CosVoice

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Adds a phone line and inbox to an MCP-capable assistant so it can handle calls and report back in writing.

A service that gives an AI assistant its own phone number and email so it can place and answer calls and return written summaries.

Individuals using AI assistants
Small businesses wanting a front desk
Founders automating calls

Features

AI phone number — A US number in a chosen area code, with its own email address.
MCP connection — Connects to an assistant by pasting one server URL and approving access.
Call summaries — A written summary and transcript after every call.
Missed-call forwarding — Forwards missed mobile calls to the assistant's line.
Outbound calls — Places calls on instruction, including phone menus and hold times.

Pros

Connects to MCP-capable assistants with a single URL
States it never gives out card details on a call
Provides a transcript and summary for each call

Cons

A card is required to start the free trial
Texts sent from the line are limited while carrier registration is pending

Overview

CosVoice gives an AI assistant its own US phone number and email address so it can take part in phone calls. The number is meant to be saved as a contact and, when a call is missed, forwarded so callers reach the assistant instead of voicemail. The assistant can place outbound calls on instruction, work through phone menus and hold times, and answer calls, then produce a written summary and transcript after each one. It connects to MCP-capable assistants, including Grok Bot, ChatGPT, Claude and Cursor, by pasting a single server URL and approving access; a webhook option lets the line wake the assistant when a call, text or email arrives. The line states that it never gives out card details and that only the account holder can change the mobile number, inboxes, plan and PIN. Plans cover a number and a monthly allowance of call minutes, with extra minutes billed separately. Texts sent from the line are limited while carrier registration is pending.