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

# Masker docs: voice AI compliance firewall

> Documentation for Masker — the PHI redaction proxy for voice AI. Covers quickstart, integrations, compliance reports, and API reference.

Masker is a privacy layer that sits between your voice platform and your upstream LLM. Every conversation turn is scanned for PHI — names, SSNs, dates of birth, phone numbers, and more — and each sensitive span is replaced with a stable, reversible token before being forwarded to OpenAI, Anthropic, or any OpenAI-compatible model. When the LLM responds, Masker swaps the tokens back so the caller hears a natural answer. Real PHI never leaves your regulated boundary.

<CardGroup cols={2}>
  <Card title="Quick Start" icon="rocket" href="/quickstart">
    Connect your first Vapi agent and place a masked call in under five minutes.
  </Card>

  <Card title="How It Works" icon="diagram-project" href="/how-it-works">
    Understand the request path from voice vendor to LLM and back.
  </Card>

  <Card title="Integrations" icon="plug" href="/integrations/vapi">
    Connect Masker to Vapi, ElevenLabs, Bolna, or any OpenAI-compatible platform.
  </Card>

  <Card title="API Reference" icon="code" href="/api-reference/introduction">
    Manage agents, list sessions, and download compliance reports via REST.
  </Card>
</CardGroup>

## What Masker does

<CardGroup cols={2}>
  <Card title="PHI Detection" icon="shield-halved" href="/masking/detection">
    Regex, spoken-form matching, and on-device NER detect SSN, phone, email, names, addresses, and more.
  </Card>

  <Card title="Reversible Tokenization" icon="key" href="/masking/tokenization">
    Two schemes — vault-deterministic HMAC and stateless AES-256-GCM-SIV AEAD — keep tokens rehydratable.
  </Card>

  <Card title="Compliance Reports" icon="file-shield" href="/compliance/audit-reports">
    Every session generates an Ed25519-signed HIPAA Safe Harbor report as JSON and PDF.
  </Card>

  <Card title="Audit Chain" icon="link" href="/compliance/overview">
    Each detection event is hash-chained for tamper evidence — verifiable offline with a single command.
  </Card>
</CardGroup>

## Get started in three steps

<Steps>
  <Step title="Sign in to the portal">
    Open [masker-voice.fly.dev/portal/login](https://masker-voice.fly.dev/portal/login) and sign in with GitHub. No API key required for the beta.
  </Step>

  <Step title="Create an agent and copy the proxy URL">
    Click **New Agent**, paste your Vapi API key, and copy the generated proxy URL. Masker configures Vapi automatically.
  </Step>

  <Step title="Place a test call and verify">
    Place a call through Vapi, then open OpenAI's logs to confirm only tokens — not raw PHI — reached the model.
  </Step>
</Steps>

<Note>
  Masker is in private beta. The portal and live demo at [try.masker.dev](https://try.masker.dev) are functional today. Production beta launches **May 30, 2026**. [Request access](/beta-access) to get on the list.
</Note>