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 · Documents
01Data
| Entity | Direction | Notes |
|---|---|---|
| Envelopes | ERP → App | Documents and recipients sent from ERP records. |
| Envelope status | App → ERP | Sent, viewed, signed and declined statuses updated. |
| Signed documents | App → ERP | Completed PDFs and certificates attached. |
| Template fields | ERP → App | Merge fields filled from ERP data. |
02Use cases
Signed quote confirms the sales order.
Agreements tracked with renewal dates.
HR documents signed and filed.
03 — Architecture
Envelopes are created via the DocuSign eSignature REST API using templates with merge fields. DocuSign Connect webhooks report status changes, verified with HMAC, and trigger ERP updates.
04Reliability
OAuth 2.0 JWT grant with an integration key and RSA keypair, impersonating a dedicated sender with user consent.
Failed envelope creation (invalid recipients, template errors) reported on the record; Connect failures logged.
Connect deliveries are retried by DocuSign; our endpoint is idempotent by envelope ID and event.
05 — Data mapping
| DocuSign | ERP |
|---|---|
| ERP record (quote/contract) | Envelope |
| Partner contact | Recipient |
| ERP fields | Template tabs |
| Envelope status | Record state |
| Completed documents | Attachments |
06 — Automation
07 — Security
Private keys stored securely, Connect messages verified, and signed documents retained according to policy.
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FAQ
Yes, and the signed status can confirm the order automatically.
Not always. Built-in e-sign covers many needs; DocuSign helps when it's already your standard or required by policy.
Attached to the ERP record and optionally a document repository.
Next step
Tell us what you want to automate. We will design a reliable integration with monitoring built in.