# Introduction
## Introduction
The Tap & Go data api is organised around [REST](http://en.wikipedia.org/wiki/Representational_State_Transfer). Our API has predictable resource-oriented URLs, accepts [JSON-encoded](http://www.json.org/) request bodies, returns [JSON-encoded](http://www.json.org/) responses, and uses standard HTTP response codes, authentication, and verbs.
You can use the Tap & Go API in test mode, which doesn't affect your live data or interact with the banking networks. The API key you use to [authenticate](https://docs.tapngogh.com/broken-reference) the request determines whether the request is live mode or test mode.
The Tap & Go API doesn't support bulk updates. You can work on only one object per request.
The API differs for every account as we release new versions and tailor functionality. Log in to see docs customised to your version of the API, with your test key and data.
## Want to jump right in?
Feeling like an eager beaver? Jump in to the quick start docs and get making your first request:
{% content-ref url="quick-start" %}
[quick-start](https://docs.tapngogh.com/quick-start)
{% endcontent-ref %}
{% content-ref url="reference/data-services" %}
[data-services](https://docs.tapngogh.com/reference/data-services)
{% endcontent-ref %}
{% content-ref url="reference/card-services" %}
[card-services](https://docs.tapngogh.com/reference/card-services)
{% endcontent-ref %}
{% content-ref url="reference/payment" %}
[payment](https://docs.tapngogh.com/reference/payment)
{% endcontent-ref %}
## Want to deep dive?
Dive a little deeper and start exploring our API reference to get an idea of everything that's possible with the API:
---
# 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.tapngogh.com/introduction.md?ask=
```
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.