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title: Integration Fundamentals
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canonical_url: https://developer.salesforce.com/docs/commerce/retail-cloud/guide/integration-fundamentals.html
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---
# Integration Fundamentals

Use standards, error handling, and data schemas to implement the specs found in the [Reference](https://developer.salesforce.com/docs/commerce/retail-cloud/references/about-retail-cloud-api/about.html) tab.

## In this section

- [Point of Sale API, SPI, and Webhook Overview](https://developer.salesforce.com/docs/commerce/retail-cloud/guide/retail-cloud-api-spi-webhook-specs.html)
- [SPI Error Handling Codes](https://developer.salesforce.com/docs/commerce/retail-cloud/guide/retail-cloud-spi-error-handling.html)
- [JSON Sample Payloads & Schemas](https://developer.salesforce.com/docs/commerce/retail-cloud/guide/json-sample-payloads-schemas.html)
- [Tender Types Attributes in JSON/XML](https://developer.salesforce.com/docs/commerce/retail-cloud/guide/tender-types-attributes-in-jsonxml.html)
- [Set Up Callback URL for Payment Gateway Integrations](https://developer.salesforce.com/docs/commerce/retail-cloud/guide/callback-url-for-payment-gateway-integrations.html)
- [Monitoring Webhook and SPI Integration Health](https://developer.salesforce.com/docs/commerce/retail-cloud/guide/monitor-webhook-spi-integration-health.html)
- [Configure Monitoring for SPIs and Webhooks in CMS](https://developer.salesforce.com/docs/commerce/retail-cloud/guide/spi-webhook-monitoring.html)

## See also

- [Set Up Salesforce Integrations](https://help.salesforce.com/s/articleView?id=commerce.rt_adv_config_sf_int.htm) in _Salesforce Help_
- [Point of Sale eComm Integration Guide](https://help.salesforce.com/s/articleView?id=commerce.rt_adv_config_pay_gate_integrate_guide.htm) in _Salesforce Help_
- [NetSuite Integration Guide](https://help.salesforce.com/s/articleView?id=commerce.rt_adv_config_3p_int_erp_netsuite_guide.htm) in _Salesforce Help_