How to connect ChatGPT to Facebook Messenger
Plenty of local businesses get their best enquiries on Facebook: someone sees a post in a community group, taps Message, and asks for a price. Those chats need a quick, clear answer, and they arrive while you are out working. With Spaces, ChatGPT can read your Messenger conversations, work out what each person needs, and reply from your own Facebook account. This guide covers the setup, a worked example from a mobile service business, how to turn enquiries into bookings, and why Messenger has lower limits than other channels.
What you need
- A ChatGPT account that can add custom connectors. OpenAI decides which plans can do this, and it changes from time to time, so check their help pages if you cannot find the option.
- A Spaces account. Your trial starts when you connect a chat account, with no card needed.
- The Messenger account your customers already message you on.
- A short note about your business: what you sell, prices, opening hours and the things you never want promised. You will paste it into ChatGPT later.
- About ten minutes for the setup, and a little longer to try it on a few real messages.
Step 1: connect your Messenger account to Spaces
You sign in to Facebook through a secure link and approve the connection. Your account stays yours, and you keep using it on your phone as normal.
Once it is connected, the account shows in your Spaces dashboard. Connecting does not send anything. It only means Spaces can read and send on that account when an AI agent you have added asks it to.
Connect the Facebook account your customers message. ChatGPT will be able to read every Messenger conversation on it, including personal ones, so if you can, keep business chats on the account you use for the business.
Step 2: add Spaces to ChatGPT
- In ChatGPT, open Settings, then Apps & Connectors, then Advanced, and turn on Developer mode.
- Create a connector named Spaces with the URL https://api.spacesos.com/mcp, and choose OAuth.
- Sign in to Spaces and approve access, then turn the connector on in a chat.
- Menu names and which plans can add connectors change from time to time. OpenAI’s help page has the current steps.
To check it worked: The connector page lists the Spaces tools.
You sign in on Spaces' own page during this step, so ChatGPT never sees your Messenger login or your Spaces password. If Spaces does not show up:
- Open a new chat and check the Spaces connector is turned on in it.
- Sign in to Spaces again from the connector, in case the first sign-in did not finish.
- Remove the connector and add it again, checking the address is exactly https://api.spacesos.com/mcp.
- If it still does not appear, OpenAI's help pages have their current steps, and our ChatGPT setup page has ours.
Step 3: try it
Open a new chat in ChatGPT, make sure Spaces is turned on, and ask in plain words:
- Show me new Messenger enquiries from today.
- Which Messenger chats asked for a price and have not had one yet?
- Draft a quote reply for each one using my price list, and show me first.
- Who did I quote last week that has not replied?
Start with a question that only reads, like the first one. It shows you that ChatGPT can see your Messenger messages before you let it send anything. Then try a draft, read it carefully, and only then let it send.
Good to know
ChatGPT acts when you ask it to in a chat. It does not watch your inbox on its own. For replies around the clock, use an agent that runs all the time, such as Claude Code, Codex, OpenClaw or Hermes, or set up a Spaces routine that sends set replies to set questions.
In practice, treat ChatGPT as a quick helper you sit down with a few times a day: first thing, at lunchtime and before you close. Each time, ask what came in, check its drafts and let it send the ones you are happy with. Customers who message in between wait until your next session, just as they would if you were answering by hand.
A Spaces routine is not an AI. It sends a reply you wrote in advance when something happens, such as a new message or a keyword. That makes it a good way to send "Thanks for your message, we will reply first thing tomorrow" after hours, while ChatGPT writes the real answers in your next session.
Messenger is built for conversations people start. Use ChatGPT to answer enquiries quickly and well, and leave starting new chats for rare cases with people who know you.
A worked example: quotes for a mobile valeting business
Here is a lunchtime session for a one-person car valeting business that gets most of its work from local Facebook groups. Names and details are examples.
| Who | Message |
|---|---|
| You, to ChatGPT | Show me new Messenger enquiries from today. |
| ChatGPT | Four enquiries. Gemma asks the price of a full valet for a family SUV. Kofi asks if you do just the inside. Mark asks if you can come to his work car park on Friday. Sian asks whether you remove dog hair. |
| You | Draft quote replies from my price list. I can do Friday morning for Mark. |
| ChatGPT | Gemma: "Hi Gemma, a full valet for an SUV is £85 and takes about three hours. I come to you, so I just need a parking space and a water tap nearby. Would you like a date?" Kofi: "Hi Kofi, yes, an interior-only valet is £45." Mark: "Hi Mark, Friday morning works. Could you send the postcode of the car park and a rough time?" Sian: "Hi Sian, yes, dog hair removal is £15 extra, and it makes a big difference." |
| You | Send them. |
| ChatGPT | Sent four replies from your Facebook account. |
Each reply goes out at least 20 seconds after the last. ChatGPT asked Mark for the details rather than confirming a time, because the owner's note says to let him confirm bookings himself.
Give ChatGPT your price list
Most Messenger enquiries are some version of "how much?". A clear price list in your note means ChatGPT can answer them properly the first time. Paste it at the start of each chat:
About us: Shine Mobile Valeting, one person, I come to you. Area: 10 miles of town.
Prices: full valet car £70, SUV or van £85. Interior only £45. Exterior only £35. Dog hair £15 extra.
Times: Mon-Sat, 8am-5pm. A full valet takes about three hours.
I need: a parking space and access to a water tap. I bring my own power.
Bookings: never confirm a date or time. Offer days I give you and ask for the postcode.
Payment: on the day, by card or bank transfer. Never send bank details in Messenger.
Tone: friendly, short, first names.When you put prices up, change the note before your next session. ChatGPT will quote whatever the note says.
From enquiry to booking
- Answer the question asked, with the price, in the first reply.
- Ask one question that moves things on, such as the date or the postcode.
- When they reply, check your diary yourself and confirm the slot.
- Ask ChatGPT, a few days later, who you quoted that has not replied, and send a single short follow-up to the ones worth it.
- Stop there. One follow-up is helpful. Two starts to feel like pressure.
Why Messenger has lower limits
Facebook watches personal accounts closely, so Spaces keeps Messenger lower than its other channels: up to 40 messages a day and 8 new conversations a day, with 3 a day in the first week. Like Instagram, Messenger limits messages to people who have not replied, so replies in existing chats work best.
For a small local business that is usually plenty, because nearly every message is a reply to an enquiry. If a post goes viral and you get more than that in a day, answer the most promising enquiries through ChatGPT and the rest by hand.
What to let ChatGPT answer
| They ask | Let ChatGPT |
|---|---|
| How much is it? | Send, from your price list. |
| Do you cover my area? | Send, from your note. |
| Can you do Friday? | Draft, then you confirm from your diary. |
| Can you do it cheaper? | Draft your listed price. Any discount is your decision. |
| A complaint about a past job | Leave for you. |
| Anything asking for codes, links or payment details | Leave for you, and be suspicious. |
Common mistakes to avoid
- Quoting from an old price list. Update the note when prices change.
- Letting ChatGPT confirm bookings it cannot see. Check your diary first.
- Asking it to message everyone in a Facebook group. Messenger limits messages to people who have not replied, and it is not what the account is for.
- Following up more than once with someone who has gone quiet.
- Sharing bank details in Messenger. Take payment the way you always do.
Summing up
With Spaces, ChatGPT can read your Messenger enquiries, quote from your price list and reply from your own Facebook account, inside the lower limits Messenger needs. Keep the price list current, confirm bookings yourself, and use it to answer the people who messaged you quickly and clearly.
How Spaces keeps your account safe
Whatever you ask, Spaces keeps your Messenger account inside safe limits: at least 20 seconds between messages, up to 40 a day, and 8 new conversations a day at most, with a gentler start for a newly connected account. If your AI tries to go faster, Spaces holds the message and says when it can try again.
New conversations warm up over the first weeks after you connect:
| Since connecting | New chats an hour | New chats a day |
|---|---|---|
| Week 1 | 1 | 3 |
| Weeks 2 to 4 | 3 | 8 |
| After that | 3 | 8 |
Like Instagram, Messenger limits messages to people who have not replied, so replies in existing chats work best.
These are Spaces' own limits. They lower the risk of a restriction, but they cannot remove it, because Messenger makes its own decisions about accounts. Read the note at the top of this page before you connect.
Pricing
FAQ
Does this work for a Facebook Page inbox?
Spaces signs in to your own Facebook account and works with the Messenger conversations on it. It does not go through Meta's Messenger Platform for Pages, and Page comments are not available.
Can ChatGPT answer Marketplace messages too?
Marketplace enquiries arrive in Messenger, so yes. It sees the messages but not your listings, so give it a list of what is still for sale.
Why is the daily limit lower than WhatsApp?
Facebook watches personal accounts closely, so Spaces keeps Messenger lower to protect your account. Replies to enquiries are rarely affected.
Will ChatGPT reply while I am out on a job?
No. It acts when you ask it in a chat and does not watch your messages. A Spaces routine can send a set reply, such as "Thanks, I will reply with a price at lunchtime", when a new message arrives.
Can ChatGPT follow up with people who went quiet?
When you ask, yes. It can find people you quoted who have not replied and draft one short follow-up. Keep it to one, and only for real enquiries.
Can I still use Messenger on my phone?
Yes. Your account stays yours, and replies ChatGPT sends appear in the chats as normal messages from you.
Does ChatGPT see my Facebook password?
No. You sign in to Facebook through Spaces' secure link, and ChatGPT signs in to Spaces. ChatGPT never sees your Facebook login.