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

# Connect Paychex with OAuth 2.0 (Client Credentials) – StackOne Hub

> Link a Paychex account in the StackOne Hub using OAuth 2.0 (Client Credentials). End-user guide to authorize the integration and start using Paychex actions.

<section data-guide-section data-guide-scopes="">
  <h2>Register an Application</h2>

  <p>Create an application in the Paychex Developer Portal to obtain API credentials.</p>

  <Steps>
    <Step title="Sign in to the Developer Portal">
      <div data-guide-step data-guide-scopes="" data-guide-display-scopes-list="">
        <p>Sign in at <a href="https://developer.paychex.com/" target="_blank" rel="noopener noreferrer">developer.paychex.com</a>.</p>

        <ul>
          <li>Navigate to <strong>My Apps</strong> and create a new application.</li>
        </ul>
      </div>
    </Step>

    <Step title="Request Client Access">
      <div data-guide-step data-guide-scopes="" data-guide-display-scopes-list="">
        <p>Your application must be granted access to a Paychex client (company) before it can call the API.</p>

        <ul>
          <li>Follow the portal's client access request flow for the company whose data you need.</li>
        </ul>
      </div>
    </Step>

    <Step title="Copy your API Key and Secret">
      <div data-guide-step data-guide-scopes="" data-guide-display-scopes-list="">
        <p>Once your app is approved, retrieve its credentials.</p>

        <ul>
          <li>Copy the <strong>API Key</strong> (used as the Client ID) and store it securely.</li>
          <li>Copy the corresponding <strong>Secret</strong> (used as the Client Secret) — treat it like a password.</li>
        </ul>
      </div>
    </Step>
  </Steps>
</section>

<div data-whitelabel-hide>
  <h2>Linking the Account from the Hub</h2>

  <Steps>
    <Step title="Navigate to the Hub">
      Use one of the three <a href="/guides/accounts-section#linking-accounts">Linking Account Methods</a> to access the Hub.
    </Step>

    <Step title="Connect">
      <ul>
        <li>Click <strong>Connect</strong></li>
        <li>If applicable, the provider will redirect you to a sign-in or authorization page. Complete the provider's authorization flow.</li>
        <li>Once authorization is successful, you will see a confirmation popup</li>
      </ul>
    </Step>
  </Steps>

  <p>If the account linking is successful, you will see the newly linked account in your <a href="/guides/accounts-section">Accounts</a> page.</p>
</div>