Get a line
Pick a number in your area code. About a minute, from $29 a month.
A dot keeps working after you close ChatGPT. It has its own computer and its own browser. Plenty of places still only answer a phone: the garage, the clinic, the landlord. CosVoice gives your dot a real number in your area code. It rings them, takes the calls you miss, and writes up what was said.
Pick a number in your area code. About a minute, from $29 a month.
Open ChatGPT in a browser. In Settings, under Security and login, turn on Developer mode. Open Plugins, press the plus button, name it CosVoice, and paste https://cosvoice.com/mcp. A CosVoice page opens. Sign in and press Allow. There is no key to paste.
Say what you want in a sentence, including what to accept if the first answer is no. Your dot asks the line. The line does the talking.
Plain sentences. The line works out the conversation.
“Call the three garages on my list for a brake quote and put the answers in a table.”
“Ring the clinic and move my Thursday appointment to an afternoon next week.”
“Call Osteria Mozza and get a table for two on Friday at 7:30. Take 7:00 to 8:30 if that's gone.”
“Check what calls my line took today and tell me which ones need me.”
OpenAI lets you decide what a dot does without asking. If yours asks before every call, allow CosVoice in the dot's Custom Rules.
Your dot gets an id straight away and the write-up when the call ends. A dot keeps working in the background, so it can check back by itself.
On a work account, an admin may need to turn on Developer mode. The other road is a key: make one in Settings, then tell your dot to read cosvoice.com/skill.
When dots launched in September 2026, OpenAI included them with ChatGPT Pro and Business Premium. That is OpenAI's rule, and it may change. CosVoice numbers are in the US and Canada.
No. Your dot writes the brief; the CosVoice line holds the conversation in a natural voice, then hands back the outcome, the details, and the transcript.
They call the line's number. The line answers as your assistant, takes the details, and writes them up. Your dot reads the write-up and acts on it.
No. Calls use your CosVoice plan's minutes, whichever assistant asked for them. Plans start at $29 a month with 100 minutes included.
No. The line never reads out a card number or agrees to a charge, so the most it commits you to is a booking or an appointment.
Also for Grok Bot, Meta's Muse, ChatGPT, Claude, and anything you write yourself.
Free for 7 days with 10 minutes of calls. Then $29 a month unless you cancel.