# ADP Event Notifications API

**Canonical:** https://apis.io/apis/adp/event-notifications-api/  
**Provider:** ADP — https://apis.io/providers/adp/  
**Base URL:** https://api.adp.com  
**Documentation:** https://developers.adp.com/getting-started/key-concepts/adp-event-apis-and-event-notification-guide

ADP Event Notifications API is one of 15 APIs that [ADP](https://apis.io/providers/adp/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Event, Webhook, Event Notifications, Change Data Capture, and Integration. The published artifact set on APIs.io includes API documentation.

ADP's change-data-capture surface. When data changes in an ADP product ADP generates an event notification and delivers it either into the subscriber's FIFO message queue, drained with GET/DELETE /core/v1/event-notification-messages, or — since October 2025 — by POSTing it to a partner-hosted webhook endpoint signed with an HMAC-SHA256 adpx-messageauthentication header. Events must be subscribed per application; an unsubscribed event is never delivered.

## Machine-readable artifacts (3)

- **Documentation** — https://developers.adp.com/getting-started/key-concepts/adp-event-apis-and-event-notification-guide
- **Webhooks** — https://raw.githubusercontent.com/api-evangelist/adp/refs/heads/main/asyncapi/adp-event-notifications-webhooks.yml
- **Portal** — https://developers.adp.com

## Other ADP APIs (12)

- [ADP Embedded Payroll API](https://apis.io/apis/adp/adp-embedded-payroll-api/)
- [ADP Benefits Administration API](https://apis.io/apis/adp/adp-benefits-api/)
- [ADP Organizations API](https://apis.io/apis/adp/adp-organizations-api/)
- [ADP PayrollInstructions API](https://apis.io/apis/adp/adp-payrollinstructions-api/)
- [ADP PayrollOutputs API](https://apis.io/apis/adp/adp-payrolloutputs-api/)
- [ADP Workers API](https://apis.io/apis/adp/adp-workers-api/)
- [ADP Payroll API](https://apis.io/apis/adp/payroll-api/)
- [ADP Worker Demographics API](https://apis.io/apis/adp/worker-api/)
- [ADP Time and Labor API](https://apis.io/apis/adp/time-labor-api/)
- [ADP Benefits API](https://apis.io/apis/adp/benefits-api/)
- [ADP Talent Management API](https://apis.io/apis/adp/talent-api/)
- [ADP Recruiting API](https://apis.io/apis/adp/recruiting-api/)

## Tags

Event, Webhook, Event Notifications, Change Data Capture, Integration

---

Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/adp/event-notifications-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/adp/.