This Spring Boot app authenticates with QuickBooks via OAuth 2.0 (Java SDK), fetches Customers/Items via the Accounting API, and manages Custom Fields using the QuickBooks GraphQL API.

• Custom Fields Operations (UI demo)
  • Create a custom field via GraphQL
  • List existing custom fields via GraphQL
  • Disable a custom field definition via GraphQL
  • Activate a custom field definition via GraphQL
  • Create invoice with a custom field value via REST
  • Deep link to view the created invoice in QBO
  • Create customer with a custom field value via REST
  • Deep link to view the created customer in QBO
  • Direct deep link to the Custom Fields settings page in QBO
• Hybrid Integration
  • REST (Accounting API) for Customers, Items, and Invoices
  • GraphQL for Custom Fields
• OAuth 2.0 (Java SDK)
  • Discovery-based environment handling (sandbox/production)
  • Secure redirect with configurable URI
• Diagnostics
  • Configurable logging for REST and GraphQL requests
  • Inline duplicate-name handling for customer creation (scoped error under the form with input focus)

Availability: Custom Fields GraphQL APIs are currently available in production environments only.

• Spring Boot Web and Thymeleaf
• QuickBooks Java SDKs: ipp-v3-java-devkit, oauth2-platform-api, ipp-v3-java-data (6.7.0)
• JAXB for Java 17 compatibility: javax.xml.bind:jaxb-api, org.glassfish.jaxb:jaxb-runtime
• Jackson Databind
• Spring Session Core
• Spring Boot Starter Test (test scope)

• Java 17 or higher
• Gradle 7.0 or higher
• QuickBooks Developer account and a QuickBooks Online company
• ngrok (for local development)

• Note: Custom Fields GraphQL APIs are currently available in PRODUCTION only (not supported in Sandbox).

• Ensure you connect to a production company when testing these scopes.

• com.intuit.quickbooks.accounting — access accounting data (customers, items, invoices)

• app-foundations.custom-field-definitions — manage custom field definitions (GraphQL)

• app-foundations.custom-field-definitions.read — read custom field definitions (GraphQL)

1. Clone the repository

git clone <repository-url>
cd SampleApp-CustomFields-Java

2. Start ngrok

ngrok http 8080

3. Configure your QuickBooks app

• Visit the Intuit Developer Portal (https://developer.intuit.com/app/developer/myapps)
• Create an app (or use an existing one)
• Enable the scopes above
• Add your redirect URI (e.g., https://your-ngrok-url.ngrok-free.app/callback)

4. Configure application settings

Option A: Use environment variables

export QB_CLIENT_ID=your_client_id
export QB_CLIENT_SECRET=your_client_secret
export QB_REDIRECT_URI=https://your-ngrok-url.ngrok-free.app/callback
export QB_ENVIRONMENT=production   # or sandbox
export QB_GRAPHQL_URL=https://qb.api.intuit.com/graphql
export QB_BASE_URL=https://quickbooks.api.intuit.com
export QB_MINOR_VERSION=75
export QB_SCOPES="com.intuit.quickbooks.accounting,indirect-tax.tax-calculation.quickbooks"

Option B: Use application.yml via the provided template Location: src/main/resources/application.yml.template (reference only)

Copy this template to src/main/resources/application.yml and then edit values:

server:
  port: 8080
  forward-headers-strategy: framework
  servlet:
    session:
      cookie:
        secure: true
        same-site: none

spring:
  application:
    name: quickbooks-sdk-demo
  thymeleaf:
    cache: false
    prefix: classpath:/templates/
    suffix: .html
    
quickbooks:
  # INSTRUCTIONS: Copy this block into application.yml and replace with your credentials
  client-id: ${QB_CLIENT_ID:your_quickbooks_client_id_here}
  client-secret: ${QB_CLIENT_SECRET:your_quickbooks_client_secret_here}
  environment: ${QB_ENVIRONMENT:production}  # Custom Fields GraphQL is production-only
  redirect-uri: ${QB_REDIRECT_URI:https://your-ngrok-url.ngrok-free.app/callback}
  base-url: ${QB_BASE_URL:https://quickbooks.api.intuit.com}
  graphql-url: ${QB_GRAPHQL_URL:https://qb.api.intuit.com/graphql}
  minor-version: ${QB_MINOR_VERSION:75}
  deep-link-template: ${QB_DEEP_LINK_TEMPLATE:https://app.qbo.intuit.com/app/invoice?txnId=%s&companyId=%s}
  customer-deep-link-template: ${QB_CUSTOMER_DEEP_LINK_TEMPLATE:https://app.qbo.intuit.com/app/customerdetail?nameId=%s&companyId=%s}
  custom-fields-deep-link-template: ${QB_CUSTOM_FIELDS_DEEP_LINK_TEMPLATE:https://app.qbo.intuit.com/app/customfields?companyId=%s}
  scopes:
    - com.intuit.quickbooks.accounting
    - app-foundations.custom-field-definitions
    - app-foundations.custom-field-definitions.read

logging:
  level:
    com.quickbooks.demo: DEBUG
    org.springframework.graphql: DEBUG
    org.springframework.web.client.RestTemplate: DEBUG

Notes:

• The live application.yml is intentionally gitignored to protect secrets. Only the .template file is committed as a reference.
• Do not edit the .template file for your environment; create/maintain your own application.yml locally.

5. Run the application

./gradlew bootRun

1. Visit http://localhost:8080
2. Click "Connect to QuickBooks" to authenticate (/qbo-login)
3. After auth, the home page loads Customers and Items from your QBO company
4. Enter a custom field name and click "Create Custom Field" (GraphQL)
5. (Optional) Use "Disable Custom Field" to deactivate an existing custom field definition
6. (Optional) Use "Activate Custom Field" to reactivate a previously disabled custom field definition
7. (Optional) Create a Customer with a custom field value (REST)
   • If a duplicate name is submitted, an inline error appears right under the form and the name field is focused for quick correction
   • Follow the deep links to view the customer or open the Custom Fields settings page directly
8. Select a customer and item, optionally provide a custom field value, and click "Create Invoice" (REST)
9. Follow the deep link to open the invoice in QBO

Step 1 — OAuth connect

Step 2 — Create Custom Field

Step 3 — Disable Custom Field (optional)

Step 4 — Create Invoice

Step 5 — View Custom Fields in QBO

Step 6 — Customer Custom Field

• / — Home page
• /qbo-login — Initiate OAuth flow
• /callback — OAuth callback
• /create_custom_field — Create a custom field (GraphQL)
• /disable_custom_field — Disable a custom field definition (GraphQL)
• /activate_custom_field — Activate a custom field definition (GraphQL)
• /create_invoice — Create invoice with optional custom field (REST)
• /create_customer — Create customer with optional custom field (REST)

• OAuth (SDK)

  • Build auth URL → SDK discovery (OpenID configuration) to determine endpoints
  • Exchange code → POST https://oauth.platform.intuit.com/oauth2/v1/tokens/bearer
  • Refresh token → POST https://oauth.platform.intuit.com/oauth2/v1/tokens/bearer

• Accounting (REST)

  • Get Customers → POST {BASE}/v3/company/{realmId}/query?minorversion={mv} with body Select * from Customer ...
  • Get Items → POST {BASE}/v3/company/{realmId}/query?minorversion={mv} with body Select * from Item ...
  • Create Customer → POST {BASE}/v3/company/{realmId}/customer?minorversion={mv}
  • Create Invoice → POST {BASE}/v3/company/{realmId}/invoice?minorversion={mv}&include=enhancedAllCustomFields
    • Headers: Authorization: Bearer <token>, Content-Type: application/json, Accept: application/json

• Custom Fields (GraphQL)

  • Create Custom Field → POST https://qb.api.intuit.com/graphql (mutation in static/graphql/custom_fields.graphql)
  • List Custom Fields → POST https://qb.api.intuit.com/graphql (query in static/graphql/custom_fields.graphql)

Notes:

• {BASE} is typically https://quickbooks.api.intuit.com (prod) or sandbox host if configured.
• minorversion is configurable in application.yml.

SampleApp-CustomFields-Java/
├── src/main/java/com/quickbooks/demo/
│   ├── Application.java
│   ├── config/
│   │   └── QuickBooksConfig.java
│   ├── controller/
│   │   └── QuickBooksController.java
│   └── service/
│       ├── CustomFieldsService.java
│       ├── QuickBooksApiService.java
│       └── QuickBooksOAuthService.java
├── src/main/resources/
│   ├── application.yml
│   ├── static/graphql/
│   │   ├── custom_fields.graphql
│   │   └── custom_field_variables.json
│   ├── static/css/
│   └── templates/
└── README.md

1. Insufficient scope (GraphQL error: access denied / AUTHORIZATION_DENIED)

• Ensure GraphQL scopes are configured and granted during auth
• If you change scopes, re-authenticate to obtain a new token

2. Invalid client or redirect URI

• Verify Client ID/Secret
• Ensure redirect-uri exactly matches the Developer Portal configuration

3. Environment mismatch

• Ensure environment matches the company you connect to (sandbox vs production)

4. Custom Field Limits

• You may reach business limits for the number of custom fields; use an existing field or contact your admin

This project is licensed under the Apache License 2.0 — see LICENSE.

For support, visit the Intuit Developer Community (https://help.developer.intuit.com/s/) or open an issue in this repository.