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

# Welcome to Prelude Docs

> Prelude is the authentication infrastructure for developer teams, built on telco intelligence to verify users via phone or email, prevent fraud, and manage authentication across 230+ countries.

To learn more about Prelude, our products and pricing, visit our website at [prelude.so](https://prelude.so).

<Note>To create a new account or login to your existing one, visit the [Dashboard](https://app.prelude.so).</Note>

## Build with Prelude

Prelude offers a suite of APIs to help you verify users, prevent fraud, and manage authentication at scale. Find the documentation for each product below.

<Columns>
  <Card title="Verify" href="/verify/v2/documentation/introduction" icon="fingerprint" cta="Start building" iconType="solid" horizontal arrow="true">
    Verify phone numbers and emails worldwide across SMS, RCS, WhatsApp, and Silent Network Authentication. 20-30% higher conversion, 30-40% lower costs.
  </Card>

  <Card title="Auth" href="/auth/documentation/introduction" icon="tickets" cta="Start building" iconType="solid" horizontal arrow="true">
    Manage the full lifecycle of user authentication: OTP, password, social login, and step-up, with fraud prevention built in from day one.
  </Card>

  <Card title="Watch" href="/watch/v2/documentation/introduction" icon="radar" cta="Start building" iconType="solid" horizontal arrow="true">
    Protect your business and users from fraud by analyzing in real-time dozens of digital signals to block suspicious users before verification. Millions of fraudulent requests blocked every year.
  </Card>

  <Card title="Intel" href="/intel/v2/documentation/introduction" icon="telescope" cta="Start building" iconType="solid" horizontal arrow="true">
    Phone number intelligence API. Retrieve carrier data, line type, portability status, and caller name for any number worldwide.
  </Card>

  <Card title="Notify" href="/notify/v2/documentation/introduction" icon="comment-dots" cta="Start building" iconType="solid" horizontal arrow="true">
    Send transactional and marketing messages globally via SMS, RCS, and WhatsApp, automatically routed for maximum deliverability across 230+ countries.
  </Card>
</Columns>

<Info>
  Can't find what you're looking for? [Tell us](mailto:support@prelude.so)
</Info>