# CallZero MCP Server

> Use this tool when you need to integrate phone calling capabilities into AI assistants, enabling them to make outbound calls via the CallZero service. It solves problems related to automated customer outreach, appointment reminders, and other voice-based interactions, providing tools for call management, customizable templates, and memory storage. Ideal for use cases requiring seamless voice communication, such as customer service, telemarketing, or virtual receptionists.

Canonical page: https://skillsregistry.net/skills/callzero-ai-callzero-mcp  
JSON: https://api.skillsregistry.net/v1/skills/callzero-ai-callzero-mcp

## Description

Enables AI assistants to make phone calls via CallZero service, with tools for call management, templates, and memory.

## Trust

- **Trust score (0–1):** 0.69
- **Verification tier:** scanned
- **Last scanned:** 2026-09-03

## Facts

- **Version:** 1.0.0
- **Skill type:** atomic
- **Execution layer:** mcp-remote
- **Runtime environment:** api
- **Category:** other
- **Updated:** 2026-09-03

## Source

- **Source listing:** [Glama](https://glama.ai/mcp/servers/c98a5jiv41)
- **Repository:** <https://github.com/CallZero-ai/CallZero-MCP>

## Use it

Resolve this record through the SkillsRegistry MCP server (no auth, read-only):

```
claude mcp add --transport http --scope user skillsregistry https://api.skillsregistry.net/mcp
```

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_skill",
    "arguments": {
      "slug": "callzero-ai-callzero-mcp"
    }
  }
}
```

REST: `GET https://api.skillsregistry.net/v1/skills/callzero-ai-callzero-mcp` · pull for local use: `GET https://api.skillsregistry.net/v1/skills/callzero-ai-callzero-mcp/pull`

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SkillsRegistry indexes agent skills from public registries and GitHub. Skills we have analysed are scanned with Circle-IR and scored on six dimensions; each listing states its scan coverage. More: https://skillsregistry.net/llms.txt