Stop answering the same Marketplace questions.
MPMate automatically replies to simple Facebook Marketplace messages using answers you wrote yourself, while leaving anything important for you.
Set it up in 3 minutes. Let it handle the repetitive stuff.
- “Is this still available?”
- “Where are you located?”
- “Would you take $30?”
14-day free trial · No credit card · First 10 users pay $5/month
Automatically replies
Let MPMate handle the easy questions.
MPMate answers the repetitive questions you get every day, and stays out of conversations that need a real person.
The difference
Your words. Not AI-generated replies.
You write your answers once. MPMate simply knows when to use them.
No AI making things up. No guessing. No weird replies that don’t sound like you.
Who it’s for
Built for sellers tired of typing the same thing.
You sell occasionally
MPMate handles the easy questions while you are busy.
You sell regularly
It saves hours of repetitive replies every week.
You sell a lot
It keeps conversations moving while you focus on real buyers.
Getting started
Up and running in about 3 minutes.
No coding. No terminal. No complicated setup.
1
Activate MPMate
Paste the code you receive by email.
2
Sign into Facebook
A normal Facebook window opens. Your password goes directly to Facebook.
3
Pick your listings
MPMate reads your Selling inbox and lists what people have messaged you about. Confirm what’s still for sale, add your answers, and turn it on.
Security & privacy
Your Facebook account stays yours.
MPMate runs directly on your Mac instead of sending your Marketplace conversations to a cloud server.
We never see your Facebook password
You sign in directly through Facebook.
Your messages stay on your Mac
Your Marketplace conversations aren’t uploaded to our servers.
No AI-generated replies
MPMate only sends answers you’ve written yourself.
Not sure? It stays quiet.
If MPMate doesn’t have a confident answer, it leaves the conversation to you.
The app isn’t signed with an Apple developer certificate, so macOS asks you to approve it the first time you open it. Here’s exactly what you’ll see.
How it compares
Facebook already has auto-replies. So why MPMate?
Facebook’s built-in AI can answer questions based on what’s already in your listing. MPMate is different: you decide exactly what it can say.
| Feature | Facebook AI | MPMate |
|---|---|---|
| Uses your exact wording | No | ✓ |
| Answers you wouldn’t put in a public listing | No | ✓ |
| Writes the text with AI | Yes | No |
| Can answer beyond the listing | Limited | ✓ |
| Leaves uncertain questions for you | Unclear | ✓ |
To be fair: Meta’s version is free, built in and needs nothing installed, and for plenty of sellers it will be enough. Try it first. This is for the ones who keep typing what a listing can’t hold: the street address, the buzzer code, the evening that actually works. If that isn’t you, save your money.
Pricing
Try MPMate free for 14 days.
No credit card. After the trial it is $10 a month, and the first 10 people here keep it at $5.
MPMate Pro
$10/month
$10 $5/month
for the first 10 people
- Replies automatically, in your own words
- Unlimited replies you write yourself
- Covers every listing you have
- You choose how often it checks
- Answer the tricky ones inside the app
- See every reply before it sends
- Email alerts while you are out
- Runs on your Mac, not on our servers
Nothing is charged during the trial and there is no card on file. Founding members keep $5/month for as long as they stay subscribed.
FAQ
Questions
Everything people ask first.
Start here
One important thing to know
MPMate automates activity on your own Facebook account. Facebook’s terms don’t allow this type of automation, so there is a risk that Facebook could restrict an account.
MPMate is designed to be cautious: limited replies, delays between messages, and no guessing. But we can’t guarantee Facebook won’t take action. We’d rather be upfront about this before you sign up.
Mac first: macOS 11 or later, Intel or Apple Silicon. Windows is coming.
Is this safe?
Two different questions sit inside that one. Your data is safe: MPMate runs on your Mac, never sees your Facebook password, and doesn’t upload your conversations. Your account carries some risk, because Facebook’s terms don’t allow this kind of automation. We say so plainly in One important thing to know above. MPMate is deliberately cautious about it: a small number of replies, pauses between them, and silence whenever it isn’t certain.
Does MPMate need my Facebook password?
No. You sign in yourself in a normal Facebook window, including two-factor. The app never sees, stores or transmits your password.
Does MPMate use AI?
No. It matches the question against answers you typed yourself and sends one of them, word for word. Nothing is generated, paraphrased or invented, which is the main way it differs from Facebook’s own auto-replies.
What happens if it doesn’t know the answer?
It stays quiet and tells you. Price, condition, delivery, timing, anything with an extra question attached: all of that comes to you. You can answer inside the app or in Messenger as usual.
Does my Mac need to be on?
Yes. It runs on your computer rather than in the cloud, which is what keeps your messages private. If your Mac sleeps it picks up where it left off when you’re back.
Will it reply to my personal Facebook messages?
No. It only looks at conversations attached to a Marketplace listing, and skips everything else before even reading it.
Can I cancel?
Any time, and access runs to the end of the period you’ve paid for. Nothing renews after that.
How it compares
Isn’t this just Facebook’s own auto-replies?
Facebook added Meta AI auto-replies in March 2026, and they cover the same easy questions using what’s in your listing. So if your listings already hold every answer a buyer needs, start there, it’s free. The difference is where the answer comes from. Meta AI works from listing fields and writes the wording itself. This sends the exact sentences you typed, including things you’d never put in a public listing: your street address, the buzzer number, which evenings suit you. You also write them once for every listing, rather than setting them up on each listing as you create it.
Will buyers realise it’s automated?
Most won’t. The replies are short, in your voice, and arrive quickly, which is how an attentive seller sounds anyway. We won’t pretend it’s undetectable though: if someone asks something odd and gets a straightforward answer about availability, they may guess.
Why not just reply faster myself?
If you can, do. This is for people getting the same three questions ten times a day, or losing sales while they’re at work.
How it behaves
Does it find my listings automatically?
Mostly. Press Find my items and MPMate reads your Selling inbox and adds the listings buyers have messaged you about. Two limits worth knowing: it only sees listings with at least one conversation, and it looks at your recent conversations rather than your whole history, so a brand new listing shows up the next time you scan. You confirm an item is still for sale, because the inbox cannot tell it that.
What if I reply myself at the same time?
It steps back. If you’ve spoken last in a conversation it leaves it alone — it will never talk over you or answer something you’ve already handled.
Will it reply in the middle of the night?
It replies whenever it’s running, so yes: if your Mac is awake at 3am, a reply can go out at 3am. There are no quiet hours yet. For now, turning it off overnight is the answer, and quiet hours are near the top of the list to add.
What about items I’ve already sold?
Once you mark a listing sold on Facebook, buyers stop messaging about it, so the question rarely comes up. If the listing is still live, MPMate will carry on answering about it, which is why you can mark an item sold or on hold inside the app. Do that and it stops replying about that item straight away while carrying on with the rest.
Can I stop it for one particular item?
Yes. Mark that item as “on hold” and it won’t answer about it, while carrying on with everything else.
Practical
What happens if Facebook changes?
Facebook redesigns things regularly, and when they do we publish a fix that your app picks up on its next check. No reinstall, nothing for you to do. It’s the main thing your subscription pays for.
Does MPMate check my subscription online?
No. Your key is checked on your own Mac, so MPMate keeps working if your internet drops or if our servers are down. Nothing about your account or your conversations is sent anywhere to unlock the app.
How do I install it? macOS says it can’t verify the app
The app isn’t signed with an Apple developer certificate, so macOS blocks it the first time and shows this. Four steps, once, and you’ll never see it again.
“MPMate” Not Opened
Apple could not verify “MPMate” is free of malware that may harm your Mac or compromise your privacy.
The wording shifts a little between macOS versions.
1
Drag it to Applications
Open the disk image you downloaded and drag MPMate into your Applications folder, the way you would any other app.
2
Double-click it once, then click Done
macOS won’t open it yet. You’ll get the message above. Click Done. Don’t click Move to Trash.
3
Approve it in System Settings
Go to System Settings › Privacy & Security, scroll to the bottom, and click Open Anyway next to the app’s name. Do this within an hour of step 2, or macOS forgets and you’ll need to repeat it.
4
Enter your Mac password, and open it again
Click Open Anyway once more if you’re asked. That’s the last you’ll see of it. From now on it opens like anything else.
Why does macOS show this warning? MPMate is distributed directly rather than through the Mac App Store, and has not been notarised by Apple yet. That is why macOS asks you to approve it by hand the first time you open it.
Can I use it on two computers?
Yes, one subscription covers your own machines. It’s per person, not per computer — just don’t share your code around.
What happens when my trial ends?
It stops replying and tells you. Nothing is charged unless you choose to subscribe. There’s no card on file during the trial.
Is my payment handled securely?
Payments go through an established payment provider. We never see or store your card details.
Be one of the first 10.
Get MPMate Pro for $5/month instead of $10/month, locked in for as long as you stay subscribed.
We’ll email you when MPMate is ready, plus occasional updates while we build.