# Justt Webhook Events

**Canonical:** https://apis.io/apis/justt/webhook-events/  
**Provider:** Justt — https://apis.io/providers/justt/  
**Base URL:** https://api.justt.ai/v1  
**Documentation:** https://developers.justt.ai/docs/webhook-introduction

Justt Webhook Events is one of 3 APIs that [Justt](https://apis.io/providers/justt/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include Webhooks, Events, and Chargebacks. The published artifact set on APIs.io includes an OpenAPI specification and API documentation.

OpenAPI 3.1 specification of the eleven webhook events Justt sends to merchant endpoints — chargeback created/updated/status-updated, evidence submitted, chargeback accepted, pre-chargeback alert received/refund succeeded/refund failed/transaction matched, and CRM subscription cancellation success/failure. Payloads are signed HMAC-SHA256 and delivered with svix signature headers.

## Machine-readable artifacts (3)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/justt/refs/heads/main/asyncapi/justt-webhook-events-openapi-original.json
- **Webhooks** — https://raw.githubusercontent.com/api-evangelist/justt/refs/heads/main/asyncapi/justt-webhook-events.yml
- **Documentation** — https://developers.justt.ai/docs/webhook-events-event-types

## Other Justt APIs (2)

- [Justt REST API](https://apis.io/apis/justt/rest-api/)
- [Justt Pre-Chargeback Alerts API](https://apis.io/apis/justt/pre-chargeback-alerts/)

## Tags

Webhooks, Events, Chargebacks

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