Vapi is a platform for building, deploying and managing AI voice agents that can handle inbound and outbound calls and use external tools and business systems.

Can Vapi agents perform actions during calls?

Yes. Vapi agents can use built in tools, API requests, function tools, knowledge queries, client side tools and MCP tools to perform actions during conversations.

Does Vapi support inbound and outbound calling?

Yes. Assistants can be connected to phone numbers to answer inbound calls and place outbound calls.

Does Vapi support MCP?

Yes. Vapi assistants can connect to MCP compatible servers, discover tools dynamically at runtime and execute actions through those tools during calls.

What are Vapi Squads?

Squads allow multiple specialized assistants to participate in one conversation and hand the call between assistants based on configured conditions.

Can Vapi pass context between assistants?

Yes. Vapi supports passing conversation context, extracted variables and summaries between assistants during handoffs.

Which business integrations does Vapi document?

Vapi documents integrations including Google Calendar, Google Sheets, Slack, GoHighLevel, Make and n8n, along with APIs, webhooks and other platform integrations.

Does Vapi provide tools for testing voice agents?

Yes. The platform includes simulations, evaluations, monitoring and logs for testing and observing agent behavior.

Vapi

Voice AI platform for building, deploying and managing agents that handle inbound and outbound calls, use tools and APIs, connect to business systems and coordinate multi assistant workflows.

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About Vapi

Vapi is a platform for building, deploying and operating AI voice agents. Developers can create assistants, connect them to phone numbers and handle inbound or outbound calls through the dashboard or API.

Vapi agents can use built in tools to transfer calls, end calls, send SMS messages, dial keypad digits and make API requests. Function tools can send tool calls to a developer controlled server, while the Query tool can retrieve information from knowledge bases. Agents can also use client side tools through the Web SDK.

Vapi supports MCP servers, allowing assistants to discover tools dynamically at runtime and execute actions through MCP during calls. Its Squads feature enables multiple specialized assistants to participate in a conversation and hand off between one another while passing context and extracted variables.

The platform also provides monitoring, simulations, evaluations, logs and integrations with business applications. It is designed for developers and teams that need configurable voice agents with programmatic control, external tools and production operations.

Key Features

Inbound and Outbound Calls: Create voice assistants that answer incoming calls and place outbound calls through connected phone numbers.
Tool Execution: Agents can transfer calls, send SMS messages, dial keypad digits, call HTTPS APIs, invoke server functions and query knowledge bases.
MCP Tool Access: Connect assistants to MCP compatible servers and dynamically discover and execute tools during conversations.
Multi Assistant Squads: Coordinate specialized assistants in a single conversation with configurable handoff conditions and context transfer.
Business Integrations: Connect agents with Google Calendar, Google Sheets, Slack, GoHighLevel, Make and n8n for actions and workflow automation.
Testing and Observability: Use simulations, evaluations, monitoring and logs to test and inspect voice agent behavior and production calls.

Pricing

No Success Package: $0/month to start Usage based plan with $0.05 per minute Vapi hosting, model costs passed through at cost, $5 starting credits, 2 organizations, 1 Vapi phone number, 4 concurrent calls and 14 days of raw data retention.
Core: $29/month Includes 2 organizations, 5 Vapi phone numbers, 10 concurrent calls, 30 days of raw data retention, zero data retention support and email support with a 2 business day response SLA.
Pro: 10% of Vapi hosting fees, $999/month minimum Includes 10 organizations, 10 Vapi phone numbers, 30 concurrent calls, 180 days of raw data retention, RBAC, zero data retention, dedicated Slack support and a 99% uptime SLA.
Premier: Custom pricing Includes elevated organization, concurrency and retention limits, custom phone number allowances, priority support, custom RBAC, zero data retention, SSO and dedicated SIP options.
Additional Concurrency: $10 per line/month Adds concurrent call capacity beyond the package allowance.
Additional Organizations: $20 per organization/month Adds additional workspaces beyond the package allowance.
HIPAA Compliance: $2,000/month Provides HIPAA eligible data handling with a standard Data Processing Agreement and Business Associate Agreement.

Use Cases

Customer support and inbound call automation
Appointment scheduling and calendar management
Lead qualification and outbound calling
Multi assistant voice workflows with specialized agent handoffs

Pros & Cons

Pros:

Supports built in tools, direct HTTPS API requests, server controlled functions, knowledge queries and MCP tools.
Squads enable multiple specialized assistants to hand conversations between one another while preserving selected context.
Provides simulations, monitoring, evaluations and multiple log types for testing and production operations.

Cons:

The usage only option includes 4 concurrent calls and 14 days of raw data retention.
Higher concurrency, additional organizations and some compliance capabilities require paid packages or add-ons.

Integrations

Google Calendar, Google Sheets, Slack, GoHighLevel, Make, n8n, OpenAI, Anthropic, ElevenLabs, Deepgram, Cartesia, AssemblyAI, PlayHT, Azure, Gemini, Groq, Perplexity, Gladia, Langfuse, Twilio, AWS S3, Google Cloud, Zendesk, Notion, Zapier, Apollo.io, Salesforce, HubSpot, Five9, Genesys, Avaya, Telnyx, MCP, HTTPS APIs, webhooks