Silent Echo SDK

Use the Silent Echo SDK to build UIs and bots that interact with Alexa via text.

Check out our first example project to use it - SilentEchoBot!
Add SilentEcho to your Slack - try it here.

The SDK can be used via NodeJS or HTTP.

NodeJS SDK

Installation

Add the Silent Echo SDK to your project:

npm install silent-echo-sdk --save

Get your token:
https://silentecho.bespoken.io/link_account?token=true

Save the token that is generated - you will use it in the step below.

Sending a Message

Here is a simple example in Javascript:

const echoSDK = require("silent-echo-sdk");
const silentEcho = new echoSDK.SilentEcho("<PUT_YOUR_TOKEN_HERE>");
silentEcho.message(message).then((result) => {
    console.log("Reply Transcript: " + result.transcript);
    console.log("Reply Audio: " + result.transcript_audio_url);
});

Result Payload

Here is the full result payload:

export interface ISilentResult {
    card: ICard | null;
    debug?: {
        rawJSON: any;
    };
    sessionTimeout: number;
    streamURL: string | null;
    transcript: string;
    transcriptAudioURL: string;
}

export interface ICard {
    imageURL: string | null;
    mainTitle: string | null;
    subTitle: string | null;
    textField: string;
    type: string;
}

HTTP SDK

The SilentEcho service can also be called directly via HTTP.

Pre-Requisites

Get a SilentEcho Token:
https://silentecho.bespoken.io/link_account?token=true

Save the token - you will use it when call the HTTP interface.

Requests

The Base URL is:
https://silentecho.bespoken.io

• /process
  • Method: GET
  • Parameters:
    • user_id: string - SilentEcho token
    • message: string - The message to send to Echo
    • debug: string [Optional] - If set, returns debug output
  • Response:
    • Status: 200 (If successful)
    • Payload: JSON conforming to this description

Example

HTTP Request:

https://silentecho.bespoken.io/process
    ?user_id=<TOKEN>
    &message=hello there

HTTP Response:

{
    "card": null,
    "sessionTimeout": 0,
    "streamURL": null,
    "transcript": "hi",
    "transcriptAudioURL": "https://storage.googleapis.com/raw_audio/7898e6fb-2d3d-4039-9b4a-00641fa1c249.mp3"
}

What's Next

• Keep the session open longer for deep skill interactions
• More bots. Lots of 'em.