# Appgain OmniChannel Messaging API

**Canonical:** https://apis.io/apis/appgain/appgain-omnichannel-messaging-api/  
**Provider:** Appgain — https://apis.io/providers/appgain/  
**Base URL:** https://api.appgain.io  
**Documentation:** https://apidocs.appgain.io

Appgain OmniChannel Messaging API is one of 3 APIs that [Appgain](https://apis.io/providers/appgain/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Messaging, Push Notifications, Deep Linking, and Event Logging. The published artifact set on APIs.io includes an API reference, authentication docs, and rate-limit docs.

REST API for sending multi-channel campaigns (rich push notifications, email, SMS, web push), creating smart deep links, managing a media library, and logging user events/purchases into the Appgain CDP. Authentication is via an application API key (appApiKey header) scoped to a project ID.

## Machine-readable artifacts (9)

- **APIReference** — https://apidocs.appgain.io
- **Postman** — https://documenter.getpostman.com/view/4679101/T17KeScV?version=latest
- **PostmanCollection** — https://raw.githubusercontent.com/api-evangelist/appgain/refs/heads/main/postman/appgain-omnichannel.postman_collection.json
- **Authentication** — https://raw.githubusercontent.com/api-evangelist/appgain/refs/heads/main/authentication/appgain-authentication.yml
- **Conventions** — https://raw.githubusercontent.com/api-evangelist/appgain/refs/heads/main/conventions/appgain-conventions.yml
- **DataModel** — https://raw.githubusercontent.com/api-evangelist/appgain/refs/heads/main/data-model/appgain-data-model.yml
- **ErrorCatalog** — https://raw.githubusercontent.com/api-evangelist/appgain/refs/heads/main/errors/appgain-problem-types.yml
- **RateLimits** — https://raw.githubusercontent.com/api-evangelist/appgain/refs/heads/main/rate-limits/appgain-rate-limits.yml
- **APIsJSON** — https://raw.githubusercontent.com/api-evangelist/appgain/refs/heads/main/apis.yml

## Other Appgain APIs (2)

- [Appgain Notify API](https://apis.io/apis/appgain/appgain-notify-api/)
- [Appgain Automator API](https://apis.io/apis/appgain/appgain-automator-api/)

## Tags

Messaging, Push Notifications, Deep Linking, Event Logging

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