Startups we love you!

Start to build in seconds...

Get Started

From SDKs to step-by-step guides, everything you need is here.

Knowledge Base

Go further and become an expert in telecom. Know their rules!

Blog

It's not just about technologies and innovation, it's also about the world.

Why limit yourself?

Get started in minutes thanks to our comprehensive API documentation. We support all main programming languages: PHP, Ruby, JavaScript, Python, C#, Java, Go... Find scripts and code examples in our SDKs. Need assistance? Reach out to our awesome support team, any time, online, by email or give us a call.

PHP
Ruby
JavaScript
Python

Copied!

// composer require 'callr/sdk-php:dev-master'

require 'vendor/autoload.php';

$api = new \CALLR\API\Client;
$api->setAuth(new \CALLR\API\Authentication\LoginPasswordAuth('login', 'password'));

$from = '';
$to   = '+16463456789';
$text = 'Hello, SMS world!';

$options = new stdClass();
$options->nature = 'ALERTING'; // or 'MARKETING'

$result = $api->call('sms.send', [$from, $to, $text, $options]);

// composer require 'callr/sdk-php:dev-master'

require 'vendor/autoload.php';

$api = new \CALLR\API\Client;
$api->setAuth(new \CALLR\API\Authentication\LoginPasswordAuth('login', 'password'));

$from = '';
$to   = '+16463456789';
$text = 'Hello, SMS world!';

$options = new stdClass();
$options->nature = 'ALERTING'; // or 'MARKETING'

$result = $api->call('sms.send', [$from, $to, $text, $options]);

# gem install callr

require 'callr'
api = CALLR::Api.new('login', 'password')

from = ''
to = '+16463456789'
text = 'Hello CALLR API!'
options = { :nature => 'ALERTING' } # Or 'MARKETING'

result = api.call('sms.send', from, to, text, options)

# gem install callr

require 'callr'
api = CALLR::Api.new('login', 'password')

from = ''
to = '+16463456789'
text = 'Hello CALLR API!'
options = { :nature => 'ALERTING' } # Or 'MARKETING'

result = api.call('sms.send', from, to, text, options)

// npm install callr

var callr = require('callr');
var api = new callr.api('login', 'password');

var from = '';
var to = '+16463456789';
var text = 'Hello CALLR API!';

var options = { nature: 'ALERTING' }; // or 'MARKETING'

api.call('sms.send', from, to, text, options);

// npm install callr

var callr = require('callr');
var api = new callr.api('login', 'password');

var from = '';
var to = '+16463456789';
var text = 'Hello CALLR API!';

var options = { nature: 'ALERTING' }; // or 'MARKETING'

api.call('sms.send', from, to, text, options);

# pip install callr

import callr
api = callr.Api("login", "password")

from = ''
to = '+16463456789'
text = 'Hello CALLR API!'

options = { 'nature': 'ALERTING' } # Or 'MARKETING'

result = api.call('sms.send', from, to, text, options)

# pip install callr

import callr
api = callr.Api("login", "password")

from = ''
to = '+16463456789'
text = 'Hello CALLR API!'

options = { 'nature': 'ALERTING' } # Or 'MARKETING'

result = api.call('sms.send', from, to, text, options)

Apply for your #StartupPack

We select startups who respect the followings criteria:

Don’t have an account on CALLR,
Have less than $1M in funding and are less than 5 years old,
Are associated with one of our partners listed below (optional).

CALLR offers a minimum of €50* worth in credit & a phone number for 6 months* for qualified startups.

This will help you kick-off your project with your first hundreds of minutes or calls for free!

* This offer may vary if you are associated with one of our partners. Check conditions with us.

Our awesome partners:

Le Wagon The Family