CosVoice
A real phone number and email for your AI Chief of Staff. Calls, bookings by phone, summaries.
Install
Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).
claude mcp add --transport http cosvoice 'https://cosvoice.com/mcp'{
"mcpServers": {
"cosvoice": {
"type": "http",
"url": "https://cosvoice.com/mcp"
}
}
}Documentation
From the project's README on GitHub, refreshed weekly. Links open on GitHub.
Contents
CosVoice for Grok Bot, Claude, ChatGPT, and Cursor
An office for your AI Bot. CosVoice gives an AI assistant a real phone number (in your area code), a real email address, and a desk that keeps notes. The assistant can place calls for you, book restaurants by phone, answer the calls you miss, and read a written summary of every call. The voice on the line is Grok Voice, full duplex, and it always says it is an AI assistant when asked.
Website: https://cosvoice.com · Setup page written for the assistant: https://cosvoice.com/skill
Connect in one paste
https://cosvoice.com/mcpAdd that as a remote MCP server (Streamable HTTP). CosVoice uses OAuth 2.1 with PKCE and dynamic client registration, so a CosVoice page opens, you sign in, click Allow, and the assistant is connected. There is no API key to copy.
| Client | How |
|---|---|
| Grok Bot / Grok | Settings → Plugins → add a custom MCP server by URL, or install this plugin |
| Claude (web, desktop, Code) | Add a custom connector / claude mcp add --transport http cosvoice https://cosvoice.com/mcp |
| ChatGPT | Settings → Connectors → add MCP server by URL (developer mode) |
| Cursor | Add to Cursor or paste the URL under Settings → MCP |
Clients that only support a static header can use a key from Settings → Connect your agent as Authorization: Bearer cv_live_….
Then let the assistant set itself up
Send it: "Set up my CosVoice line in area code 949. Call it Lloyd."
It calls search_numbers, shows you options, and create_line. Payment comes first: if no plan is on file, create_line returns a checkout link for you to complete, then the number is issued.
What it can do
| Tool | What it does |
|---|---|
get_account, search_numbers, create_line | First-run setup: check the account, find numbers in an area code, create the line |
place_call | Call a real number and hold a live conversation on your behalf (async; poll get_call) |
book_reservation | Book a table by phone with a time window, fallbacks, seating, occasion, dietary notes |
get_call, list_calls, list_reservations, annotate_call | Summaries, structured details, transcripts, outcomes |
send_text, list_messages | Texts from and to the line (STOP respected) |
list_emails, get_email, forward_email | The line's own inbox |
list_contacts, add_contact, remove_contact | Owner, approved, VIP, blocked callers |
get_settings, update_settings, set_webhook | Persona, voice, greeting, standing instructions, call.completed webhooks |
ack_instructions | Texts you send the line from your own phone arrive as instructions on every tool result; acknowledge when handled |
list_history, recent_activity, list_integrations | Unified history, catch-up since a timestamp, partner tools |
What this repo contains
skills/cosvoice/SKILL.md— the skill (same text as https://cosvoice.com/skill).mcp.json— the hosted server entry (type: http, OAuth).grok-plugin/plugin.jsonand.claude-plugin/plugin.json— plugin manifestsserver.json— the official MCP Registry entry (com.cosvoice/cosvoice)
No code runs on your machine. The plugin only points your client at the hosted server.
Rules the line follows
Never pays or reads out a card. Always says it is an AI assistant when asked. Uses its own number and email as the callback unless you say otherwise. Never claims a booking unless the call outcome says so. Respects STOP for texts.
Pricing
Starter $29/mo (60 min), Plus $69/mo (200 min), Pro $149/mo (600 min), overage $0.25/min. One number per paid month. Details: https://cosvoice.com/pricing
Links
Trust and safety: https://cosvoice.com/trust · FAQ: https://cosvoice.com/faq · Privacy: https://cosvoice.com/privacy · Terms: https://cosvoice.com/terms · Support: hello@cosvoice.com
MIT licensed. CosVoice is a product of MimesisIQ.
Frequently asked questions
What is CosVoice?
A real phone number and email for your AI Chief of Staff. Calls, bookings by phone, summaries.
How do I install CosVoice?
It runs as a remote server. In Claude Code: claude mcp add --transport http cosvoice 'https://cosvoice.com/mcp'. For other clients, paste the JSON configuration from this page into their MCP settings.
Does CosVoice need an API key?
Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.
Is CosVoice open source?
Yes. Its code is on GitHub under the MIT license.
Who maintains CosVoice?
It is published by andyfathollahi. AI.tn lists it but does not maintain or endorse it.
From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.