> ## Documentation Index
> Fetch the complete documentation index at: https://docs.landedfees.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Playground

> The live in-browser playground for the LandedFees API.

The [playground at landedfees.com/developers/try](https://www.landedfees.com/developers/try)
is a hosted, prefilled UI for every v1 endpoint. It runs against the
production API using a temporary sandbox key issued when you sign in,
so you can test any endpoint without deploying code.

<Card title="Open the playground" icon="play" href="https://www.landedfees.com/developers/try">
  Prefilled request bodies for calc, calc/bulk, classify, compare,
  and rates. Live responses, copyable curl snippets.
</Card>

## What is inside

* Prefilled request bodies for every endpoint.
* Live response viewer with syntax highlighting.
* One-click copy of the exact curl command that produced the response.
* Rate-limit header display so you can watch the burst window shrink.
* Endpoint switcher with saved requests per browser.

## When to use it

* Verifying a new HS code against real production rates.
* Sanity-checking a bulk request payload before wiring it into your ETL.
* Reproducing a bug report from a customer (paste their body, hit send,
  copy the response into the ticket).

## When to use the SDKs instead

* Anything that runs on a schedule.
* Anything that needs to persist results.
* Anything you want under version control.

Install the [Python](/sdks/python) or [TypeScript](/sdks/typescript)
SDK for production workloads.