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Chump - client for Node.js

NPM Version Build Status Dependency Status

Chump is a client for the popular real-time notification service.

Use Chump to send Android, iOS, watchOS, and desktop notifications.

Chump makes full use of's API.


Chump was written for Node.js 4+.

npm install --save chump

Basic Usage

It is easy to send messages via using Chump.

Sending Messages

let chump = require('chump');

// Instantiate client with your api token
let client = new chump.Client('yourApiToken');

// Instantiate a destination user
let user = new chump.User('userIdHere', 'optionalUserDeviceHere');

// Instantiate a message
let message = new chump.Message({
  title:      'Example title',
  message:    'Example message',
  enableHtml: false,
  user:       user,
  url:        '',
  urlTitle:   '',
  priority:   new chump.Priority('low'),
  sound:      new chump.Sound('magic')

// Send the message, handle result within a Promise
  .then(() => {
	  console.log('Message sent.');
  .catch(error => {
  	console.log('An error occurred.');

All client methods that send a command return a Promise.

Sending Messages With Emergency Priority

An emergency priority can be attached to a message. This requires that the message is acknowledged by the user, and can renotify the user on failure to acknowledge. can also call an optional callback URL after the user acknowledges the message. A message receipt is returned to the resolved Promise on successful delivery of emergency priority messages.

let priority = new chump.Priority('emergency', {
  retry:    300,  // Optional: Notify user every 5 minutes (300 seconds) until acknowledged
  expire:   3600, // Optional: Expire the message in 1 hour (3600 seconds)
  callback: '' // Optional: Callback URL

let message = new chump.Message({
  title:    'Example emergency',
  message:  'Super important message',
  user:     user,
  priority: priority

  .then(receipt => {
    console.log(`Message sent. Receipt is ${receipt}`);

Advanced Usage

Chump supports the entire API. The client offers convenience methods that correspond to each endpoint.

As documented earlier, all client methods that send a command return a Promise.


Verify that a user (and optionally, the user's device) exists on

let user = new chump.user('userIdHere', 'optionalUserDeviceHere');

// Verify the user exists
  .then(() => {
    console.log('User exists.');
  .catch(error => {
    console.log('User may not exist.');


Additional receipt information can be retrieved from Receipts are only returned for messages sent with an emergency priority.

  .then(receipt => {
    console.log(`Receipt: ${}`);
    console.log(`Acknowledged: ${receipt.isAcknowledged}`);
    console.log(`Acknowledged by: ${receipt.acknowledgedBy}`);
    console.log(`Last delivered at: ${receipt.lastDeliveredAt}`);
    console.log(`Is expired: ${receipt.isExpired}`);
    console.log(`Expires at: ${receipt.expiresAt}`);
    console.log(`Has called back: ${receipt.hasCalledBack}`);
    console.log(`Called back at: ${receipt.calledBackAt}`);


A message with an emergency priority can be cancelled.


.getGroupDetails supports managing users within groups. Creating groups can only be done through's website. Assuming you know the group Id, you can use Chump to retrieve information for the group from

let group = new chump.Group(groupId);

  .then(group => {
    console.log(`Group name: ${}`);

    for (let user of group.users) {
      console.log(`User: ${}, ${user.device}`);


Add a user to a known group.

let user  = new chump.User(userId);
let group = new chump.Group(groupId);

client.addUserToGroup(user, group);


Remove a user from a known group.

let user  = new chump.User(userId);
let group = new chump.Group(groupId);

client.removeUserFromGroup(user, group);


Enable a user in a known group.

let user  = new chump.User(userId);
let group = new chump.Group(groupId);

client.enableGroupUser(user, group);


Disable a user in a known group.

let user  = new chump.User(userId);
let group = new chump.Group(groupId);

client.disableGroupUser(user, group);


Rename a known group.

let group = new chump.Group(groupId);

client.renameGroup(group, 'New name');

Track Application Limitations limits the number of messages emitted from its service. Chump keeps track of these limitations after each successful message sent. You can access app limitations from the following client properties:

// Maximum number of messages that can be sent
let appLimit = client.appLimit;

// Number of messages remaining in time period
let appRemaining = client.appRemaining;

// Date when app remaining resets to app limit
let appReset = client.appReset;


Want to see more examples? View them in the examples directory included in this repository.


Chump's initial logo was designed by scorpion6 on Fiverr. Font used is Lato Bold.


This software is licensed under the MIT License. View the license.

Copyright © 2015 Michael K. Squires