ERP Integrations2 min read
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.
Service · Data & Integration
ERP API integration engineered for production
An ERP API integration is a contract between two systems that will both change over time. The ERP gets upgraded. The other side adds fields, deprecates endpoints and changes rate limits. Good integrations are designed to survive that.
Overview
What erp api integration involves
We design and build ERP APIs and connectors: custom endpoints that expose ERP data safely to portals and partners, webhook receivers for events from other systems, and connectors to third-party APIs with authentication, retries and monitoring done properly.
01The problem
Where things usually go wrong
01
Exposed internal models
Integrations bound directly to internal database structures break on every upgrade.
02
Weak authentication
Shared admin credentials used by integrations, with no rotation and no audit.
03
No rate limiting
A partner's buggy script floods the ERP with requests and slows it for everyone.
04
Undocumented endpoints
Nobody knows which APIs exist, who uses them or what they return.
02Our approach
How we handle it
We design APIs around stable resource contracts rather than internal tables, version them explicitly, and document them with OpenAPI so consumers know exactly what to expect. Internal changes can then happen without breaking every integration.
Security follows least privilege: each consumer gets its own credentials with only the scopes it needs, tokens are rotated, and every call is logged. Inbound webhooks are verified by signature and processed asynchronously through a queue, so a burst of events cannot overwhelm the ERP.
03Capabilities
What the work covers
01
API design
Resource contracts, versioning strategy and OpenAPI documentation.
02
Custom endpoints
Secure endpoints exposing orders, stock, prices and documents to authorised consumers.
03
Webhook receivers
Signature-verified, queued processing of events from external systems.
04
Third-party connectors
Clients for external APIs with authentication, pagination and rate-limit handling.
05
API gateway setup
Rate limiting, authentication and logging in front of ERP endpoints.
06
Monitoring
Metrics, logs and alerts on errors, latency and volume.
04Technical considerations
Details that decide whether it holds up
01
Authentication
OAuth 2.0 client credentials, scoped API keys or signed requests (HMAC), depending on the consumer.
02
Idempotency keys
Write endpoints accept a client-supplied key so retries never duplicate records.
03
Pagination and filtering
Cursor-based pagination and incremental sync by modification timestamp.
04
Error contracts
Consistent error codes and messages so consumers can distinguish retryable from permanent errors.
05Process
How the engagement runs
- 01
Define
Consumers, use cases, data contracts and security requirements.
- 02
Design
API specification and integration architecture.
- 03
Build
Endpoints, connectors and tests.
- 04
Harden
Load tests, failure tests and security review.
- 05
Publish
Documentation, credentials and monitoring in place.
06Outcomes
What you should expect afterwards
Upgrade resilience
Stable contracts insulate integrations from ERP changes.
Controlled access
Every consumer authenticated, scoped and audited.
Partner-ready
Documented APIs make it easy for customers and suppliers to connect.
Where it applies
Industries and systems we commonly see
Relevant industries
Relevant integrations
Related solutions
Related services
Often delivered alongside
ERP IntegrationConnect your ERP to commerce, CRM, finance and operational systems — and keep it connected.ERP DevelopmentEngineering for ERP platforms: modules, APIs, reports, portals and performance work.Custom ERP DevelopmentPurpose-built ERP software for operations that standard products fit poorly.ERP SupportA named team that knows your configuration, handling issues, questions and small changes.
Insights
Related reading
ERP Integrations2 min read
ERP Integration Guide: Patterns, Data Ownership and Reliability
How to integrate an ERP with eCommerce, CRM, payments and other systems: data ownership, integration patterns, middleware, error handling, monitoring and common failure modes.
FAQ
Frequently asked questions
Should we use the ERP's standard API or build custom endpoints?
Use the standard API for internal integrations where it fits. Build custom endpoints when you need a stable, documented contract for external consumers or business logic that the standard API does not encapsulate.
How do you secure ERP APIs?
Per-consumer credentials with limited scopes, HTTPS everywhere, request signing where appropriate, rate limiting and full audit logging.
Can you build an API for our customers to place orders?
Yes. B2B order APIs, stock and price lookups, and order status endpoints are common requests from distributors and manufacturers.
Next step
Need an ERP API or connector?
Tell us who needs to connect and why. We will design a contract that lasts.