"Understanding Call Hierarchy in Software Development or Programming" matching MCP servers:

MCP server that enables AI agents to place real Telegram voice calls and speak a message aloud via TTS, with configurable repeats and call handling.

Bi-directional communication for Claude Code via Voice Calls, SMS, and WhatsApp, allowing users to call Claude, receive callbacks, and interact through multiple channels.

Enables an AI agent to place outbound phone calls through the user's own Twilio account, delivering a spoken message or asking a single question and returning the recipient's transcribed reply to the agent. It exposes just two tools—one-way notifications and one-question calls to a fixed, preconfigured number with built-in rate limits and guardrails.

An MCP server that enables AI agents to pause and request human approval or information via Slack, Telegram, or macOS dialogs before proceeding with actions.

Read-only MCP server for Twilio call data, providing tools to search calls, fetch recordings and transcripts, list agents, and generate summaries while explicitly handling timezone and duration measurement discrepancies.

A Model Context Protocol server that enables AI assistants like Claude to initiate and manage real-time voice calls using Twilio and OpenAI's voice models.

Enables Poke to place real outbound phone calls using ElevenLabs Conversational AI and Twilio, with tools to manage calls and receive summaries.

An MCP server that lets you schedule AI phone calls and manage Leximo assignments directly from Claude Desktop or Claude Code.

Enables AI-driven interaction with Twilio call services, including initiating outbound calls and retrieving call history via FastMCP tools.

FastMCP cloud server enabling AI assistants to manage outbound call campaigns, schedule calls, list agents, and access call data via HTTP.

Enables AI agents to interact with Slack through 20 specialized tools and resources for managing channels, messages, users, and files. It features built-in rate limit handling, safety controls for message sending, and full support for Slack Block Kit formatting.

Call, text, or push your phone when an agent needs input mid-task — reply by voice instead of babysitting a long-running or blocked terminal.

MCP server for Vapi.ai that enables AI coding assistants to manage voice assistants, make outbound calls, and access call history directly from their development environment.

Enables Telegram analytics (channel stats, search, sentiment) via MCP tools with pay-per-call in USDC, no API keys needed.

Enables AI coding agents to join a chat-software-style collaboration hub as a hierarchy tree, where agent nodes exchange messages with blocking sends and four-level read receipts, pull inboxes, acknowledge reads, inspect the roster and conversation history, create groups or broadcast to everyone under an approval gate, and request human or peer decisions via blocking ask/respond_ask cards.

Wraps Claude Code as a server using the Model Context Protocol (MCP), allowing teams to interact with Claude Code through a Slack bot interface.

Enables AI agents to manage Rostelecom Virtual PBX telephony, including contacts, subscribers, call groups, call history, call recordings, numbers and routing, balance, and transparent proxy to any of ~240 endpoints.

MCP server exposing Dialpad call details, transcripts, and call initiation as tools for use in Claude Desktop and Claude Code.

A Model Context Protocol (MCP) server for interacting with Microsoft 365 and Microsoft Office services through the Graph API.

Enables AI agents to send a distress call to a Discord channel and wait for human input, capturing replies or reactions to resume work.