vapi

The Vapi MCP server provides a comprehensive interface for building, testing, and deploying conversational AI voice applications. Designed for developers and businesses, this skill integrates Vapi's robust voice infrastructure directly into your workflow, allowing you to create phone agents that handle outbound calling, customer support inquiries, and automated scheduling tasks. By leveraging this tool, you can programmatically manage assistant prompts, configure phone numbers, and define custom function-calling tools that connect your voice agents to external APIs or databases.

• Full lifecycle management for voice assistants: create, update, delete, and list assistants through standardized tool calls.

• Comprehensive call handling: list call histories, retrieve specific call details, and trigger outbound calling campaigns.

• Phone number management: programmatically purchase, configure, and release phone numbers for your voice applications.

• Advanced prompt engineering: access prompt guidelines to optimize conversational flow, identity, and behavior for voice-specific interactions.

• Custom tool integration: create and manage function-calling tools that enable assistants to perform actions like calendar lookups or CRM updates during live calls.

• Secure authentication: utilize OAuth flows to ensure secure access to the Vapi platform without needing to handle raw API keys in your environment.

• Prerequisites: Requires the Vapi MCP server installation via npm and active Vapi platform credentials.

• Setup: Use the provided installation command to add the server to your Claude environment, followed by the login tool to authorize your session.

• Best Practices: Follow the dedicated voice assistant prompt guide, which emphasizes concise responses, single-question flow management, and effective human-handoff strategies.

• Dynamic Capabilities: Use assistant overrides and variable placeholders like {{customerName}} or {{appointmentTime}} to inject real-time context into your voice scripts.

• Development Support: Use the tool in conjunction with local testing scripts, allowing for end-to-end verification of assistant logic and API integration before production deployment.

• Constraints: Be mindful of rate limits and phone carrier regulations when managing high-volume outbound calling campaigns.