ERP API Integration Explained: REST, Webhooks, Auth and Idempotency
A plain-English explanation of ERP API integration: REST APIs, webhooks, authentication methods, idempotency, pagination, rate limits and error handling.
Integration · Productivity
01Data
| Entity | Direction | Notes |
|---|---|---|
| User identity | App → ERP | Google sign-in (OAuth/OpenID Connect). |
| Emails | App → ERP | Logged against partners and deals. |
| Calendar | ⇄ Both | Meetings and activities in sync. |
| Drive files | ⇄ Both | Documents linked to ERP records. |
| Sheets exports | ERP → App | Scheduled data exports for ad-hoc analysis. |
02Use cases
Simplified access and offboarding.
Sales meetings appear in CRM.
Drive folders per customer or project.
03 — Architecture
OAuth clients and, where appropriate, service accounts with domain-wide delegation access Gmail, Calendar and Drive APIs. Push notifications inform the ERP of calendar and Drive changes.
04Reliability
Google OAuth 2.0 with minimal scopes; service accounts restricted by admin console delegation settings.
Quota errors and revoked access detected and logged; users prompted to reauthorise when needed.
Exponential backoff on quota and transient errors, following Google API guidance.
05 — Data mapping
| Google Workspace | ERP |
|---|---|
| Google account | ERP user |
| Gmail thread | Message on record |
| Calendar event | Activity |
| Drive file | Attachment link |
| Sheet | Report export |
06 — Automation
07 — Security
Scopes kept minimal, admin-controlled delegation, and access reviews aligned with Workspace user lifecycle.
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FAQ
Yes, via OAuth sign-in.
Yes, through integration or a Gmail add-on approach, with user consent.
Yes, scheduled exports or live connectors, with BI tools for heavier needs.
Next step
Describe the data that needs to move and who owns it. We will propose a design with error handling and monitoring included.