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

# VoiceInfra Integrations: Connect Your Entire Tech Stack

> VoiceInfra integrates with 100+ tools across CRM, PBX, CCaaS, automation platforms, calendars, and commerce systems. Deploy in under 30 minutes.

VoiceInfra connects to your existing tech stack without a rip-and-replace. Whether you're running a 3CX PBX, a Salesforce CRM, or a custom-built API, VoiceInfra slots in via SIP, REST, webhooks, or Model Context Protocol — giving your AI agents access to real data and the ability to execute real actions during live calls. Most integrations go live in under 30 minutes.

## Integration Methods

<CardGroup cols={2}>
  <Card title="Infrastructure (SIP & PBX)" icon="server" href="/docs/channels/pbx-extensions">
    Register AI agents as extensions on 3CX, Yeastar, FreePBX, Avaya, Cisco, and any SIP-compatible system. No new phone numbers. No carrier changes.
  </Card>

  <Card title="API & Webhooks" icon="webhook" href="/docs/integrations/webhooks">
    Use the VoiceInfra REST API to trigger outbound calls programmatically, and receive real-time call data at your own endpoints when calls complete.
  </Card>

  <Card title="Knowledge Base" icon="book-open" href="/docs/agents/knowledge-base">
    Upload documents, paste text, or crawl your website to give agents RAG-powered answers from your own content — no retraining, no hallucinations.
  </Card>

  <Card title="Automation Platforms" icon="bolt" href="/docs/integrations/automation-platforms">
    Connect 5,000+ apps without code via Zapier, Make.com, n8n, or Pipedream. Trigger Zaps from call completions, or initiate AI calls from CRM events.
  </Card>
</CardGroup>

## Supported Integrations

Browse every tool and platform you can connect to VoiceInfra today.

### CRM

| Platform       | Key capabilities                                                                            |
| -------------- | ------------------------------------------------------------------------------------------- |
| Salesforce     | Lead qualification, Opportunity management, Flow automation, dynamic outbound call triggers |
| HubSpot        | Contact and deal updates, sequence enrollment, lead scoring, marketing automation           |
| Pipedrive      | Deal stage updates, activity logging, pipeline management                                   |
| Zoho CRM       | Contact lookup, lead qualification, outbound call triggers                                  |
| Freshworks     | Contact management, ticket creation, customer history access                                |
| ActiveCampaign | Contact tagging, automation triggers, deal management                                       |
| ServiceTitan   | Job booking, dispatch scheduling, customer history (field service)                          |
| AthenaOne      | Patient record access, appointment scheduling (healthcare)                                  |

### CCaaS

Five9, Avaya, Cisco, CloudTalk, JustCall, Dialpad, NICE, Genesys, RingCentral, Twilio, Vonage, Talkdesk, Amazon Connect, MessageBird, Telnyx, Plivo, Sinch

### PBX & VoIP

3CX, Yeastar, FreePBX, Ooma, Nextiva, Enreach, Asterisk, 8x8, GoTo, Grasshopper, Aircall, Ringover, Zadarma, Mitel, Sangoma, Grandstream, Alcatel-Lucent Enterprise, Karel, OpenPhone

### Calendars

Google Calendar, Outlook Calendar, Calendly, Cal.com, Acuity Scheduling

### Customer Support

Zendesk, Intercom, Freshworks, Shopify, Monday.com

### Automation Platforms

| Platform     | App ecosystem                       |
| ------------ | ----------------------------------- |
| Zapier       | 5,000+ apps                         |
| Make.com     | 1,000+ apps                         |
| n8n          | Open-source, self-hostable          |
| Pipedream    | Developer-focused, event-driven     |
| ActivePieces | Open-source self-hosted alternative |
| IFTTT        | Consumer and SMB automation         |

### Commerce & Payments

Stripe, Shopify, WooCommerce

### Productivity

Slack, Microsoft Teams

***

## How to Connect

VoiceInfra supports five connection methods. Choose the one that fits your system.

**1. OAuth** — for apps with native OAuth 2.0 flows (HubSpot, Google Calendar, Microsoft 365). Click **Connect** in Settings → Integrations and follow the guided authorization.

**2. API Key** — for REST API integrations (Salesforce, Stripe, Twilio, etc.). Paste your API key or token into the integration settings form.

**3. MCP Server** — connect any MCP-compatible tool for real-time in-call actions. Your agent calls the tool during the conversation and acts on the result immediately.

**4. Custom Functions** — define any REST API endpoint as a callable function. Your agent invokes it mid-call to fetch data or trigger actions, no custom code required on your side.

**5. Webhooks** — configure an HTTPS endpoint in your own system to receive a POST request with full call data every time a call completes.

<Note>
  PBX and SIP integrations are handled separately under **Settings → SIP & Numbers**. See the [SIP integration guide](/docs/channels/sip-numbers) for details.
</Note>

***

## Deeper Guides

<CardGroup cols={2}>
  <Card title="CRM Integrations" icon="address-book" href="/docs/integrations/crm">
    Connect Salesforce, HubSpot, Pipedrive, and more. Log calls, update records, and trigger workflows automatically.
  </Card>

  <Card title="Automation Platforms" icon="bolt" href="/docs/integrations/automation-platforms">
    Trigger Zapier, Make.com, n8n, and Pipedream workflows from call events — or fire outbound AI calls from your automations.
  </Card>

  <Card title="MCP Servers" icon="plug" href="/docs/integrations/mcp-servers">
    Give agents real-time access to any external tool, database, or API using Model Context Protocol.
  </Card>

  <Card title="Custom Functions" icon="code" href="/docs/integrations/custom-functions">
    Connect any REST endpoint as a callable function your agent can invoke during a live conversation.
  </Card>

  <Card title="Webhooks" icon="webhook" href="/docs/integrations/webhooks">
    Receive full call data — transcripts, recordings, outcomes — via signed POST requests when calls complete.
  </Card>
</CardGroup>