Can Tab Make Phone Calls? One Way, and Not Reliably
Barely. Tab, the texting agent at tab.bot, can dial a business for you when you text it. That’s where its phone ability ends. It can’t answer your phone. You can’t call it. It doesn’t know who’s calling you. In independent testing, the calls rarely turned into the booking or purchase they were for. And Tab has already gone down twice since it launched on October 6.
If you need calls you can count on, in both directions, Carly answers your line, calls people for you, calls you on schedule, and remembers every caller. Copy this prompt into ChatGPT or Claude. That’s it. It sets up Carly, phone number included.
Carly business setup prompt
Copy this into ChatGPT or Claude. It sets everything up, phone number included.
Help me connect Carly Teams so I can work with my organization's business texts, phone calls, voicemail and voice/text agents from this chat. I'll add it to you myself: tell me exactly what to click for the app you are, one step at a time, and wait for me to confirm before moving on. If a step doesn't match what I see, ask me what's on my screen. If you can do the setup yourself (Claude Code, Codex, Muse, Grok Bot), go ahead, and ask me for any key in your secure credential prompt, never in the chat. Don't tell me it's connected until list_phone_lines works, and if I have several teams, ask which to use. Before sending a text or making a call, confirm the team, recipient and message or task with me. The steps are below.
# Connect Carly Teams to an AI app
> Carly Teams works a team's business phone lines through the team's AI agents: business texts, phone calls, voicemail, the voice and text agents, and the team's CRM.
MCP server: https://carlyassistant.com/team/mcp (streamable HTTP, OAuth)
## Setup
Carly Teams isn't in any plugin or connector directory yet, so it's added as a custom connection by URL.
1. Add Carly Teams:
- ChatGPT: open https://chatgpt.com/plugins, click Add, and choose Create MCP App (not Create plugin or Upload plugin archive). If Create MCP App isn't on the menu, turn on Developer mode first in Settings > Security and login. Name it "Carly Teams" with the description "Work with my team's business texts, calls, voicemail and voice/text agents," paste https://carlyassistant.com/team/mcp as the server URL, choose OAuth, create it, and sign in. Then in the message box open the + menu, choose Developer mode, and pick Carly Teams. No plugin needs to be built, packaged or uploaded.
- Claude (claude.ai, Claude Desktop, or Cowork): Customize > Connectors > Add custom connector, name it Carly Teams, paste https://carlyassistant.com/team/mcp, and sign in.
- Claude Code: `claude mcp add --transport http --scope user carly-teams https://carlyassistant.com/team/mcp`, then /mcp, pick carly-teams, and authenticate.
- Codex: `codex mcp add carly-teams --url https://carlyassistant.com/team/mcp`, then `codex mcp login carly-teams`.
- Cursor: add {"mcpServers": {"carly-teams": {"url": "https://carlyassistant.com/team/mcp"}}} to ~/.cursor/mcp.json, then sign in to carly-teams from Customize.
- Muse: a custom connector to https://carlyassistant.com/team/mcp with a Carly API key as its bearer token. The key comes from carlyassistant.com/integrations (Advanced > API Keys > Create a new key, with Owner set to the team and all scopes selected) and goes in Muse's connector settings, not in a chat message.
- Grok: grok.com/connectors > New Connector > Custom, paste https://carlyassistant.com/team/mcp, and sign in.
- Grok Bot: a custom remote MCP server named carly-teams at https://carlyassistant.com/team/mcp. Approve it and sign in.
- Perplexity: Plugins in the sidebar (or Customize > Connectors), then Add custom > Connector > Add MCP connector. Choose Remote, name it Carly Teams, paste https://carlyassistant.com/team/mcp, pick OAuth, check the box and click Add, then click the Carly Teams card to sign in.
- Anything else: a remote MCP server (streamable HTTP) named carly-teams at https://carlyassistant.com/team/mcp. It signs in with OAuth.
Sign in with the Carly account that belongs to the organization.
2. Once it's added, the Carly Teams tools show up in the chat, including list_phone_lines. If they don't, turn Carly Teams on for the chat or start a new chat.
3. To check it worked, call list_phone_lines: it returns the teams and phone lines the account can reach. A team with no phone line yet can get one with find_numbers (optionally by area code) and get_number, which may return a checkout link to finish.
4. Something to try first: "Review our missed calls and voicemail and help me reply to customers." Carly Teams also reads and answers business texts, has the team's agent make calls, and edits the voice and text agents. Texts and calls go out at once from the agent's number and can't be taken back. Team permissions apply.
## Email, calendars and workflows
Email, calendars, files, booking pages and workflows are the regular Carly connector, added separately. It's listed in ChatGPT's plugin directory (https://chatgpt.com/plugins/plugin_asdk_app_6a67a26316b88191860222f918d4ec54) and Claude's connector directory (https://claude.ai/directory/carly), and connects anywhere else at https://carlyassistant.com/mcp/. Its setup is https://carlyassistant.com/mcp.txt.Tab’s calls only go one way
Tab has its own phone number, and it uses it to call out: a restaurant, a hotel, a doctor’s office. You text the request, it dials, and it texts you back.
Everything Tab publishes, its site, its terms, its privacy policy and its changelog, describes calls Tab places for you. None of it describes calls coming in. There’s no line for your clients, no way to call Tab yourself, and no voicemail it picks up for you. Half of a phone is missing.
What Tab’s calls can’t do
- Answer your phone. A client, a lead or a customer calls you, and they still get your voicemail.
- Take your call. You can’t ring Tab and talk to it while you drive. It’s text only.
- Know who’s calling. Tab never answers a call, so there’s no caller lookup, no greeting by name, and nothing logged to the caller’s record.
- Call you when it should. A Tab user we spoke with this week said it doesn’t reliably call him when asked. Tab’s own changelog says a reminder can run late when it’s busy with another task.
- Finish what the call was for. See the test results below.
- Work for a business. No business line, no shared inbox, no CRM, no team. And Outlook isn’t listed: Tab connects through one Google sign-in.
Tab has gone down twice in its first two weeks
Tab launched on October 6. Two days later, its founder Brennan Erbz posted: “If anyone is having issues with Tab, or Tab is misbehaving or being slow, please give us 60 min.” He blamed “unprecedented demand and usage,” and followed up that a fix would be live within 30 minutes.
On October 17 it happened again. A user posted that Tab had stopped replying. Erbz answered “Please give us 60 min,” and the user reported it was back about five hours after first posting.
We found no status page for Tab. When it goes quiet, the founder’s X account is where you find out why. That’s fine for a beta toy. It’s not fine for the call that books your client.
What independent testing found
Assistant Benchmark, an independent site that tests AI assistants, ran Tab through its tasks from October 7 to 14, 2026. Dialing the phone went fine: Tab called a restaurant within a minute, and on X one user had it call Apple and get a refund in five minutes. Getting the job done is where it fell apart:
| Test | Score | What happened |
|---|---|---|
| Online tasks | 3 out of 10 | Three tries at a table for two, by website and by phone. None booked. One hold expired while it was still filling the form. |
| Purchasing | 4 out of 10 | Had a bouquet ready to buy, switched to another option, and the signup code expired before it ordered. |
| Travel | 5 out of 10 | Found flights in ten minutes, then spent nearly an hour on the airline site and never finished. |
| Memory | 6 out of 10 | Booked a Saturday dinner without checking the trip it had planned for that same weekend. |
| Overall | 6.3 | Instinct scored 8.3 and Meta Muse 9.2 on the same benchmark. |
What a Tab user told us
We talked to a Tab user this week. His complaints were blunt: Tab is unreliable, it doesn’t always call him, it can’t take inbound calls, and it doesn’t remember anyone.
What Tab’s own terms say
Tab doesn’t promise its calls will work. Its terms say it does not promise the service will “always be available, accurate, complete, secure, or error-free, or that every request, call, website action, connection, purchase, or delivery will succeed.” Liability is capped at the greater of $100 or what you paid in the past year, beta features “may change or be unavailable,” and there’s no published price. The privacy policy says recordings and transcripts exist only when that feature is switched on.
Carly: calls that work both ways, every time
Carly is built around your phone, email and calendar. You write the rules once in plain English, and it follows them the same way on the first call of the day and the hundredth.
- Answers your phone 24/7, or only the calls you miss. English or Spanish, whichever the caller speaks.
- Knows who’s calling. Every number is looked up in your CRM. People you know are greeted by name, with their record and upcoming appointments in hand.
- Books callers on your real Google or Outlook calendar while they’re on the line.
- Calls you. “Call me every weekday at 8am with my day.” Miss it and the rundown lands in your email.
- Takes your call. Ring your Carly number from your own phone: “Hi Josh, what can I do?”
- Calls people for you. “Call Emily back about the quote and book her for Thursday.” Then it writes up what happened. If a machine answers, it leaves the voicemail you wrote, word for word.
- Texts back every missed call within seconds, from your number.
- Screens your calls. Trusted contacts get through, blocked numbers get ignored, everyone else gets helped.
- Remembers everything. Every call, transcript, voicemail and text lands on the person’s record.
- Lets you steer a live call from ChatGPT or Claude. Type “ask if Friday works” and it asks.
- Starts workflows from any call. Carly connects to thousands of apps, so a call can update HubSpot, post to Slack or open a task with a workflow.
Tab vs Carly on phone calls
| Tab | Carly | |
|---|---|---|
| Calls businesses for you | Yes | Yes, with a written report |
| Answers your phone | No | Yes, 24/7 or missed calls only |
| You can call it | No | Yes |
| Calls you on schedule | Not reliably | Yes, any time you set |
| Knows who’s calling | No | Yes, from your CRM |
| Texts back missed calls | No | Yes |
| Business line and team inbox | No | Yes |
| Outlook | Not listed | Yes |
| Price | None published, beta | Free Zapier-style workflows; AI agents from $35/month |
Get started with Carly, or see Carly vs Tab and Tab alternatives.
FAQ
Can Tab answer my phone?
No. Tab only places calls. To have AI answer your line, use Carly.
Can I call Tab?
Tab’s site and terms describe texting only, in iMessage or WhatsApp. You can call your Carly number and talk to Carly.
Why didn’t Tab call me?
Tab’s own changelog says a reminder can run late when it’s busy with another task, and its terms don’t promise any call will go through. If you need a call at a set time, Carly calls you on schedule and emails you if you miss it.
Is Tab reliable for phone calls?
Not yet. It scored 3 out of 10 on online tasks in independent testing, with bookings that never finished, and it went down twice in its first two weeks. More in our Tab AI review.
Why is Tab not replying?
Tab has had at least two slowdowns since launch, on October 8 and October 17, and its founder asked users to give it 60 minutes both times. There’s no status page, so check his posts on X. If you need an assistant that answers every time, try Carly.
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"Before Carly, I relied on a Calendly link, but the whole process felt impersonal and not very professional. Carly changed that by handling all the back-and-forth, so I'm no longer stuck in endless email threads trying to line up schedules.
Now Carly reaches out to candidates, shares my real-time availability, lets them pick a slot, then sends a Zoom link and drops it straight into my calendar. She sends reminders to both of us before each call, which has significantly reduced no-shows and last-minute confusion.
On top of scheduling, Carly acts like a full executive assistant, sending me my schedule the night before so I can prepare for each call. It reminds me of the old x.ai assistant, but Carly is noticeably smarter, faster, and better suited to my healthcare recruitment business."
