Real-time
Two-way sync
Changes in Bill or Easypost instantly reflect in both systems. No stale data, no manual imports.
Accounting and finance ⇄ E-commerce
Bill to Easypost integration — real-time, two-way sync
Keep Bill and Easypost in sync without custom scripts. Cut weeks of integration work, eliminate silent data drift, and give your team a single, reliable source of truth.
- SOC 2 and 6 other compliance frameworks
- POC with real engineers in minutes
Adopted by fast-scaling companies moving mission-critical data in real time
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Migrated from Fivetran
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Migrated from Celigo
Why teams connect Bill and Easypost
Turn every Easypost order into clean revenue: Bill and Easypost keep customers, orders, and payment status aligned in real time, in both directions.
Easypost runs the storefront — the catalog, the orders, and the buyers placing them. Bill records the money behind those orders — invoices, revenue, payments, and the ledger the business closes on. The overlap is every customer, order, and product both sides need to agree on, and when that overlap is bridged by CSV export or an overnight batch, finance reconciles against stale numbers while the store quotes prices or stock the books no longer recognize.
Stacksync syncs Chart of Accounts, Bank Accounts, Vendor Credits and Credit Memos, Bills in Bill with Batch, CarrierAccount, Webhook, Shipment in Easypost field by field, in real time, and in both directions. You decide which system owns which fields — an order's totals from Easypost, its paid-or-overdue state from Bill — and Stacksync keeps every copy consistent and resolves conflicts by the rules you set.
The result is one shared record of who bought what and whether it has been paid, so the storefront, support, and the finance team all read from the same current data instead of re-keying it between systems.
Common use cases
- 01 Write Vendors created during ERP onboarding into BILL so new payees are ready to pay without manual re-entry.
- 02 Read Payments and payment status into a reconciliation database once bills are marked paid in BILL.
- 03 Sync CarrierAccount configuration and negotiated rates so shipping options stay consistent across the storefront, ERP, and 3PL systems.
- 04 Pull Shipment, Rate, and Refund records into a warehouse to report shipping cost per carrier and service and reclaim postage on labels that were never scanned.
Common sync patterns
Refunds and credits reconcile
Refunds, cancellations, and credit notes raised in either system update the corresponding record in the other, keeping balances honest on both sides.
Where Easypost originates orders: sales flow into the books
A new or updated order in Easypost creates or updates the matching invoice or revenue record in Bill, so billing and reporting start without re-entry.
Where Bill is the money system of record: payment status on the order
Paid, overdue, and refunded state from Bill lands on the order or account in Easypost, so the store and support see what has actually been collected.
What you can sync between Bill and Easypost
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.
| Bill objects | Easypost objects | How this pairing syncs | |
|---|---|---|---|
| Vendors Payee master records; synced two-way with vendor/supplier tables in an ERP or accounting system so new payees don't have to be re-keyed. | 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. | Vendors is specific to Bill and Tracker to Easypost — each maps to any object or custom field on the other side. | |
| Invoices Accounts-receivable invoices sent to customers; created and read via /v3/invoices to keep billing status aligned with the ERP or CRM. | Batch Bulk shipment processing; create a batch, add or remove shipments, buy all labels at once, and generate a consolidated label or ScanForm for the day's orders. | Invoices is specific to Bill and Batch to Easypost — each maps to any object or custom field on the other side. | |
| Customers AR customer master records; mapped to customer/account records in a CRM or ERP so finance and sales share one view. | CarrierAccount Carrier credentials and settings that control which carriers and negotiated rates are available; create, update, and delete to manage enabled carriers across accounts. | Customers is specific to Bill and CarrierAccount to Easypost — each maps to any object or custom field on the other side. | |
| Payments Outgoing vendor payments and received customer payments; read for reconciliation and created to schedule bill pay. | 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. | Payments is specific to Bill and Webhook to Easypost — each maps to any object or custom field on the other side. | |
| Chart of Accounts GL accounts used to code bills and invoices; typically mastered in the accounting system and written into BILL for consistent coding. | 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. | Chart of Accounts is specific to Bill and Shipment to Easypost — each maps to any object or custom field on the other side. | |
| Bank Accounts Funding and deposit accounts; read to reconcile payments and posted transactions against the ledger. | 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. | Bank Accounts is specific to Bill and Address to Easypost — each maps to any object or custom field on the other side. |
How changes propagate between Bill and Easypost
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.
Bill Easypost Sub-second propagation
DetectionBill notifies Stacksync of record changes through webhook events. Webhook event subscriptions (POST /v3/subscriptions) for bills, vendors, payments, invoices, and bank accounts, with polling on.
DeliveryEach detected change is written to Easypost through its API, with automatic retries and rate-limit backoff.
Easypost Bill 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 written to Bill through its API, with automatic retries and rate-limit backoff.
Rate-limit considerations
- Bill: 20,000 requests per developer key per hour; login (POST /v3/login) capped at 200/hour; maximum 3 concurrent requests per developer key per organization. Spend & Expense API is a separate token at 60 calls/token/minute.
- 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 Bill ⇄ Easypost
Connect Bill and Easypost for flexible, real-time data sync.
Real-time sync, workflow automation, event queues, EDI, and monitoring, for every Bill–Easypost connection.
No-code + pro-code
Workflow automation
Trigger automated workflows whenever Bill or Easypost 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 Bill or Easypost record.
Observability
Monitoring
Track your Bill ⇄ Easypost sync health, view errors, and replay failed events in one click.
Trading partners
EDI
Transform legacy EDI complexity into simple database interactions between Bill and Easypost.
How the Bill and Easypost connectors work
Bill
- Integration surface
- REST/JSON (BILL v3 Connect API)
- Authentication
- Session-based: POST /v3/login with username, password, organizationId, and a developer key (devKey) returns a sessionId that is passed with the devKey as headers on every subsequent call; OAuth is available for partner/embedded apps
- Change detection
- Webhook event subscriptions (POST /v3/subscriptions) for bills, vendors, payments, invoices, and bank accounts, with polling on createdTime/updatedTime list filters as the fallback
- Capabilities
- read · write · webhooks
- Rate limits
- 20,000 requests per developer key per hour; login (POST /v3/login) capped at 200/hour; maximum 3 concurrent requests per developer key per organization. Spend & Expense API is a separate token at 60 calls/token/minute.
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
How it works
How to connect Bill to Easypost — 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 Bill and Easypost with each platform's native method — OAuth, API keys, or service accounts — plus secure options like SSH tunneling, IP whitelisting, and VPC peering.
Bill
connected
Easypost
connected
OAuth 2.0SSH tunnelSSL certificateVPC peering - 02
Choose tables
Pick the Bill and Easypost 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 · Bill ⇄ EasypostCustomers 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.
Bill EasypostCompany company_name textEmail email textAmount amount numericCreated created_at timestamp
FAQ
Bill and Easypost integration FAQ
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Yes. Stacksync provides a managed, real-time two-way integration between Bill and Easypost: authenticate both systems, choose the objects to sync (such as Bill's Vendors and Invoices), map fields visually, and changes propagate both ways in milliseconds — no code required.
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Bill: REST/JSON (BILL v3 Connect API). Authentication: Session-based: POST /v3/login with username, password, organizationId, and a developer key (devKey) returns a sessionId that is passed with the devKey as headers on every subsequent call; OAuth is available for partner/embedded apps. 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. Stacksync manages authentication, retries, and rate limits on both sides.
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Bill: BILL exposes separate AP and AR object sets plus a distinct Spend & Expense API that uses its own token and a lower 60-calls-per-minute limit. Easypost: Rates are generated by EasyPost, not written - you create a Shipment, receive a set of Rate options, then buy against the chosen rate id, and the label (postage_label) and tracking_code come back on the purchased Shipment. Stacksync's field mapping accounts for these differences between Bill and Easypost without custom code.
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Stacksync is SOC 2 Type II and ISO 27001 certified with HIPAA BAA support. Data is encrypted in transit, and a zero-persistent-storage architecture means Bill and Easypost records are not retained after a sync operation.
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Stacksync pricing is usage-based and starts at $1,000/month, including the managed Bill and Easypost connectors, real-time two-way sync, monitoring, and support. That replaces building and maintaining a custom Bill–Easypost integration in-house.
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Yes — Stacksync ships production-grade connectors for both Bill and Easypost. The connectors handle authentication, schema detection, rate limits, and retries; you configure the sync, and Stacksync operates it.
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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