CosVoice MCP Server

About CosVoice

Hosted remote MCP server that gives your AI assistant a real US phone number and email address. It places and answers calls and sends written summaries. Works with Claude, ChatGPT, Cursor and Grok. Remote MCP endpoint: https://cosvoice.com/mcp (OAuth or API key). Paid plans from $29/month.

CosVoice tools (27)

Read from the live server on Nov 10, 2026. These are the tools your AI assistant can call once connected.

get_account

Who this key belongs to and whether a line exists yet.

search_numbers

Find available phone numbers in a US area code for a new line.

create_line

Set up the phone line: claim a number (pick one from search_numbers or just give an area code), name the persona, and register the owner's mobile. An account can own several lines; each needs its own paid plan (if none is waiting, this retu

get_line

Number, email identity, persona, owner, and minutes remaining this period.

place_call

Have the line call a real number and hold a live voice conversation on the owner's behalf. Brief it like a human assistant: who to ask for, what you want, acceptable fallbacks, what to do on voicemail. Set connect_owner when the owner wants

book_reservation

Reserve a table by phone: the line calls the venue, negotiates the time, answers the host's questions (name, callback, email), records policies, and never pays. Give the venue's phone number, party size, date/time, and the acceptable window

list_reservations

Recent reservation requests with their status and the venue's stated policies.

get_call

Status, structured notes, outcome, transcript, and annotations for one call.

list_calls

Recent calls with summaries, newest first.

annotate_call

Attach a note to a call (what you did about it, a decision, context for the owner). Shows in the dashboard next to the debrief.

send_text

Send an SMS from the line's number. Respects STOP opt-outs. Read the delivery field in the result: while CosVoice's carrier registration (10DLC) is in progress, texts from the line may be filtered by US carriers and not arrive; texts to the

ack_instructions

Mark owner instructions (texts the owner sent to the line) as handled so they stop being attached to tool results. Pass the ids from the OWNER INSTRUCTIONS notice, or all: true.

list_messages

Recent texts to and from the line.

list_emails

Email received at and sent from the line's address, newest first (direction inbound|outbound), with forwarding status.

get_email

Full text of one email the line received.

send_email

Send an email from the line's own address (handle@cosvoice.com). Reply to a message the line received by passing reply_to_email_id (recipient and subject fill in, threading is kept), or write to the owner. The line may only email people who

forward_email

Forward one received email to one of the line's own inboxes: its forwarding, notification or Bot inbox, or the owner's sign-in address (defaults to the forwarding inbox). It cannot forward to any other address, and a new inbox must be confi

list_contacts

Owner, approved, VIP, and blocked numbers.

add_contact

Teach the line a number. Roles: approved (reaches the owner), vip (interrupts), blocked (polite wall).

remove_contact

Remove a number from the contacts list (not the owner).

get_settings

Persona, voice, greeting, standing instructions, owner, notifications, forwarding, webhook, Bot push, SMS consent.

update_settings

Change any of: name, voice, greeting, instructions, owner_name, owner_phone, timezone, notify_email, agent_email, morning_brief (daily digest on/off), morning_brief_hour (0–23 local), forward_email, forward_mode (relay|raw|off), sms_opt_in,

set_bot_push

Have CosVoice start YOU the moment something arrives, instead of you polling. Give it the webhook URL and key of a routine of yours that has a Webhook trigger (Grok Bot: Routines → New → trigger Webhook; the URL and a crsr_ key appear). Cos

set_webhook

Set (or clear with an empty url) the HTTPS webhook that receives call.completed, message.received, and email.received. Returns the signing secret once.

list_history

Unified history of calls, texts, and email with optional search. The same table as the dashboard.

recent_activity

Everything since a timestamp: calls, texts, emails. Catch-up when webhooks were missed.

list_integrations

Partner integrations available through this line (groceries, food, reservations, travel…), with status and connect links. Partner tools appear as <partner>__<tool>.

How to connect CosVoice to Claude, Cursor or VS Code

CosVoice runs as a hosted remote MCP server at https://cosvoice.com/mcp. Add that URL to your MCP client's config (Claude Code, Cursor, Windsurf or VS Code) and the tools appear immediately, no install required.

{
  "mcpServers": {
    "cosvoice": {
      "url": "https://cosvoice.com/mcp"
    }
  }
}

Claude Code: claude mcp add --transport http cosvoice https://cosvoice.com/mcp. VS Code's .vscode/mcp.json uses a servers key instead of mcpServers (see how). Servers that require OAuth or an API key will prompt on first use.