0.0.8 • Public • Published

CleverTap Signed Call Web SDK

👋 Introduction

CleverTap provides In-App calls via its Signed Call Web SDK, which means you can make calls on any webpage if a device has an internet connection and the Signed Call Web SDK. This section shows how to integrate the Signed Call Web SDK and manage calls.

Integrate the Signed Call Web SDK

Using the Node Package Manager (NPM)

You can add the Signed Call Web SDK as an npm to your web app.

Step 1: Use the following npm command to install the package:

 npm install clevertap-signed-call --save

Step 2: Import the installed package as below:

import {initSignedCall} from 'clevertap-signed-call'

Step 3: Initialize and Authenticate the SDK

let SignedCallClient

    accountId: <string>,
    apikey: <string>,
    cuid: <string>,
    clevertap: <clevertap sdk instance>,
    name: <string / optional>,
    ringtone: <string / optional>
).then(client => SignedCallClient = client)
.catch(err => console.log(err))

The options parameter in the initSignedCall function expects a JSON object with the following properties:

Properties Description
accountId (string, required) The Account ID is available from the dashboard.
apikey (string, required) The API Key is available from the dashboard
cuid (string, required) Unique user ID of the person making a call.
- The cuid must range between 5 and 50 characters.
- The cuid is case sensitive, and only '_' is allowed as a special character.
- The cuid parameter cannot be of the number-number type, that is, - a number followed by another number separated with a special character. For example, org_25 is allowed, but 91_8899555 is not allowed.
- You must use a unique cuid for every device.
clevertap (required) The Clevertap Web SDK instance.
name (string, optional) The name of the initiator.
- The name must range between 3 and 50 characters.
ringtone (string, optional) The url of the ringtone to be played when the ringer starts.

Make a Call

The dialing screen displays when the SignedCallClient from the initSignedCall() function invokes the call() method to make an outbound call. This method returns a promise object whose then() and catch() can be utilized for the following scenarios:

Scenario 1:

When the call is answered, the outgoing call screen transitions into the ongoing call screen. After the transition, the then() method receives an over status and indicates that the call is completed successfully.

Scenario 2:

The declined and missed statuses received by the catch() method indicate whether the receiver rejected the call (decline) or did not answer the call (miss).

The call() parameters are as follows:

Parameter Description
receiver (required) It is a string of cuid For example: receiver = 'some_unique_id'
context (required) It specifies the context of the call. For example, Trainer is calling, Grocer is calling, Tutor is calling, and so on.
callOptions (optional) It is a JSON object with the following properties:
receiver_image (string, optional): This URL displays the receiver's image on the outgoing call screen.
initiator_image (string, optional): This URL displays the initiator's image on the incoming call screen.

Hangup Call

This functionality depends on user behaviour i.e. if one of the user in a call presses the hangup button on the ongoing call screen, the call termination by default is managed by the sdk.

Only in the case of a metered call, when a business wants to end a call after a specific duration, then they must maintain a timer in the app and call the SignedCallClient.hangup() function programatically at an appropriate time.


Logout the SDK

Logout the SignedCallClient via calling SignedCallClient.logout() method. It ends all the connections, and to make a new call, you must repeat the Initialization and Authentication steps.



via NPM

  import {initSignedCall} from 'clevertap-signed-call'
  let SignedCallClient
  //initiate the sdk
      accountId, //string, required
      apikey, // string, required
      cuid, // string,required
      clevertap, // clevertap instance, required
      name, // string, optional
      ringtone // string, optional
  }).then(client => SignedCallClient = client).catch(err => console.error(err))

  // make a call
  function call() {
      let callOptions = {
        receiver_image: "", // optional, string
        initiator_image: "" // optional, string

       * receiver {string, required}: cuid whom you are calling
       * context {reason, required}: reason of call
       * callOptions {optional}
       * */, context,calloptions)
        .then((response) => {
          console.log("Call response : ", response);
        .catch((error) => {

    // Hangup a call automatically after 20000ms 
    setTimeout((SignedCallClient.hangup()), 20000)

    // Logout the sdk 
    let logout = function () {


Error Reason
ERR_MISSING_INITPARAMETERS One (or more) mandatory parameter is missing in SDK Initialization and Authentication
ERR_INVALID_INITPARAMETERS Parameters are not valid.
ERR_MISSING_CT_ACCOUNTID Signed Call SDK is unable to find the Account ID associated with CleverTap.
ERR_MISSING_CT_ID Signed Call SDK cannot find the CleverTap ID.
ERR_INVALID_CREDENTIALS Signed Call's account ID or API Key is incorrect.
ERR_ALREADY_SIGNEDIN The cuid entered is currently connected elsewhere.
ERR_MIC_UNAVAILABLE Microphone permission denied.
ERR_OUTGOING_CALL_IN_PROGRESS If a call is already in progress, then another can only be initiated if the current call is over, missed, declined, or canceled.
ERR_INVALID_CALL_PARAMETERS The parameters provided in Make Call are incorrect.
ERR_INTERNET_LOST The call could not occur successfully because the internet is lost.
404 The receiver's cuid is offline.


Q. Is Signed Call accountId and apikey the same as CleverTap's accountId and token? A. No. Signed Call accountId and apikey are different from CleverTap's accountId and token. You can find these details under your dashboard's Signed Call section.

Q. I am getting an EER_MISSING_CT_ID error even after passing the correct CleverTap instance to the clevertap-signed-call sdk?

A. This error occurs due to the following reasons:

  • The CleverTap SDK's region and accountId parameters are incorrect.
  • CleverTap SDK is not initialized. Recheck these details and if this issue persists, raise an issue at CleverTap Support.




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