Quick Start Guide

CallFire provides user-friendly, intuitive voice and text connectivity products to over 100,000 businesses. The company is dedicated to providing high-availability systems, intuitive user interfaces, furious developer support, and unparalleled customer care. Many customers chose our platform and its API to build their businesses. This guide shows how easy to set up an integration with CallFire platform.

Register a CallFire Developers' account

Account registration is FREE, easy, and can be done in a few steps:

Create an account

Fill in user email and password

Complete registration

Once you register an account, you can start using CallFire Developers' UI to send out calls, texts, broadcasts, etc.

Please note that API credentials are different from your account's credentials. To use the CallFire API, you should generate API credentials either on the Developers' UI Settings page or use the special API for that which accepts your account credentials.

How to Generate API Credentials

All CallFire APIs accept API credentials except Credentials APIs which use your regular account credentials.

You can generate new API credentials in two steps:

Note that we do not offer test accounts, but we can provide a small amount of free credits. If you need more credits for testing please contact our support.

Authenticate your API requests

The CallFire API v2 uses HTTP Basic Authentication to verify the user of an endpoint. A generated username/password API credential is required for this step (see 'How to Generate API Credentials'). To use HTTP Basic Authentication, an Authorization header must be sent.

Example of generated API credentials

Username: a6343cc4edd6
Password: c2d77eec4aa3e224

The header that the user sends looks like this:

Authorization: Basic a6343cc4edd6:c2d77eec4aa3e224

That is all that is needed to authenticate to the CallFire API.

CallFire API SDKs

CallFire provides an open-source Software Development Kit (SDK) for several programming languages to allow clients to integrate their systems with CallFire very quickly. Follow the SDK link for your programming language, and there you can find instructions on how to add an SDK package to your project.

API ver. Language Link
1.1 PHP CallFire-PHP-SDK
1.1 C#.NET CallFire-CSharp-SDK
1.1 Java callfire-api-1.1-client-java
2.0 Java callfire-api-client-java
2.0 C#.NET callfire-api-client-csharp
2.0 Javascript callfire-api-client-js
2.0 Python callfire-api-client-python
2.0 PHP callfire-api-client-php

Next Steps

Discover CallFire Swagger Interface https://www.callfire.com/v2/swagger-ui/index.html where you can find JSON model schemas and execute the CallFire API right from your browser (requires API credentials in the right upper form).

You can learn more about CallFire API on our LEARN page. There you can find useful guides with code samples which shows how to

See the following guides about different use-cases of CallFire's products using API:

and don't forget to visit following links to

See API reference documentation for more information about all available API methods.

Verify a Caller ID

A numerical caller ID (caller identification, CID) is displayed on the recipient’s phone as it rings. Caller identification lets your customers, employees and business contacts know you're calling them. CallFire allows you to set your phone number as a caller ID.

How to set up the Caller ID

CallFire provides two ways to add a Caller ID to your account. Let's take a look how to do that.

  1. through Developers' UI

    • go to the Settings page and find the 'Caller IDs' section
    • type in your phone number and click the 'Send' button

    Send verification code

    • you will receive a phone call with a verification code; put it into the field and click the 'Verify' button

    Verify phone number

    • now you can use your number as a FromNumber for outbound calls.
  2. through the CallFire API

    • send a POST request to /me/callerids/{callerid}, where {callerid} is your phone number. This operation sends a verification code to the phone number provided in the path. The verification code is delivered via a phone call. This code needs to be submitted to the verify the Caller ID API endpoint (see the next step).
curl -u "username:password" -H "Content-Type:application/json" -X POST "https://api.callfire.com/v2/me/callerids/12135551175"
curl -u "username:password" -H "Content-Type:application/json" -X POST -d '
    }' "https://api.callfire.com/v2/me/callerids/12135551175/verification-code"

You may use several Caller IDs within one account.