CosVoice: A phone number for your Chief of Staff
Gives an AI assistant a phone number so it can make calls, answer calls, text, and send written summaries.
About CosVoice: A phone number for your Chief of Staff
1. CosVoice gives a Chief of Staff-style AI assistant a real phone number and email address. It is built so users can call or text the assistant, ask it to make calls, and forward missed calls to it.
The homepage describes three main flows: the user calls the line, the assistant calls for the user, and the assistant answers when the user cannot. After calls, CosVoice sends a short written summary and can provide a transcript.
For assistant connectivity, CosVoice lists support for Grok Bot, Claude, ChatGPT, Cursor, Meta’s Muse, MCP assistants, REST API access, and signed webhooks. The site also states that an assistant can be connected by adding mcp.
Pricing is based mainly on call minutes. The site lists a one-time $3 Activation with 10 minutes for 14 days, plus monthly Starter, Plus, and Pro plans with larger minute allowances.
Features
- Provides AI assistant a local phone number with email
- Summarizes calls with key info and decisions
- Connects to Grok Bot, ChatGPT, Claude via MCP URL
- Plus includes 200 call minutes, approved VIP callers, and custom voice, style, and greeting
- Every call ends with a debrief and transcript in the dashboard, inbox, and assistant chat
Use cases
- Forward missed calls to AI assistant for detailed responses
- Have assistant book restaurant reservations by phone
- Let assistant gather quotes and details on contractor callbacks
- Capture contractor callback details such as price, dates, options, and next steps
- Send call outcomes as a share card with phone numbers hidden unless included
Screenshots
Frequently asked questions
How does my AI assistant get connected to the phone number?
You add CosVoice as an MCP server via a URL, allowing your AI assistant to send and receive calls through the number.
What happens after the assistant completes a call?
CosVoice sends you a short written summary of the call with important details and any decisions you need to make.
Can CosVoice work with any AI assistant?
CosVoice connects to assistants that support the MCP protocol such as Grok Bot, ChatGPT, Claude, and Meta's Muse.
Can it spend money on calls?
No. The site states it never gives out a card number or agrees to a charge on a call
How are minutes counted?
Connected call time, inbound or outbound, is rounded up per call; texts and email do not use minutes
What we verified
- Public API?
- Yes, the FAQ says developers get a REST API and signed webhooks;
- Self-hostable?
- Not stated
- Free tier without a credit card?
- No free tier stated; the entry offer is a one-time $3 Activation
- Pricing model?
- One-time activation plus monthly plans based on included call minutes, with extra-minute usage pricing
- Price?
- $3 Activation, Starter $29/month for 60 minutes, Plus $69/month for 200 minutes, Pro $149/month for 600 minutes, extra minutes $0.25 each
- Data region / hosting location?
- Not stated
- Named integrations?
- Grok Bot, Claude, ChatGPT, Cursor, Meta’s Muse, MCP, Instacart, Uber Eats, DoorDash by phone, OpenTable by phone, Resy by phone, Tock by phone, Google Calendar, Gmail, Calendly, Zoom, Uber, Kiwi.com, Shopify
Could not be verified
- The site does not state hosting region, uptime/SLA, call recording retention period, exact privacy controls for transcripts, refund terms beyond number availability, or whether HIPAA/enterprise compliance options are available.
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