrate your Shopify store with 3PLGuys for automated order fulfillment and real-time inventory sync. Complete guide with code examples.

Shipments

Inbound Receiving & Container Shipments

Track inbound shipments to your 3PLGuys warehouse. Container receiving, small parcel inbound, and inventory replenishment via the API.

Strategy

Multi-Channel Fulfillment with 3PLGuys

Fulfill orders from Shopify, WooCommerce, Amazon, and your own storefront through a single 3PLGuys warehouse. Unified inventory, one API.

Integrations

Connecting WooCommerce to 3PLGuys

Integrate WooCommerce with 3PLGuys for automated order fulfillment and inventory sync. Complete PHP and Node.js examples.

AI & Automation

Building AI-Powered Integrations

Use AI agents, MCP servers, and LLMs to automate 3PLGuys warehouse operations. Build fulfillment bots and inventory assistants.

API Reference

Authentication

OAuth 2.0 flow, tokens, and scopes

Shipments

List, get, and track shipment statuses

Pick & Pack

Create and manage outbound PnP shipments

Small Parcel (SPD)

SPD shipments with label uploads

Inventory

Products, cartons, and warehouse stock

Invoices

Billing, line items, and payment status

Notifications

Unified feed of activity and action items

Warehouses

Warehouse locations and details

OpenAPI Spec

API Explorer, JSON/YAML downloads

Try the Sandbox

Test API endpoints against our sandbox environment without affecting production data. Any Bearer token works, instant responses, full endpoint coverage.

Open Sandbox