How to integrate with Meta Muse
Usually "integrate" means someone hands you API docs. Not this time.
When Meta launched Muse on 8 September, Shopify products were live inside it the same day. Checkout runs through Shop Pay. Meta wired Stripe Link and PayPal into the payment flow too. Merchants did nothing, because there was nothing to do.
So if you've been hunting for a Muse signup page, you've been hunting for something that doesn't exist for most shops. Find yourself below instead.
On Shopify
Your integration happened without you. That's convenient and it's also the problem, because an integration you didn't do is one you never tested.
Three things to check, and the middle one catches most people.
Is everything actually in the catalog? Muse sees what Shopify's catalog holds, so anything excluded from that sync is simply invisible. The worse case is a product that's visible but wrong: stale stock, old price. A robot recommending something you can't ship turns into a refund and a one-star review rather than a sale.
Are the product details filled in? Being in the catalog gets you found. Having the fields populated gets you matched, and those aren't the same thing. Size, colour, material, dimensions, whatever your category filters on. A person scans a grid of photos and picks one they like the look of. A robot filters on fields, and an empty field matches nothing at all. This is where most shops quietly lose, because the catalog looks fine from the outside.
Do price and stock agree with your actual site? Any gap between the two surfaces at the worst possible moment.
Since most people reading this are on Shopify: we put these checks into a free app, Mimetic Conversion & AEO Agent. It scans your live store, flags which products are missing the fields a robot filters on, and where a fix is safe it'll apply it to your theme with a rollback. AEO means answer engine optimisation, which is a clumsy phrase for the thing this whole page is about.
Not on Shopify
No API to plug into yet, so the work is making your site legible on its own. Three fixes.
Product details in machine-readable form. The format's called JSON-LD, and it's a small block of plain data on the page saying what the product is, what it costs, whether it's in stock. 48% of the sites we scan have it broken or missing.
A tag saying who your company is. Same idea a level up: name, logo, contact. Also missing on 48%.
Shipping, returns and stock as readable text. Half the shops we scan hide shipping cost until checkout, which is often the exact number a robot needs to rank you.
None of this is Muse-specific, which is the best reason to do it. The same data feeds Google, your own site search, and whatever assistant shows up next. You'll find the identical list in how to integrate with Instinct.
The agentic commerce alphabet soup
There are four acronyms flying around and they solve different problems. MPP handles machine-to-machine payments, ACP handles AI checkout, Google's AP2 handles permissions, x402 does payments over the web. Most merchants need none of them yet. Here's the one people ask about.
MPP, and whether it's yours
This is the bit most articles get wrong, so it's worth slowing down.
MPP is the Machine Payments Protocol. Stripe and Tempo put it out on 18 March 2026, and it lets a robot pay for something itself, with no human typing a card number. It runs on an allowance: the robot gets a spending limit up front, then draws against it in small amounts as it works, settling in normal currency or stablecoins.
It was built for what robots buy on their own account. An API call. An hour of compute. Access to a dataset. Small repeating charges.
It is not how a person buys a jacket through Muse. That's Shop Pay, and it already works.
One question sorts it:
Is the robot buying for a person, or for itself?
If it's for a person, someone wanted boots and sent their assistant, and what you need is readable data and a checkout that completes. A human approves the payment at the end. MPP never enters the picture.
If it's buying for itself, the robot needs your data or your API or your compute because it has a job to finish. Now MPP is precisely right, and worth learning early while the market's still small.
That second case catches more businesses than people expect. The question isn't "am I a tech company", it's "could a machine ever be my customer". Sell data, research, monitoring, verification, images, or any kind of programmatic access, and you've got a robot-shaped buyer who can't get through your signup form, because your form assumes a human with an inbox and a credit card.
MPP isn't the only one either. ACP handles AI checkout, Google's AP2 handles permissions, x402 does payments over the web. They solve neighbouring problems and a serious setup might use two of them. None of them makes an unreadable shop readable.
Where these numbers come from
Every percentage on this page comes from our own scanner, run against the last 220 ecommerce sites we audited before 2026-09-28. It's an automated pass over live pages: what loads, what's in the markup, what a crawler can and can't reach. Not a survey, not an estimate, and not a sample we picked to make a point. Where a check didn't apply to a site, that site isn't counted in its denominator, which is why the totals differ per row.
We'll re-run it as these assistants change. If a number here is stale by the time you read it, tell us and we'll fix it.
Order of work
- Check the catalog is complete and the fields are filled in
- Fix the company tag and the product data
- Put shipping, returns and stock in plain text
- Try buying from yourself without being clever about it
- Make sure you'd notice if a robot visited (46% of shops we scan have broken analytics, so this isn't rhetorical)
- Only then, and only if machines could be your customers, look at MPP
Six matters far less than two for almost everyone reading this. Over half the sites we scan fail at least one machine-readability check. That's the expensive problem and the cheap fix, which is an unusual and good combination.
Not sure which section you're in? That's a short conversation rather than a project. Book 30 minutes and we'll look at your setup together, work out which of the six steps you actually need, and skip the rest. On Shopify, the free app will answer steps one to three before we even speak.