# Highnote Webhooks & Event Notifications API

**Canonical:** https://apis.io/apis/highnote/highnote-webhooks-api/  
**Provider:** Highnote — https://apis.io/providers/highnote/  
**Base URL:** https://api.us.highnote.com/graphql  
**Documentation:** https://docs.highnote.com/docs/developers/about-developers

Highnote Webhooks & Event Notifications API is one of 7 APIs that [Highnote](https://apis.io/providers/highnote/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include Webhook, Event Notifications, Event, Subscription, and Real-Time. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, and an API reference.

Register HTTPS webhook notification targets (addWebhookNotificationTarget), activate and deactivate them, and subscribe to event types (addSubscriptionsToNotificationTarget) so Highnote pushes account, card, transaction, transfer, and application events to your systems in real time rather than requiring you to poll the API. Delivered events are also queryable via notificationEvents. All configuration runs through the single GraphQL endpoint; delivery is outbound HTTPS POST to your registered target.

## Machine-readable artifacts (4)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/highnote/refs/heads/main/openapi/highnote-graphql-api-openapi.yml
- **Documentation** — https://docs.highnote.com/docs/developers/about-developers
- **APIReference** — https://docs.highnote.com/docs/api-reference/mutation
- **GraphQL** — https://raw.githubusercontent.com/api-evangelist/highnote/refs/heads/main/graphql/highnote-graphql.md

## Other Highnote APIs (6)

- [Highnote Issuing API](https://apis.io/apis/highnote/highnote-issuing-api/)
- [Highnote Account Holders & Onboarding API](https://apis.io/apis/highnote/highnote-account-holders-api/)
- [Highnote Acquiring API](https://apis.io/apis/highnote/highnote-acquiring-api/)
- [Highnote Money Movement API](https://apis.io/apis/highnote/highnote-money-movement-api/)
- [Highnote Transactions & Disputes API](https://apis.io/apis/highnote/highnote-transactions-api/)
- [Highnote Spend Controls & Collaborative Authorization API](https://apis.io/apis/highnote/highnote-spend-controls-api/)

## Tags

Webhook, Event Notifications, Event, Subscription, Real-Time, GraphQL, United States

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