MCP Vapi Caller

Item: MCP Vapi Caller
Rating: 71
Author: M8ven

Enables Claude to make outbound phone calls through Vapi API, supporting any call type and language with features like call initiation, result polling, and structured data extraction.

→ sebastienfi/mcp-vapi-generic-caller · listed on glama

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// key findings

✅

No credential exfiltration, no sensitive file access, no obfuscation

Static analysis found nothing flowing your secrets to unexpected places.

✅

Open source with a license and README

Anyone can audit the code, the license is declared, and the publisher documents what it does.

// required environment variables

This server reads these from process.env. You'll be asked to provide them before it can run.

configVAPI_VOICE_MODEL— eleven_flash_v2_5 ElevenLabs TTS model

configVAPI_LLM_PROVIDER— anthropic Vapi LLM provider

configVAPI_LLM_MODEL— claude-sonnet-4-6 LLM model (validated against Vapi's Anthropic list)

configVAPI_VOICE_PROVIDER— 11labs TTS provider

configVAPI_VOICE_STABILITY— 0.5 Voice stability (0.0–1.0)

configVAPI_VOICE_SIMILARITY_BOOST— 0.75 Voice similarity boost (0.0–1.0)

configVAPI_VOICE_SPEED— 1.0 Speech speed

configDEFAULT_LANGUAGE— fr Default BCP-47 call language

configDEFAULT_CALLER_NAME— Who the agent calls on behalf of

configMCP_TRANSPORT— This exposes the MCP server on http://localhost:8000 (=streamable-http). Point an HTTP-capable MCP client at it. For local Claude Code/Desktop use, the stdio setup above is simpler.

// full audit trail

The full breakdown of what we checked, the deductions that landed, the network hosts, the dependency advisories, and concrete fix guidance is available to verified publishers.

// improvement guidance — verified publishers only

We have 4 concrete improvements we can share with the publisher of this MCP. Each comes with specific guidance to raise the trust score.

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[![M8ven Score](https://m8ven.ai/badge/mcp/sebastienfi-mcp-vapi-generic-caller-1922n3)](https://m8ven.ai/mcp/sebastienfi-mcp-vapi-generic-caller-1922n3)

commit: b396dddadaf3736aed7fbe942286ceea15459351

code hash: 22b45d1a8255db0603a859b1c2d72feb00017ca81f5b5dab7859d4cd313e5ff6

verified: 7/21/2026, 9:20:14 AM

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