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

# Endstate API

> Verify physical products at the moment a user taps their NFC chip.

<div className="px-4 py-16 lg:py-24 max-w-3xl mx-auto text-center">
  <img src="https://mintcdn.com/endstate/-o0caas8YOAvZHeK/images/endstate-light.png?fit=max&auto=format&n=-o0caas8YOAvZHeK&q=85&s=a7f558c4679c7894c93351ece0e2bfdf" alt="Endstate" className="mx-auto block h-11 dark:hidden" width="320" height="83" data-path="images/endstate-light.png" />

  <img src="https://mintcdn.com/endstate/-o0caas8YOAvZHeK/images/endstate-dark.png?fit=max&auto=format&n=-o0caas8YOAvZHeK&q=85&s=7134460a5a00f2a3725e41afdae2961c" alt="Endstate" className="mx-auto hidden h-11 dark:block" width="320" height="83" data-path="images/endstate-dark.png" />

  <h1 className="mt-6 text-4xl lg:text-5xl font-semibold tracking-tight text-gray-900 dark:text-zinc-50">
    Verify physical products
  </h1>

  <p className="mt-5 text-lg text-gray-500 dark:text-zinc-400">
    The developer API for Endstate — give every physical product a secure
    digital identity, and confirm it's authentic the moment a user taps its NFC
    chip.
  </p>
</div>

<div className="max-w-4xl mx-auto px-6 pb-16">
  <Columns cols={2}>
    <Card title="Quickstart" icon="rocket" href="/quickstart">
      Run a full verification in minutes using a test chip — no hardware
      required.
    </Card>

    <Card title="Core concepts" icon="book-open" href="/concepts/overview">
      Collections, units, real NFC chips, and how verification ties them
      together.
    </Card>

    <Card title="Verify a unit" icon="scan-line" href="/guides/verify-a-unit">
      The production flow with real NTAG 424 DNA chips, end to end.
    </Card>

    <Card title="API reference" icon="code" href="/api-reference/introduction">
      Every endpoint, with request and response schemas.
    </Card>
  </Columns>
</div>