Field Service Management Integration API

6-endpoint RESTlet suite connecting field service operations to NetSuite ERP

RESTlet Endpoints

Full

Transaction Lifecycle

OAuth 1.0

Authentication

100%

API Documentation

Integration Insurance / Claims Processing

The Challenge

An insurance/claims processing company ran field service operations in a specialized external platform. All financial transactions (customers, jobs, sales orders, fulfillments, invoices, payments) had to be manually recreated in NetSuite. The two systems were completely disconnected.

The Solution: Complete API Suite

I built a comprehensive RESTlet API that maps the entire transaction lifecycle from field service to ERP.

Technical Architecture

Field Service System

Insurance claims and work orders

Real-Time Sync API

Automatic data transfer

NetSuite Financial Records

Invoices and payments ready to bill

API Design Principles

Principle	Implementation
Upsert by Default	External ID-based matching; create if new, update if exists
Idempotent Operations	Unique ID tracking prevents duplicate records from retries
Comprehensive Validation	JSON structure validation, required field checks, reference validation
Detailed Error Responses	Structured JSON errors with field-level messages and NetSuite record IDs
Environment Portability	SDF script IDs work across sandbox and production

Professional Deliverables

Complete API Reference Documentation

Every endpoint documented with request/response schemas, field mappings, authentication headers, error codes, and example payloads. Versioned and maintained as the integration evolves.

Postman Test Collection

Pre-built Postman collection with environment configurations for both sandbox and production. Includes sample payloads for every endpoint, enabling the external team to test independently.

Value Delivered

System Unification

Complete transaction lifecycle connected: Customer to Job to SO to Fulfillment to Invoice to Payment
Real-time synchronization replaces manual data entry
Single source of truth for financial data
External ID-based matching ensures data integrity
Professional API documentation enables independent integration by external teams

Technologies Used

SuiteScript 2.1 RESTlet (6 Endpoints) OAuth 1.0 N/record N/search N/error JSON Processing External ID Matching Postman Collection Jest Testing

Explore the Source Code

The 6-endpoint RESTlet API with validation, error handling, and idempotent upserts from this project is available as an anonymized, reusable reference implementation with tests.

View on GitHub