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Accounting and finance ⇄ ERP

Coupa to Epicor ERP integration — real-time, two-way sync

Keep Coupa and Epicor ERP 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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Why teams connect Coupa and Epicor ERP

Keep Coupa and Epicor ERP agreeing on customers, invoices, and balances, whether they split the finance workload or one is replacing the other.

A dedicated finance tool and an ERP end up side by side for practical reasons: a subsidiary runs lighter software than headquarters, billing runs in a specialist system while the enterprise system holds the wider view, or the company is mid-migration and both are live. Whatever the split, the two systems describe overlapping customers and transactions, and that overlap drifts without a live connection.

Stacksync syncs Requisitions, Purchase Orders, Invoices, Suppliers in Coupa with Quotes, AR invoices, Shipments, Bills of materials in Epicor ERP in real time and in both directions. You decide which system wins on which field, and every change made in one is reflected in the other within seconds instead of at the next batch run.

Common use cases

  • 01 Export approved Invoices and their lines from Coupa into an accounting/ERP system to drive the AP pay cycle and GL posting.
  • 02 Push chart-of-accounts segments and cost centers from the ERP into Coupa Accounts so Requisitions and Invoices code to the right GL.
  • 03 Mirror parts, on-hand inventory, and job status into a reporting database for shop-floor dashboards.
  • 04 Keep supplier and purchase order data synced with procurement or AP automation tools.

Common sync patterns

Migration without a hard cutover

When one system is replacing the other, run both in parallel with records matching until the switch is complete.

One customer and vendor master

Where both systems keep records of the same organizations, corrections made in either propagate to the other.

Subsidiary to headquarters

Where Coupa serves a business unit and Epicor ERP is the group system, transactions and customer records roll up continuously, so consolidation starts from live data.

What you can sync between Coupa and Epicor ERP

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.

Coupa objects Epicor ERP objects How this pairing syncs
Purchase Orders PO headers and lines; synced two-way with ERPs so orders raised in Coupa flow to the ledger and status updates flow back on the /purchase_orders resource. Purchase orders Synced with procurement systems and matched against receipts. Same entity on both sides — records pair one-to-one and field-level changes reconcile in both directions.
Suppliers Supplier master records; kept aligned with an ERP vendor master and onboarding tools, synced two-way on the /suppliers resource. Suppliers Vendor masters kept aligned with procurement and AP automation tools. Same entity on both sides — records pair one-to-one and field-level changes reconcile in both directions.
Accounts Chart-of-accounts segments and GL codes; usually mastered in the ERP and written into Coupa so requisitions and invoices code correctly. Customers Master records synced with CRM accounts so sales and the ERP agree on ownership and credit status. Accounts is specific to Coupa and Customers to Epicor ERP — each maps to any object or custom field on the other side.
Contracts Supplier contract records with terms and dates; read out for reporting or created from a CLM system. Parts Item masters that anchor inventory, BOM, and order line syncs. Contracts is specific to Coupa and Parts to Epicor ERP — each maps to any object or custom field on the other side.
Expense Reports Employee expense reports and their lines; exported to AP or ERP for reimbursement and GL posting. Sales orders Created from won CRM opportunities; status and line changes sync back out. Expense Reports is specific to Coupa and Sales orders to Epicor ERP — each maps to any object or custom field on the other side.
Requisitions Employee purchase requests with lines and approval chains; read out to warehouses, or created via the API from upstream intake tools. Jobs Production jobs whose status feeds shop-floor dashboards and delivery-date updates. Requisitions is specific to Coupa and Jobs to Epicor ERP — each maps to any object or custom field on the other side.

How changes propagate between Coupa and Epicor ERP

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.

Coupa Epicor ERP Interval-based propagation

DetectionStacksync polls Coupa for changes on an incremental schedule, reading only records changed since the previous pass. Polling on updated-at and created-at filters (e.g.

DeliveryEach detected change is written to Epicor ERP through its API, with automatic retries and rate-limit backoff.

Epicor ERP Coupa Interval-based propagation

DetectionStacksync polls Epicor ERP for changes on an incremental schedule, reading only records changed since the previous pass. Polling on change-date fields.

DeliveryEach detected change is written to Coupa through its API, with automatic retries and rate-limit backoff.

Rate-limit considerations

  • Coupa: Coupa does not publish explicit rate limits or expose X-RateLimit/Retry-After headers; integrations page 50 records at a time and back off on 429/503 responses.
  • Epicor ERP: Subject to the platform's API rate limits and per-tenant throttling on Kinetic cloud deployments.
What ships with Coupa ⇄ Epicor ERP

Connect Coupa and Epicor ERP for flexible, real-time data sync.

Real-time sync, workflow automation, event queues, EDI, and monitoring, for every Coupa–Epicor ERP connection.

Real-time

Two-way sync

Changes in Coupa or Epicor ERP instantly reflect in both systems. No stale data, no manual imports.

No-code + pro-code

Workflow automation

Trigger automated workflows whenever Coupa or Epicor ERP 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 Coupa or Epicor ERP record.

Observability

Monitoring

Track your Coupa ⇄ Epicor ERP sync health, view errors, and replay failed events in one click.

Trading partners

EDI

Transform legacy EDI complexity into simple database interactions between Coupa and Epicor ERP.

How the Coupa and Epicor ERP connectors work

Coupa

Integration surface
REST Core API (JSON or XML)
Authentication
OAuth 2.0 / OIDC via the client-credentials grant; scopes take the service.object.right form (e.g. core.accounting.read, core.accounting.write). Legacy API keys are being retired (no new keys since R34; API-key auth unsupported from R36). Access tokens last 24 hours.
Change detection
Polling on updated-at and created-at filters (e.g. updated-at[gt]=<timestamp>); Coupa has no native webhook subscriptions, though admins can configure outbound Call Out / external notifications.
Capabilities
read · write
Rate limits
Coupa does not publish explicit rate limits or expose X-RateLimit/Retry-After headers; integrations page 50 records at a time and back off on 429/503 responses.

Epicor ERP

Integration surface
REST API (OData) over Epicor business objects, plus BAQ (Business Activity Query) endpoints
Authentication
API key combined with basic or token authentication, depending on version and deployment
Change detection
Polling on change-date fields; outbound calls can be wired through BPM directives, but there is no standard webhook subscription surface
Capabilities
read · write
Rate limits
Subject to the platform's API rate limits and per-tenant throttling on Kinetic cloud deployments
How it works

How to connect Coupa to Epicor ERP — 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.

  1. 01

    Connect your apps

    Authenticate Coupa and Epicor ERP with each platform's native method — OAuth, API keys, or service accounts — plus secure options like SSH tunneling, IP whitelisting, and VPC peering.

    • OAuth 2.0
    • SSH tunnel
    • VPC peering
    Coupa connected
    Epicor ERP connected
    OAuth 2.0
    SSH tunnel
    SSL certificate
    VPC peering
  2. 02

    Choose tables

    Pick the Coupa and Epicor ERP 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.

    • Standard objects
    • Custom objects
    • Auto-schema
    objects · Coupa ⇄ Epicor ERP
    Customers 12,480
    Sales Orders 8,213
    Invoices 5,902
    Items 1,344
  3. 03

    Map fields

    Fields map automatically even when names and types differ. Stacksync handles transformation and type casting for you, zero configuration required.

    • Auto-map
    • Type casting
    • Transforms
    Coupa Epicor ERP
    Company company_name text
    Email email text
    Amount amount numeric
    Created created_at timestamp
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FAQ

Coupa and Epicor ERP integration FAQ

SECURITY

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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.

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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:

OAuth 2 SSH Tunnelling SSL certificates IP Whitelisting VPN gateway VPC peering and more

Related integrations

Every pair below is a real-time, two-way sync. Search all 505 integrations available for Coupa and Epicor ERP.

Popular · 6 of 505
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