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

# Introduction

> Understand authentication, payments, read-only APIs, and Clark.

<Note>
  This API reference is intentionally curated. Internal, admin, and wallet-resolution endpoints are excluded from public docs.
</Note>

## API coverage

Krypton publishes a focused subset of endpoints across four services:

* **Backend API**: account creation/sign-in, username setup, KYC, and payments.
* **Web3 API**: transaction state plus read-only pricing and quote endpoints.
* **Hedge Fund API**: strategy discovery and read-only strategy data.
* **Clark API**: query, conversation, and memory endpoints for the Clark assistant. For a **user-journey overview** (not implementation detail), see [Clark → Introduction](/clark/introduction).

## Authentication

Use your auth token in the `Authorization` header:

```bash theme={null}
Authorization: Bearer <token>
```

Some endpoints have service-specific auth behavior defined directly in the OpenAPI spec.

## Start with these workflows

<Steps>
  <Step title="Sign in or create account">
    Call the login endpoint and then set a username for the account.
  </Step>

  <Step title="Complete KYC checks">
    Create an applicant, fetch access tokens, and poll KYC status.
  </Step>

  <Step title="Send funds">
    Use the payment endpoints to send USDC and monitor transaction status.
  </Step>

  <Step title="Read portfolio and market data">
    Fetch read-only rates, token prices, and strategy details.
  </Step>

  <Step title="Add Clark (optional)">
    If you expose Krypton's assistant, read [Clark → Introduction](/clark/introduction) for the experience model and [Clark → Quickstart](/clark/quickstart) to integrate, then use the Clark API group for endpoints.
  </Step>
</Steps>

## Public reference policy

* Included: account setup, payments, and read-only endpoints.
* Excluded: wallet resolution, internal diagnostics, admin routes, and operational webhooks.