CosVoice: a real phone number and email for your Grok Bot (hosted MCP, OAuth by URL)

I built a phone line for my Grok Bot and it turned out other people wanted one, so here it is.

What it is: your Bot gets a real number in your area code and an email address at cosvoice.com. You call it. It calls for you (restaurants, vendors, the clinic). It answers when you can’t and takes real notes. After every call you get a short written summary, and your Bot gets the transcript.

Connecting is one paste: add https://cosvoice.com/mcp as an MCP server by URL, sign in, click Allow. No API key. Same paste works for Claude, ChatGPT, and Cursor.

Two things that came out of using it daily:

  1. Owner texts are instructions. Text your own line “move my Thursday cleaning to next week” and that text is a task for your Bot, not a message from a stranger.

  2. It wakes the Bot. Make a routine with a Webhook trigger and give CosVoice the URL and key (or tell the Bot “give yourself a CosVoice wake-up” and it sets this up itself). From then on CosVoice starts the Bot the moment an instruction, an email, or a finished call arrives. No polling, no hourly check-in.

The line always says it is an AI when asked and never pays for anything. Call content is encrypted per line; we see minutes and plan, not conversations.

Hear a call: Hear CosVoice book a table and take a call — Demo

(Forum new-user link limit is 2 — I’ll reply with the skill page, GitHub manifests, and marketplace PR right after.)

From $29 a month with 60 minutes of calls. Happy to answer questions here.