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

# URL Standards Overview

> Overview of URL requirements and validation rules for submitting documents through the Paywint API.

## Overview

Some Paywint API endpoints—such as KYB verification, document submission, and compliance checks—require you to provide direct URLs to documents.\
These URLs must follow specific standards to ensure they are secure, accessible, and valid for automated processing.

This section outlines all requirements for document URLs, including security rules, file guidelines, storage recommendations, and troubleshooting steps.

***

## What This Section Covers

<CardGroup cols={2}>
  <Card title="Basic Requirements" href="/guidelines/url-standards/basic-requirements" icon="check-circle" arrow="true">
    Core rules every document URL must follow, including HTTPS and accessibility.
  </Card>

  <Card title="Security Rules" href="/guidelines/url-standards/security-rules" icon="shield-check" arrow="true">
    Allowed protocols, network restrictions, and security validations applied.
  </Card>

  <Card title="File Requirements" href="/guidelines/url-standards/file-rules" icon="file-check" arrow="true">
    Supported file types, maximum file size, and download behavior.
  </Card>

  <Card title="Cloud Storage Guidelines" href="/guidelines/url-standards/cloud-storage" icon="cloud" arrow="true">
    How to generate direct download URLs from Google Drive, Dropbox, AWS S3, and more.
  </Card>

  <Card title="Troubleshooting" href="/guidelines/url-standards/troubleshooting" icon="cog" arrow="true">
    Common errors, causes, and recommended fixes.
  </Card>

  <Card title="Examples" href="/guidelines/url-standards/examples" icon="list" arrow="true">
    Valid and invalid URL examples for quick reference.
  </Card>
</CardGroup>

***

## Why URL Standards Matter

Paywint validates each document URL to ensure:

* The file is safe and accessible
* The host is publicly reachable
* The URL resolves correctly
* The content meets size and type requirements

Following these guidelines prevents delays in verification and ensures smooth document processing.

***

## When You Need These Guidelines

These URL rules apply whenever you submit a document through Paywint, including:

* KYB verification
* Uploading compliance documentation
* Business identity verification
* Proof-of-address checks
* Any endpoint that accepts a document URL

For API-specific requirements, refer to the corresponding endpoint documentation.

***

## Next Steps

Choose a section to continue:

* Start with **[Basic Requirements](/guidelines/url-standards/basic-requirements)**
* Or explore the entire URL Standards collection using the left sidebar navigation