The Bot Connector REST API allows your bot to send and receive messages to channels configured in the [Bot Framework Developer Portal](https://dev.botframework.com). The Connector service uses industry-standard REST and JSON over HTTPS.
Client libraries for this REST API are available. See below for a list.
Many bots will use both the Bot Connector REST API and the associated [Bot State REST API](/en-us/restapi/state). The
Bot State REST API allows a bot to store and retrieve state associated with users and conversations.
Authentication for both the Bot Connector and Bot State REST APIs is accomplished with JWT Bearer tokens, and is
described in detail in the [Connector Authentication](/en-us/restapi/authentication) document.
# Client Libraries for the Bot Connector REST API
* [Bot Builder for C#](/en-us/csharp/builder/sdkreference/)
* [Bot Builder for Node.js](/en-us/node/builder/overview/)
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