How to connect Grok to Facebook Messenger
For many local businesses, Facebook is still where customers find you: a recommendation in a village group, a post on a local noticeboard, a friend tagging you. The enquiries then land in Messenger. "Are you free on the 14th?", "How much for a bouncy castle and a slide?", "Do you cover Didsbury?". Grok can sort them and write the replies, and with Spaces connected it can read your Messenger conversations and send those replies from your own account. This guide covers the setup, a worked example from a party hire business, a short list of booked dates Grok can check, and why Messenger needs a lighter touch than other channels.
What you need
- A Grok account that can add custom connectors. xAI 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. The Free plan 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 Grok 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. Grok will be able to read every Messenger conversation on it, including personal ones, so think about which account you connect.
Step 2: add Spaces to Grok
- Go to grok.com/connectors and choose New Connector, then Custom.
- Paste https://api.spacesos.com/mcp as the URL.
- Sign in to Spaces and approve access.
- On Business and Enterprise plans an admin adds the connector first.
To check it worked: Ask Grok to list your Spaces accounts.
You sign in on Spaces' own page during this step, so Grok 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, xAI's help pages have their current steps, and our Grok setup page has ours.
Step 3: try it
Open a new chat in Grok, make sure Spaces is turned on, and ask in plain words:
- Show me my Messenger conversations from today that have no reply.
- Which of these ask about a date? List the dates.
- Draft replies to the price questions using my notes, and show me before sending.
- Who asked about delivery outside our area this week?
Start with a question that only reads, like the first one. It shows you that Grok 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
Grok 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 Grok 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 Grok writes the real answers in your next session.
Paste your notes, including the list of booked dates, at the start of each Grok chat. Grok can only check a date against the list you give it.
What Spaces does on Messenger
Spaces works with the Messenger conversations on your own Facebook account: listing them, reading them, and replying in the conversation. Page comments are not something Spaces offers on Messenger, so keep public replies on Facebook for yourself.
Facebook watches personal accounts closely, so Spaces keeps Messenger lower than its other channels: up to 50 messages a day and 8 new conversations a day once the account has settled in. Replies to people who message you are what Messenger is for, and they are where Grok does nearly all its work.
A worked example: a party hire Saturday
Here is how a session might go for a small bouncy castle and party hire business, on a Monday morning after a busy weekend of local group posts. Names and details are examples.
| Who | Message |
|---|---|
| You, to Grok | Show me my Messenger conversations from the weekend that have no reply. |
| Grok | Five. Hannah asks if you are free on Saturday the 14th for a castle and a slide in Didsbury. Mo asks the price of the princess castle. Claire asks if you set up indoors in a church hall. Dean asks if you deliver to Wilmslow. Sophie asks if you can do the 21st. |
| You | Here are my notes and booked dates. Draft all five. |
| Grok | Hannah: "Hi Hannah, yes, the 14th is free. A castle and slide together is £140 with set-up in Didsbury. Shall I hold the date? We take a £30 deposit." Mo: "Hi Mo, the princess castle is £85 for the day, delivered and set up." Claire: "Hi Claire, yes, we can set up indoors if the ceiling is at least 4 metres high." Dean: "Hi Dean, Wilmslow is just outside our usual area, so there is a £15 delivery charge." Sophie: "Hi Sophie, sorry, the 21st is already booked. Would the 20th or 28th work?" |
| You | Change Hannah's to say I will confirm the hold once the deposit is in. Then send all five. |
| Grok | Done. All five replies are going out at least 20 seconds apart, so the last one leaves a couple of minutes after the first. |
Grok could only say the 14th was free and the 21st was booked because the owner pasted the list. Spaces gives Grok your messages, not your diary, so the list is what keeps the answers true.
A booked-dates list Grok can check
The single most useful thing you can give Grok for a booking business is a short, current list of dates. Keep it at the bottom of your notes and update it whenever you take a deposit:
About us: Bounce About Party Hire, south Manchester.
Area: within 8 miles of Didsbury. Outside that, £15 delivery.
Prices: princess castle £85, standard castle £75, castle and slide £140. All delivered and set up.
Deposit: £30 to hold a date. Only I confirm a hold once the deposit is in.
Indoors: yes, if the ceiling is at least 4 metres.
Never: promise a set-up time, agree a discount, or answer a complaint. Tell me instead.
Booked dates this month: 7th, 8th, 21st, 22nd.If a date is not on the list, Grok should say it is free and that you will confirm. If the list is out of date, the answers will be too, so make updating it part of taking a deposit.
Before and after: replies that close the booking
| Customer asked | Rushed reply | Reply from your notes |
|---|---|---|
| Free on the 14th? | Yes | Yes, the 14th is free. Would you like me to hold it? We take a £30 deposit, and I confirm once it is in. |
| How much for the castle? | £85 | The princess castle is £85 for the day, delivered and set up. Which date are you thinking of? |
| Do you do Wilmslow? | Bit far | Yes, Wilmslow is just outside our usual area, so there is a £15 delivery charge on top. |
A simple rhythm for Messenger
Grok acts when you ask it in a chat, so set yourself a rhythm. Most booking enquiries are not urgent to the minute, but a reply the same morning often wins the date.
| When | What to ask Grok |
|---|---|
| First thing | What came in overnight? Draft everything from my notes. |
| Lunchtime | Anything new since this morning? Who is waiting on a deposit? |
| End of the day | Anyone still without a reply? Draft those too. |
In between, a Spaces routine can send a set reply to a new message, such as "Thanks for your message! We reply within a few hours." It is not an AI, and it buys you time until your next Grok session.
Why Messenger needs a lighter touch
- Like Instagram, Messenger limits messages to people who have not replied, so replies in existing chats work best.
- New conversations are rare by design: 2 a day at first, rising to 8 a day once the account has settled in.
- Do not message everyone who commented on a group post. Wait for them to message you.
- Keep replies short and personal. Long, identical messages look like a bot.
What if...
- A customer comes back after a few days? Replies in an existing conversation are what Messenger expects. Our guide to the Messenger 24-hour window explains the timing rules that apply to businesses.
- Two people ask for the same date? Grok works from the list you paste. Confirm the first deposit yourself, update the list, then ask Grok to reply to the second.
- Someone complains about a past party? Ask Grok to leave it for you, and reply personally.
- You want to stop all sending for a while? Pause all sending in Spaces under Settings, then Pause everything. Reading keeps working.
Common mistakes to avoid
- Forgetting to update the booked dates, so Grok offers a day you have filled.
- Letting Grok confirm a booking. Only you confirm, once the deposit is in.
- Messaging people who commented on a group post but never wrote to you.
- Pasting long price lists into replies. Answer what they asked and offer the next step.
- Expecting Grok to answer at night. It only acts in your sessions.
Summing up
With Spaces, Grok can read your Messenger conversations, check dates against your list and send replies in your voice. Keep a short, current list of booked dates, let only yourself confirm bookings, keep to people who wrote to you, and let Spaces keep the account at Messenger's gentle pace.
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 50 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 |
|---|---|---|
| First 3 days | 1 | 2 |
| Rest of week 1 | 1 | 3 |
| Week 2 | 2 | 5 |
| Weeks 3 and 4 | 2 | 6 |
| 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 Grok see my booking diary?
No. Spaces does not connect to booking systems. Paste a short list of booked dates into your notes, and Grok checks requests against that.
Will Grok answer Messenger while I am at a party set-up?
No. Grok acts when you ask it in a chat. A Spaces routine can send a set holding reply in between, and Grok writes the real answers in your next session.
Why does Spaces send so few new Messenger chats?
Facebook watches personal accounts closely, so Spaces keeps new conversations to 8 a day at most once the account has settled in. Replies to people who wrote to you are where Messenger works best.
Which Grok plans can add the Spaces connector?
Grok's connectors are added at grok.com/connectors. On Business and Enterprise plans an admin adds the connector first. xAI decides which plans can do this, so check their help pages if you cannot find it.
Can Grok reply to comments on my Facebook posts?
No. Page comments are not available through Spaces. Reply to comments yourself, and use Grok for the Messenger conversations that follow.
Does Grok see my Facebook password?
No. You sign in to Facebook on Spaces' secure link, and Grok signs in to Spaces. Your Facebook login never goes into Grok.