Real-time
Two-way sync
Changes in Easypost or Sage 300 instantly reflect in both systems. No stale data, no manual imports.
E-commerce ⇄ ERP
Easypost to Sage 300 integration — real-time, two-way sync
Keep Easypost and Sage 300 in sync without custom scripts. Cut weeks of integration work, eliminate silent data drift, and give your team a single, reliable source of truth.
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Adopted by fast-scaling companies moving mission-critical data in real time
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Why teams connect Easypost and Sage 300
Keep the storefront in step with the back office: Easypost and Sage 300 share products, inventory, and orders in real time, in both directions.
Easypost runs the storefront and takes the orders; Sage 300 owns the item master, the stock on hand, and the finance behind every transaction. The two overlap wherever the same products, customers, and sales matter to both — and when re-keying or an overnight batch is what connects them, the store oversells items it can't ship, quotes prices finance never set, or leaves buyers waiting on status that already changed.
Stacksync syncs Parcel, Rate, Tracker, Batch in Easypost with Purchase Orders, Inventory Items, AR Invoices and Receipts, AR Customers in Sage 300 field by field, in real time, and in both directions. You decide which system owns which fields — stock and pricing from Sage 300, order and customer detail from Easypost — and Stacksync keeps every copy consistent and resolves conflicts by rules you set.
Common use cases
- 01 Create a Tracker for every outbound shipment and stream tracker.updated webhook events into Postgres or a warehouse so support and ops see live delivery status beside order records.
- 02 Verify and normalize customer Addresses through EasyPost before they are saved to the CRM or OMS to cut failed deliveries and carrier address-correction surcharges.
- 03 Replicate GL, AR, and AP detail to a warehouse for consolidated multi-company reporting.
- 04 Keep inventory items and quantities aligned with e-commerce and warehouse systems on a schedule.
Common sync patterns
One product catalog
Where both systems keep item records, SKUs, descriptions, and attributes stay aligned so the store and the back office describe the same product.
Fulfillment and shipment status close the loop
As orders are picked, shipped, or invoiced in Sage 300, tracking and status flow back to Easypost so buyers see accurate updates.
One customer master
Where both systems keep customer records, a correction in either propagates to the other, ending dual maintenance.
What you can sync between Easypost and Sage 300
Representative objects on each side — any object or custom field can map to any target. Schemas are auto-detected; types are converted between the two systems.
| Easypost objects | Sage 300 objects | How this pairing syncs | |
|---|---|---|---|
| Webhook Event subscriptions delivering an Event via HTTP POST on object changes; full CRUD (create, retrieve, list, update, delete) and the mechanism for near-real-time change delivery to Stacksync. | AR Invoices and Receipts Billing and payment records replicated for cash and revenue reporting. | Webhook is specific to Easypost and AR Invoices and Receipts to Sage 300 — each maps to any object or custom field on the other side. | |
| Shipment The central writable object: create with a to/from Address and Parcel, receive Rate options, then buy a label to get postage_label and tracking_code; retrieve and list with cursor pagination. | AR Customers Receivables customer master synced to CRMs and billing tools. | Shipment is specific to Easypost and AR Customers to Sage 300 — each maps to any object or custom field on the other side. | |
| Address Origin and destination locations; create, retrieve, and list, plus address verification (delivery and residential) to normalize and validate addresses before they are saved downstream. | AP Vendors Payables vendor master synced with procurement and payment systems. | Address is specific to Easypost and AP Vendors to Sage 300 — each maps to any object or custom field on the other side. | |
| Parcel Package dimensions and weight (or a predefined_package); created standalone or inline on a Shipment and reused across shipments and batches. | GL Accounts Chart of accounts read for transaction mapping across integrations. | Parcel is specific to Easypost and GL Accounts to Sage 300 — each maps to any object or custom field on the other side. | |
| Rate Carrier service and price options EasyPost generates on a Shipment; read-only - you select a rate id and buy it, you do not create or edit rates directly. | Journal Batches GL entries staged in batches that must be posted; a common write target for external systems. | Rate is specific to Easypost and Journal Batches to Sage 300 — each maps to any object or custom field on the other side. | |
| Tracker Tracking for a shipment by tracking_code and carrier; create a Tracker to begin tracking, read status and tracking_details, and receive tracker.updated events via webhook as the parcel moves. | Order Entry Orders Sales orders written from e-commerce or EDI feeds. | Tracker is specific to Easypost and Order Entry Orders to Sage 300 — each maps to any object or custom field on the other side. |
How changes propagate between Easypost and Sage 300
Each direction of the sync is driven by what the source system can signal and what the destination accepts — detection, delivery, and expected latency below.
Easypost Sage 300 Sub-second propagation
DetectionEasypost notifies Stacksync of record changes through webhook events. Webhooks deliver an Event via HTTP POST on object changes (e.g.
DeliveryEach detected change is applied to Sage 300 as a row-level write, with types converted between the two schemas.
Sage 300 Easypost Interval-based propagation
DetectionStacksync polls Sage 300 for changes on an incremental schedule, reading only records changed since the previous pass. Scheduled polling.
DeliveryEach detected change is written to Easypost through its API, with automatic retries and rate-limit backoff.
Rate-limit considerations
- Easypost: Fixed 5 requests/second on index (list) endpoints plus a dynamic load-based limiter protecting buy and rate operations; exceeding either returns HTTP 429 Too Many Requests.
What ships with Easypost ⇄ Sage 300
Connect Easypost and Sage 300 for flexible, real-time data sync.
Real-time sync, workflow automation, event queues, EDI, and monitoring, for every Easypost–Sage 300 connection.
No-code + pro-code
Workflow automation
Trigger automated workflows whenever Easypost or Sage 300 data changes, update records, fire webhooks, or kick off sequences without brittle API scripts.
At scale
Event queues
Handle millions of events per minute without losing a single Easypost or Sage 300 record.
Observability
Monitoring
Track your Easypost ⇄ Sage 300 sync health, view errors, and replay failed events in one click.
Trading partners
EDI
Transform legacy EDI complexity into simple database interactions between Easypost and Sage 300.
How the Easypost and Sage 300 connectors work
Easypost
- Integration surface
- REST API (EasyPost API v2, https://api.easypost.com/v2)
- Authentication
- HTTP Basic auth with the API key as the username and an empty password (Bearer token also accepted); separate Test and Production keys
- Change detection
- Webhooks deliver an Event via HTTP POST on object changes (e.g. tracker.updated); historical pulls via list/index endpoints using before_id/after_id cursor pagination
- Capabilities
- read · write · webhooks
- Rate limits
- Fixed 5 requests/second on index (list) endpoints plus a dynamic load-based limiter protecting buy and rate operations; exceeding either returns HTTP 429 Too Many Requests
Sage 300
- Integration surface
- Sage 300 Web API (REST) on newer releases; .NET/COM SDK and direct SQL Server access on-prem
- Authentication
- Sage 300 user credentials (Basic auth on the Web API); database credentials for direct SQL reads
- Change detection
- Scheduled polling; batch-oriented modules with no webhook surface
- Capabilities
- read · write
How it works
How to connect Easypost to Sage 300 — three steps, no code
Configure and sync within minutes, no code. Whether you sync 50k or 100M+ records, Stacksync handles the queues, infra, and plumbing. Integrations are non-invasive and need zero setup on your systems.
- 01
Connect your apps
Authenticate Easypost and Sage 300 with each platform's native method — OAuth, API keys, or service accounts — plus secure options like SSH tunneling, IP whitelisting, and VPC peering.
Easypost
connected
Sage 300
connected
OAuth 2.0SSH tunnelSSL certificateVPC peering - 02
Choose tables
Pick the Easypost and Sage 300 objects to sync — Stacksync auto-detects both schemas, including custom fields where the platform exposes them. Sync to existing tables, or let Stacksync create new ones with ideal data types.
objects · Easypost ⇄ Sage 300Customers 12,480Sales Orders 8,213Invoices 5,902Items 1,344 - 03
Map fields
Fields map automatically even when names and types differ. Stacksync handles transformation and type casting for you, zero configuration required.
Easypost Sage 300Company company_name textEmail email textAmount amount numericCreated created_at timestamp
FAQ
Easypost and Sage 300 integration FAQ
-
Yes. Stacksync provides a managed, real-time two-way integration between Easypost and Sage 300: authenticate both systems, choose the objects to sync (such as Easypost's Webhook and Shipment), map fields visually, and changes propagate both ways in milliseconds — no code required.
-
Change detection on Easypost: Webhooks deliver an Event via HTTP POST on object changes (e.g. tracker.updated); historical pulls via list/index endpoints using before_id/after_id cursor pagination. On Sage 300: Scheduled polling; batch-oriented modules with no webhook surface. Each detected change propagates to the other side in milliseconds, with field-level conflict resolution and an inspectable event log.
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On the Easypost side: Parcel, Rate, Tracker, Batch, plus custom fields where Easypost exposes them. On the Sage 300 side: Purchase Orders, Inventory Items, AR Invoices and Receipts, AR Customers. Stacksync auto-detects both schemas and converts types between the two systems.
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Yes. Each object mapping can be bidirectional or restricted to a single direction (both systems accept writes). Read-only mirrors, one-way pushes, and full two-way sync can be mixed in the same integration.
-
Common patterns for Easypost and Sage 300: One product catalog; Fulfillment and shipment status close the loop; One customer master. Where both systems keep item records, SKUs, descriptions, and attributes stay aligned so the store and the back office describe the same product.
-
Easypost: REST API (EasyPost API v2, https://api.easypost.com/v2). Authentication: HTTP Basic auth with the API key as the username and an empty password (Bearer token also accepted); separate Test and Production keys. Sage 300: Sage 300 Web API (REST) on newer releases; .NET/COM SDK and direct SQL Server access on-prem. Authentication: Sage 300 user credentials (Basic auth on the Web API); database credentials for direct SQL reads. Stacksync manages authentication, retries, and rate limits on both sides.
SECURITY
Security teams trust Stacksync
As a data company, we understand the importance of keeping your data secure. Stacksync is built with security best practices to keep your data safe at every layer, and is DPF-certified for US, EU, UK and CH data transfers.
SOC 2 Type II
ISO 27001
HIPAA BAA
GDPR
CCPA
DPF US-EU-UK-CH
→ SECURITY WITH BENEFITS
SSO & SCIM
Let your users access Stacksync from your centralized user management systems. Works with Okta, Azure, Google SSO and more.
Alerts
Immediately get alerted about record syncing issues over email, Slack, PagerDuty and WhatsApp. Resolve issues from a centralized dashboard with retry and revert options.
Secure connection options
Securely connects to your systems with:
Related integrations
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