# Introduction

### Overview

HollaTags API enables you to seamlessly integrate SMS, USSD & Voice functionalities into your website or application.

The documentation is broken into two main parts based on connection protocol - [**HTTP**](https://docs.hollatags.com/sms/send) *(POST/GET)* or [**SMPP**](https://docs.hollatags.com/smpp/smpp-specification). Customers are encouraged to use the protocol of their choice. Typically, high volume customers will use [SMPP](https://docs.hollatags.com/smpp/smpp-specification) connection.

If you require any assistance, please email our dev support team at <help@hollatags.com>

### API Endpoint

In order to use HollaTags APIs, you need to first sign up for free at <https://sms.hollatags.com> . The API Endpoint is <https://sms.hollatags.com/api/>

### API Response

All responses for the HTTP API are plain text with a 200 OK status even for errors. Please use the [**API Response** ](https://docs.hollatags.com/sms/api-response)page for the list of all possible responses for success and error.

### SMPP Connection

HollaTags SMPP interface provides support for almost all features of SMPP within the official specification and without proprietary deviation. You can download the full specification here - <http://opensmpp.org/specs/SMPP_v3_4_Issue1_2.pdf>

The following pages provide details on [authentication](https://docs.hollatags.com/smpp/authentication), [configuration](https://docs.hollatags.com/smpp/connection), [supported pdu](https://docs.hollatags.com/smpp/message-pdu) and [sample smpp client configurations](https://docs.hollatags.com/smpp/client-configuration).


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.hollatags.com/master.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.