VapiAI · stephenvapiai · Sep 4, 2026 · Sep 4, 2026
diff --git a/fern/advanced/sip/sip-chime.mdx b/fern/advanced/sip/sip-chime.mdx
@@ -2,6 +2,7 @@
 title: Amazon Chime SDK SIP Integration
 subtitle: How to integrate Amazon Chime SDK Voice Connector with Vapi
 slug: advanced/sip/amazon-chime
+description: Integrate Amazon Chime SDK Voice Connector with Vapi for inbound and outbound SIP trunking, connecting an AI assistant to a phone number without Lambda logic.
 ---
 
 This guide walks you through setting up both outbound and inbound SIP trunking between Amazon Chime SDK and Vapi using a Voice Connector.

diff --git a/fern/advanced/sip/sip-networking.mdx b/fern/advanced/sip/sip-networking.mdx
@@ -2,6 +2,7 @@
 title: SIP networking and firewall configuration
 subtitle: Learn to configure your network to allow SIP signalling and media traffic with Vapi
 slug: advanced/sip/sip-networking
+description: Configure your firewall and network for Vapi SIP trunks, with the IP addresses, ports, and protocols needed to allow SIP signaling and RTP media traffic.
 ---
 
 ## Overview

diff --git a/fern/advanced/sip/sip-plivo.mdx b/fern/advanced/sip/sip-plivo.mdx
@@ -2,6 +2,7 @@
 title: Plivo SIP Integration
 subtitle: Learn to connect your Plivo SIP trunk to Vapi for inbound and outbound calls
 slug: advanced/sip/plivo
+description: Connect a Plivo SIP trunk to your Vapi agents for inbound and outbound calls, covering trunk setup and routing between Plivo and Vapi.
 ---
 
 ## Overview

diff --git a/fern/advanced/sip/sip-telnyx.mdx b/fern/advanced/sip/sip-telnyx.mdx
@@ -2,6 +2,7 @@
 title: Telnyx SIP integration
 subtitle: How to integrate SIP Telnyx to Vapi
 slug: advanced/sip/telnyx
+description: Connect a Telnyx SIP trunk to Vapi for inbound and outbound calls, walking through the full setup so your AI voice assistants can handle calls.
 ---
 
 Integrate your Telnyx SIP trunk with Vapi to enable your AI voice assistants to handle calls efficiently. This guide walks you through the complete setup process for both inbound and outbound calls.

diff --git a/fern/advanced/sip/sip-trunk.mdx b/fern/advanced/sip/sip-trunk.mdx
@@ -2,6 +2,7 @@
 title: SIP Trunking
 subtitle: How to integrate your SIP provider with Vapi
 slug: advanced/sip/sip-trunk
+description: Integrate your SIP provider with Vapi using SIP trunking, connecting your PBX or VoIP system to the PSTN with the network and allowlist requirements.
 ---
 
 SIP trunking replaces traditional phone lines with a virtual connection over the internet, allowing your business to make and receive calls via a broadband connection. It connects your internal PBX or VoIP system to a SIP provider, which then routes calls to the Public Switched Telephone Network (PSTN). This setup simplifies your communications infrastructure and often reduces costs.

diff --git a/fern/advanced/sip/sip-twilio.mdx b/fern/advanced/sip/sip-twilio.mdx
@@ -2,6 +2,7 @@
 title: Twilio SIP Integration
 subtitle: How to integrate Twilio SIP with Vapi
 slug: advanced/sip/twilio
+description: Connect a Twilio SIP trunk to Vapi for inbound and outbound calls, walking through the setup so your AI voice assistants can handle Twilio calls.
 ---
 
 <Frame>

diff --git a/fern/advanced/sip/sip-zadarma.mdx b/fern/advanced/sip/sip-zadarma.mdx
@@ -2,6 +2,7 @@
 title: Zadarma SIP Integration
 subtitle: How to integrate SIP Zadarma to Vapi
 slug: advanced/sip/zadarma
+description: Connect a Zadarma SIP trunk to Vapi for inbound and outbound calls, walking through the setup so your AI voice assistants can handle Zadarma calls.
 ---
 
 

diff --git a/fern/advanced/sip/sip.mdx b/fern/advanced/sip/sip.mdx
@@ -2,6 +2,7 @@
 title: SIP introduction
 subtitle: Make SIP calls to your Vapi assistant
 slug: advanced/sip
+description: Make and test SIP calls to a Vapi assistant from any SIP client or softphone, assigning a SIP phone number and passing template variables through SIP headers.
 ---
 
 ## Overview

diff --git a/fern/advanced/sip/troubleshoot-sip-trunk-credential-errors.mdx b/fern/advanced/sip/troubleshoot-sip-trunk-credential-errors.mdx
@@ -2,6 +2,7 @@
 title: "Troubleshoot SIP trunk credential errors"
 subtitle: "Learn to resolve gateway creation failures when setting up a BYO SIP trunk"
 slug: advanced/sip/troubleshoot-sip-trunk-credential-errors
+description: Resolve the SIP gateway creation failed error when creating a BYO SIP trunk credential in Vapi, covering the common causes and how to fix each one.
 ---
 
 ## Overview

diff --git a/fern/assistants/assistant-hooks.mdx b/fern/assistants/assistant-hooks.mdx
@@ -2,6 +2,7 @@
 title: Assistant hooks
 subtitle: Automate actions on call events and interruptions
 slug: assistants/assistant-hooks
+description: Automate actions on Vapi call events like ending and speech interruptions, using assistant hooks to transfer calls, run functions, or send messages.
 ---
 
 ## Overview

diff --git a/fern/assistants/background-messages.mdx b/fern/assistants/background-messages.mdx
@@ -2,6 +2,7 @@
 title: Background messages
 subtitle: Silently update chat history with background messages
 slug: assistants/background-messages
+description: Silently add information to a Vapi call's chat history without notifying the user, logging button presses, actions, or context updates during the conversation.
 ---
 
 ## Overview

diff --git a/fern/assistants/call-analysis.mdx b/fern/assistants/call-analysis.mdx
@@ -2,6 +2,7 @@
 title: Call analysis
 subtitle: Summarize and evaluate calls automatically
 slug: assistants/call-analysis
+description: Automatically summarize and evaluate every Vapi call after it ends, using an LLM to generate summaries, extract structured data, and score calls for quality.
 ---
 
 ## Overview

diff --git a/fern/assistants/concepts/transient-vs-permanent-configurations.mdx b/fern/assistants/concepts/transient-vs-permanent-configurations.mdx
@@ -2,6 +2,7 @@
 title: "Transient vs permanent configurations"
 subtitle: "Learn to choose between inline and stored assistant configurations"
 slug: assistants/concepts/transient-vs-permanent-configurations
+description: Choose between transient inline and permanent stored assistant configurations in Vapi, and learn when each fits for flexibility, reusability, and management.
 ---
 
 ## Overview

diff --git a/fern/assistants/dynamic-variables.mdx b/fern/assistants/dynamic-variables.mdx
@@ -2,6 +2,7 @@
 title: Variables
 subtitle: Personalize assistant messages with dynamic and default variables
 slug: assistants/dynamic-variables
+description: Personalize Vapi assistant prompts and messages with dynamic variables in double curly braces, setting values at call time through assistantOverrides.
 ---
 
 ## Overview

diff --git a/fern/assistants/email-address-reading.mdx b/fern/assistants/email-address-reading.mdx
@@ -2,6 +2,7 @@
 title: Email address reading
 subtitle: Get your voice agent to collect, read back, and confirm email addresses clearly
 slug: assistants/email-address-reading
+description: Get a Vapi voice agent to collect, read back, and confirm email addresses clearly, using built-in TTS formatting, prompting, and confirmation techniques.
 ---
 
 ## Overview

diff --git a/fern/assistants/examples/docs-agent.mdx b/fern/assistants/examples/docs-agent.mdx
@@ -2,6 +2,7 @@
 title: Documentation agent
 subtitle: Build a voice assistant that answers questions about your docs
 slug: assistants/examples/docs-agent
+description: Build a Vapi voice assistant that answers questions about your documentation, step by step, using the Dashboard or the API to configure and deploy it.
 ---
 
 Try our live implementation using the voice widget in the bottom-right corner of this page.

diff --git a/fern/assistants/examples/voice-widget.mdx b/fern/assistants/examples/voice-widget.mdx
@@ -4,6 +4,7 @@ subtitle: >-
   Easily integrate the Vapi Voice Widget into your website for enhanced user
   interaction.
 slug: assistants/examples/voice-widget
+description: Add the Vapi Voice Widget to your website so visitors can talk to a voice assistant, using a copy-paste snippet or a custom implementation.
 ---
 
 Improve your website's user interaction with the Vapi Voice Widget. This robust tool enables your visitors to engage with a voice assistant for support and interaction, offering a smooth and contemporary way to connect with your services.

diff --git a/fern/assistants/idle-messages.mdx b/fern/assistants/idle-messages.mdx
@@ -2,6 +2,7 @@
 title: Idle messages
 subtitle: Keep users engaged during conversation pauses
 slug: assistants/idle-messages
+description: Keep users engaged during Vapi call pauses with idle messages that trigger on customer silence, using fixed text or model-generated prompts via assistant hooks.
 ---
 
 ## Overview

diff --git a/fern/assistants/personalization.mdx b/fern/assistants/personalization.mdx
@@ -2,6 +2,7 @@
 title: Personalization with user information
 subtitle: Add customer-specific information to your voice assistant conversations
 slug: assistants/personalization
+description: Personalize Vapi conversations with customer-specific data your server supplies at call time, tailoring responses for support, account management, and more.
 ---
 
 ## Overview

diff --git a/fern/assistants/pronunciation-dictionaries.mdx b/fern/assistants/pronunciation-dictionaries.mdx
@@ -2,6 +2,7 @@
 title: Pronunciation dictionaries
 subtitle: Control how your AI assistant pronounces specific words and phrases
 slug: assistants/pronunciation-dictionaries
+description: Control how a Vapi assistant pronounces specific words, names, and acronyms using pronunciation dictionaries with phoneme and alias rules by voice provider.
 ---
 
 ## Overview

diff --git a/fern/assistants/quickstart.mdx b/fern/assistants/quickstart.mdx
@@ -2,6 +2,7 @@
 title: Assistants quickstart
 subtitle: Build your first assistant and make a phone call in minutes
 slug: assistants/quickstart
+description: Build your first Vapi assistant, connect it to a phone number, and make a call, working through the steps in the Dashboard or with the Vapi API.
 ---
 
 ## Overview

diff --git a/fern/assistants/structured-outputs-examples.mdx b/fern/assistants/structured-outputs-examples.mdx
@@ -2,6 +2,7 @@
 title: Structured outputs examples
 subtitle: Real-world examples and templates for common use cases
 slug: assistants/structured-outputs-examples
+description: Production-ready structured outputs examples for Vapi, with complete schemas, configuration, and integration code for common business scenarios.
 ---
 
 ## Overview

diff --git a/fern/assistants/voice-formatting-plan.mdx b/fern/assistants/voice-formatting-plan.mdx
@@ -2,6 +2,7 @@
 title: Voice formatting plan
 subtitle: Format LLM output for natural-sounding speech
 slug: assistants/voice-formatting-plan
+description: Format Vapi LLM output for natural-sounding speech, expanding numbers, currency, and symbols so text-to-speech reads them clearly, enabled by default.
 ---
 
 ## Overview

diff --git a/fern/calls/call-ended-reason.mdx b/fern/calls/call-ended-reason.mdx
@@ -2,6 +2,7 @@
 title: Call ended reasons
 subtitle: All possible call ended reason codes and what they mean.
 slug: calls/call-ended-reason
+description: Understand Vapi endedReason codes that explain why a call ended, where to find them in call logs and the Call object, and how to diagnose each one.
 ---
 
 Every call in Vapi ends with an `endedReason` code that tells you exactly why it ended. You can find this value in the **"Ended Reason"** column of your [call logs](https://dashboard.vapi.ai/calls), or under the `endedReason` field on the [Call object](/api-reference/calls/get).

diff --git a/fern/calls/call-features.mdx b/fern/calls/call-features.mdx
@@ -1,6 +1,7 @@
 ---
 title: Live Call Control
 slug: calls/call-features
+description: Control live Vapi calls in real time with Call Control to inject conversation elements and Call Listen to stream call audio over a WebSocket connection.
 ---
 
 Vapi offers two main features that provide enhanced control over live calls:

diff --git a/fern/calls/call-handling-with-vapi-and-twilio.mdx b/fern/calls/call-handling-with-vapi-and-twilio.mdx
@@ -1,6 +1,7 @@
 ---
 title: Call Handling with Vapi and Twilio
 slug: calls/call-handling-with-vapi-and-twilio
+description: Keep a caller on hold while dialing a specialist using Vapi and Twilio, with a fallback action when the specialist misses the call or it reaches voicemail.
 ---
 
 This document explains how to handle a scenario where a user is on hold while the system attempts to connect them to a specialist. If the specialist does not pick up within X seconds or if the call hits voicemail, we take an alternate action (like playing an announcement or scheduling an appointment). This solution integrates Vapi.ai for AI-driven conversations and Twilio for call bridging.

diff --git a/fern/calls/call-outbound.mdx b/fern/calls/call-outbound.mdx
@@ -2,6 +2,7 @@
 title: Outbound Calling
 subtitle: Learn how to send outbound calls from Vapi.
 slug: calls/outbound-calling
+description: Send outbound calls from Vapi programmatically, placing single or batch calls and scheduling them for reminders, surveys, and automated call campaigns.
 ---
 
 ## Introduction to Outbound Calling

diff --git a/fern/calls/troubleshoot-call-errors.mdx b/fern/calls/troubleshoot-call-errors.mdx
@@ -2,6 +2,7 @@
 title: Troubleshoot call errors
 subtitle: Learn to diagnose failed calls based on what the caller experienced.
 slug: calls/troubleshoot-call-errors
+description: Diagnose failed Vapi calls by what the caller experienced, with errors organized by symptom so you can jump to the right fix for each call failure.
 ---
 
 ## Overview

diff --git a/fern/calls/troubleshoot-call-forwarding-drops.mdx b/fern/calls/troubleshoot-call-forwarding-drops.mdx
@@ -1,6 +1,7 @@
 ---
 title: "Debug call forwarding drops"
 subtitle: "Learn to troubleshoot calls that drop immediately after initiating transfer"
+description: Troubleshoot Vapi calls that drop immediately after a transfer, finding why forwarding disconnects both parties and how to resolve the underlying cause.
 ---
 
 ## Overview

diff --git a/fern/calls/voicemail-detection.mdx b/fern/calls/voicemail-detection.mdx
@@ -1,6 +1,7 @@
 ---
 title: Voicemail Detection
 slug: calls/voicemail-detection
+description: Detect voicemail on outbound Vapi calls to handle it faster and more flexibly, keeping your voice agents efficient when a call reaches an answering machine.
 ---
 
 When you're running outbound voice agents, voicemails are a reality — but wasting time or missing opportunities because of them shouldn't be.

diff --git a/fern/composer.mdx b/fern/composer.mdx
@@ -2,6 +2,7 @@
 title: Composer
 subtitle: Build and configure voice AI agents through natural conversation
 slug: composer
+description: Build and configure Vapi voice agents through natural conversation with Composer, which creates assistants, sets up numbers and integrations, and troubleshoots.
 ---
 
 <Warning>

diff --git a/fern/customization/custom-keywords.mdx b/fern/customization/custom-keywords.mdx
@@ -2,6 +2,7 @@
 title: Keywords and keyterm prompting
 subtitle: Boost STT accuracy for domain words and phrases
 slug: customization/custom-keywords
+description: Boost Vapi transcription accuracy for domain terms and proper nouns using Deepgram keyword boosting and AssemblyAI keyterm prompting on your assistant.
 ---
 
 

diff --git a/fern/customization/custom-llm/fine-tuned-openai-models.mdx b/fern/customization/custom-llm/fine-tuned-openai-models.mdx
@@ -2,6 +2,7 @@
 title: Fine-tuned OpenAI models
 subtitle: Use Another LLM or Your Own Server
 slug: customization/custom-llm/fine-tuned-openai-models
+description: Use fine-tuned or OpenAI-compatible models as your Vapi LLM, connecting endpoints like OpenRouter, Together AI, or your own server to power an assistant.
 ---
 
 

diff --git a/fern/customization/custom-llm/tool-calling-integration.mdx b/fern/customization/custom-llm/tool-calling-integration.mdx
@@ -1,6 +1,7 @@
 ---
 title: Custom LLM Tool Calling Integration
 slug: customization/tool-calling-integration
+description: Add tool calling to a custom LLM in Vapi so your model can trigger external functions and actions mid-conversation, with the request and response format.
 ---
 ## What Is a Custom LLM and Why Use It?
 

diff --git a/fern/customization/custom-llm/using-your-server.mdx b/fern/customization/custom-llm/using-your-server.mdx
@@ -1,6 +1,7 @@
 ---
 title: 'Connecting Your Custom LLM to Vapi: A Comprehensive Guide'
 slug: customization/custom-llm/using-your-server
+description: Connect your own server as a custom LLM in Vapi, walking through an OpenAI-compatible setup with Ngrok to handle the request and response flow end to end.
 ---
 
 

diff --git a/fern/customization/custom-transcriber.mdx b/fern/customization/custom-transcriber.mdx
@@ -2,6 +2,7 @@
 title: Custom transcriber
 subtitle: Integrate your own transcription service with Vapi
 slug: customization/custom-transcriber
+description: Integrate your own transcription service with Vapi instead of a built-in provider, using a custom transcriber, shown here with a Deepgram setup.
 ---
 ## Overview
 

diff --git a/fern/customization/custom-tts.mdx b/fern/customization/custom-tts.mdx
@@ -2,6 +2,7 @@
 title: Custom TTS integration
 subtitle: Learn to integrate your own text-to-speech system with VAPI
 slug: customization/custom-voices/custom-tts
+description: Integrate your own text-to-speech system with Vapi for full control over voice synthesis, using any TTS provider while keeping real-time performance.
 ---
 
 ## Overview

diff --git a/fern/customization/custom-voices/custom-voice.mdx b/fern/customization/custom-voices/custom-voice.mdx
@@ -2,6 +2,7 @@
 title: Custom voices
 subtitle: Use a custom voice with your preferred provider
 slug: customization/custom-voices/custom-voice
+description: Use a custom voice from any supported provider in Vapi by setting the voice property in your assistant configuration with the provider's voice details.
 ---
 
 You can use your own custom voice with any supported provider by setting the `voice` property in your assistant configuration:

diff --git a/fern/customization/custom-voices/elevenlabs.mdx b/fern/customization/custom-voices/elevenlabs.mdx
@@ -2,6 +2,7 @@
 title: ElevenLabs
 subtitle: Set up a custom ElevenLabs voice in Vapi
 slug: customization/custom-voices/elevenlabs
+description: Set up a custom or cloned ElevenLabs voice in Vapi, subscribing to an ElevenLabs API plan and adding your API key and voice ID to your assistant.
 ---
 
 This guide outlines the procedure for integrating your cloned voice with ElevenLabs through the Vapi platform.

diff --git a/fern/customization/custom-voices/playht.mdx b/fern/customization/custom-voices/playht.mdx
@@ -2,6 +2,7 @@
 title: PlayHT
 subtitle: Set up a custom PlayHT voice in Vapi
 slug: customization/custom-voices/playht
+description: Set up a custom PlayHT voice in Vapi, subscribing to a PlayHT API plan and adding your credentials and voice details to your assistant configuration.
 ---
 
 You can use your own custom PlayHT voice with Vapi by following these steps.

diff --git a/fern/customization/jwt-authentication.mdx b/fern/customization/jwt-authentication.mdx
@@ -2,6 +2,7 @@
 title: JWT Authentication
 subtitle: Secure API authentication guide
 slug: customization/jwt-authentication
+description: Authenticate Vapi API requests securely with JWT, covering how to generate a JSON Web Token and use it to authorize your calls to the API.
 ---
 
 This documentation provides an overview of JWT (JSON Web Token) Authentication and demonstrates how to generate a JWT token and use it to authenticate API requests securely.

diff --git a/fern/customization/speech-configuration.mdx b/fern/customization/speech-configuration.mdx
@@ -2,6 +2,7 @@
 title: Speech configuration
 subtitle: Control when your assistant starts and stops speaking
 slug: customization/speech-configuration
+description: Control when a Vapi assistant starts and stops speaking, tuning speech settings to sound natural, avoid interrupting the customer, and reduce awkward pauses.
 ---
 
 ## Overview

diff --git a/fern/debugging.mdx b/fern/debugging.mdx
@@ -2,6 +2,7 @@
 title: Debugging voice agents
 subtitle: Learn to identify, diagnose, and fix common issues with your voice assistants
 slug: debugging
+description: Diagnose and fix voice agent issues using the Vapi dashboard's Call Logs, API Logs, and webhook logs, component testing, and provider status checks.
 ---
 
 ## Overview

diff --git a/fern/enterprise/dev-uat-prod.mdx b/fern/enterprise/dev-uat-prod.mdx
@@ -1,6 +1,7 @@
 ---
 title: Enterprise environments (DEV/UAT/PROD)
 subtitle: Promotion and configuration management for assistants and squads
+description: Promote and manage Vapi assistant and squad configurations across DEV, UAT, and PROD environments, giving enterprise teams a repeatable, auditable workflow.
 ---
 
 ## Purpose

diff --git a/fern/enterprise/plans.mdx b/fern/enterprise/plans.mdx
@@ -2,6 +2,7 @@
 title: Vapi Enterprise
 subtitle: Build and scale with Vapi.
 slug: enterprise/plans
+description: Explore Vapi Enterprise plans for production voice AI, which can include unlimited concurrency, higher rate limits, reserved capacity, and hands-on support.
 ---
 
 If you're building a production application on Vapi, we can help you every step of the way from idea to full-scale deployment.

diff --git a/fern/faq.mdx b/fern/faq.mdx
@@ -2,6 +2,7 @@
 title: Frequently Asked Questions
 subtitle: Frequently asked questions about Vapi.
 slug: faq
+description: Answers to common questions about Vapi, covering use-case fit, latency, pricing at volume, concurrency, compliance, security, and deployment options.
 ---
 
 <Markdown src="./snippets/faq-snippet.mdx" />
diff --git a/fern/glossary.mdx b/fern/glossary.mdx
@@ -2,6 +2,7 @@
 title: Definitions
 subtitle: Useful terms and definitions for Vapi & voice AI applications.
 slug: glossary
+description: Definitions of key voice AI and Vapi terms, from transcription, LLM, and TTS to backchanneling, endpointing, and other concepts used across the docs.
 ---
 
 

diff --git a/fern/guides.mdx b/fern/guides.mdx
@@ -2,6 +2,7 @@
 title: Guides
 subtitle: Explore real-world, cloneable examples to build voice agents with Assistants and Squads
 slug: guides
+description: Browse real-world, cloneable Vapi examples that build voice agents with assistants and squads, from appointment booking to multilingual support routing.
 ---
 
 <Frame>

diff --git a/fern/issue-reporting.mdx b/fern/issue-reporting.mdx
@@ -3,6 +3,7 @@ title: How to Report Issues Effectively
 subtitle: >-
   Learn how to structure your issue reports for fast and accurate resolution
 slug: issue-reporting
+description: Report Vapi issues effectively by including the right call IDs, timestamps, and reproduction details so support can diagnose and resolve them faster.
 ---
 
 To help us assist you as quickly and accurately as possible, it's essential to provide specific and actionable details when reporting issues. Vague messages like "X is not working" slow down the resolution process.

diff --git a/fern/ivr-navigation.mdx b/fern/ivr-navigation.mdx
@@ -2,6 +2,7 @@
 title: IVR Navigation
 subtitle: How to navigate IVR menu systems effectively
 slug: ivr-navigation
+description: Navigate IVR phone menus reliably with Vapi's DTMF tool, using digit pauses, provider-specific pause characters, and prompting tips for accurate input.
 ---
 
 ## Overview