# API Message Paramaters 

- [API Message Parameters](/api-message-paramaters/api-message-parameters.md): The page will give you all required parameters for sending MT messages via HTTP.
- [Send BINARY SMS (MT) parameters](/api-message-paramaters/send-binary-sms-mt-parameters.md): Learn how to send Binary SMS messages.
- [Receive SMS (MO) parameters](/api-message-paramaters/receive-sms-mo-parameters.md): Examples and documentation on how to receive MO's.
- [Subscription API (RESTFul)](/api-message-paramaters/subscription-api-restful.md): This document will detail how to use our subscription API on our Gateway.
- [Initiate Subscription (API)](/api-message-paramaters/subscription-api-restful/initiate-subscription-api.md): This document will detail how to initiate a subscription via RESTFul api.
- [Validate PIN (API)](/api-message-paramaters/subscription-api-restful/validate-pin-api.md): This document will go over how to validate PIN codes using our RESTFul api.
- [Unsubscribing Users (API)](/api-message-paramaters/subscription-api-restful/unsubscribing-users-api.md): This document aims to detail how to unsubscribe users via our RESTFul api.
- [Checking Subscription Status (API)](/api-message-paramaters/subscription-api-restful/checking-subscription-status-api.md): This document aims to detail how to check subscriptions status of subscribers.
- [Sending Messages To Subscribers (API)](/api-message-paramaters/subscription-api-restful/sending-messages-to-subscribers-api.md): This document aims to detail how to send a message to your subscribers via RESTFul api.
- [Sending Content To Subscribers (API)](/api-message-paramaters/subscription-api-restful/sending-content-to-subscribers-api.md): This document details how to send content/binary messages to your subscribers via RESTful api.
- [Content API (RESTFul)](/api-message-paramaters/content-api-restful.md): This document will detail how to use our content API on our Gateway.
- [Content Types (API)](/api-message-paramaters/content-api-restful/content-types-api.md): This document aims to detail how to request content types via our RESTFul api.
- [Content Categories (API)](/api-message-paramaters/content-api-restful/content-categories-api.md): This document aims to detail how to request content categories via our RESTFul api.
- [Search Content (API)](/api-message-paramaters/content-api-restful/search-content-api.md): This document aims to detail how to search content via RESTFul api.
- [Latest Content Items (API)](/api-message-paramaters/content-api-restful/latest-content-items-api.md): This page aims to document how to
- [Content Items (API)](/api-message-paramaters/content-api-restful/content-items-api.md): This document aims to detail how to get content items via our RESTFul API.