MCP Vapi Caller
by sebastienfi
Server Configuration
Describes the environment variables required to run the server.
| Name | Required | Description | Default |
|---|---|---|---|
| VAPI_API_KEY | Yes | Vapi API key | |
| MCP_TRANSPORT | No | stdio or streamable-http | stdio |
| VAPI_VOICE_ID | Yes | ElevenLabs voice ID | |
| VAPI_LLM_MODEL | No | LLM model (validated against Vapi's Anthropic list) | claude-sonnet-4-6 |
| DEFAULT_LANGUAGE | No | Default BCP-47 call language | fr |
| VAPI_VOICE_MODEL | No | ElevenLabs TTS model | eleven_flash_v2_5 |
| VAPI_VOICE_SPEED | No | Speech speed | 1.0 |
| VAPI_LLM_PROVIDER | No | Vapi LLM provider | anthropic |
| DEFAULT_CALLER_NAME | No | Who the agent calls on behalf of | |
| VAPI_VOICE_PROVIDER | No | TTS provider | 11labs |
| VAPI_PHONE_NUMBER_ID | Yes | Vapi phone number ID (UUID) | |
| VAPI_VOICE_STABILITY | No | Voice stability (0.0–1.0) | 0.5 |
| VAPI_VOICE_SIMILARITY_BOOST | No | Voice similarity boost (0.0–1.0) | 0.75 |
Capabilities
Server capabilities have not been inspected yet.
Tools
Functions exposed to the LLM to take actions
| Name | Description |
|---|---|
No tools | |
Prompts
Interactive templates invoked by user choice
| Name | Description |
|---|---|
No prompts | |
Resources
Contextual data attached and managed by the client
| Name | Description |
|---|---|
No resources | |
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