Google AdX access comes through one of two routes: a direct Ad Manager 360 relationship with Google, which is offered mainly to large publishers, or an invitation from a Google partner through Multiple Customer Management (MCM). There is no public sign-up form like the one AdSense has. For most small and mid-sized sites, an MCM partner is the realistic way in.
Here's the catch. Most publishers put all their energy into getting accepted, then sign whatever terms arrive with the invitation. The revenue share, payment schedule and exit terms are what you live with every month, long after the excitement of getting Google AdX access has worn off. This guide covers both halves: how the routes work, what a partner checks, how the invitation runs and what to agree before you accept. If you'd like a hand, see our AdX invitation guidance.
AdX vs AdSense: what Google Ad Exchange is
Google Ad Exchange (AdX) is the programmatic marketplace that sits inside Google Ad Manager, Google's ad server, while AdSense is a self-serve network that fills your ad slots for you. You don't install AdX on its own; you reach it through Ad Manager.
That's the wrong idea we hear most. People picture AdX as a better AdSense code they can swap in. It isn't. With AdX connected to Ad Manager, you can:
- Let AdX demand compete with other sources, such as header bidding partners and direct deals.
- Set pricing rules, block ad categories and manage ad units in far more detail.
- Run setups AdSense doesn't offer, such as more advanced video and app configurations.
For every difference in one table, plus the net revenue sum to run before you switch, see our side-by-side comparison of AdSense and AdX.
More control means more work. Say you run a recipe site on AdSense Auto ads and never touch the settings. With AdX through a partner, someone has to define ad units, price floors (which trade eCPM against fill rate) and blocking rules. If that's the partner, you're trusting their setup. If it's you, you need the time to learn Ad Manager.
Our honest view: AdX suits sites with steady, quality traffic and someone ready to look after the inventory. It won't rescue thin traffic. If you're still choosing between ads, affiliate links and other revenue models, start with our guide on how to monetize a website.
How AdX sells your ad space: auctions and deals
AdX sells each ad impression in real time, through an open auction or a deal with a chosen buyer. When a page loads, Ad Manager asks AdX and your other demand for bids, and the highest eligible price wins the slot. It all happens before the ad shows.
Google AdX access gives you four ways to sell. Google's Ad Manager help groups Private Auctions and Preferred Deals as Private Marketplace deals:
| Channel | How it works | Guaranteed? |
|---|---|---|
| Open Auction | Any eligible buyer bids, and the best bid wins | No |
| Private Auction | You invite chosen buyers and set a floor price | No |
| Preferred Deal | One buyer gets first look at a fixed CPM you agree | No |
| Programmatic Guaranteed | A buyer commits to a set volume at a fixed price | Yes |
Most new AdX publishers start with the open auction alone. Deals come later, once buyers know your audience. Google's page on Preferred Deals explains the order: a Preferred Deal usually outranks Private and Open Auctions, and if the buyer passes, the impression falls back to them.
The two routes to Google AdX access
There are two real routes to Google AdX access: a direct relationship with Google, which is mostly for large publishers, or an invitation through an MCM partner, which is how most sites get in.
1. A direct account with Google
Google offers direct Ad Manager 360 and AdX relationships mainly to large publishers, through its sales team. There's no public application form for a direct AdX account. Skip this route unless Google's sales team is already talking to you. Chasing it costs weeks and rarely goes anywhere for a smaller site.
2. Through an MCM partner (Google MCM)
For most small and mid-sized publishers, the route is a Google partner using Multiple Customer Management, or MCM. Google MCM lets an approved partner (the "parent") work with publishers (the "children") inside Ad Manager. The partner invites you, you accept, and your inventory can then be sold through AdX under that relationship.
Accepting doesn't hand over your website. What you give the partner depends on which of the two delegation types they use:
| Delegation | In practice |
|---|---|
| Manage inventory | The partner manages and serves your inventory from its own Ad Manager network. You place the tags or code the partner gives you. |
| Manage account | You have your own Ad Manager network and give the partner access to manage it for you. |
Under MCM, the partner sets the revenue share it keeps when it sends the invitation. In Google's own example, a parent that keeps 20% leaves 80% for the child publisher. So the partner's payment terms matter as much as its technology.
Direct account vs MCM partner compared
The direct route gives you the most control, and a partner gives you the most help. Here's how the two compare:
| Direct with Google | Through an MCM partner | |
|---|---|---|
| Who it's for | Large publishers Google's sales team approaches | Small and mid-sized sites with steady traffic |
| How you get in | Google's sales team, no public form | Apply to a partner, then accept Google's invitation |
| Revenue share | No partner cut | The partner keeps an agreed share |
| Setup and ad ops | Your team does everything | The partner sets up and manages most of it |
| Control | Full control of the network | Shared, depending on the delegation type |
| Main risk | Staff time and mistakes in a complex tool | Poor payment or exit terms |
Where to find a partner
Google's Certified Publishing Partners directory lists companies Google has trained on Ad Manager, AdSense and AdMob. You can filter it by country and service. Not every MCM partner is listed there, so use the checks below on any company you consider.
Partners charge in different ways. Most take a revenue share, and some charge a flat fee or tie their cut to performance. Ask which model applies before you compare offers, because a lower headline split with extra fees can cost more.
How to check a partner before you apply
Check that a partner is real before you share anything. These quick checks catch most fake "AdX resellers":
- The invitation comes from Google. A real MCM invite is sent by Google's Ad Manager system to your email. A partner that asks you to log in through its own page, or for your Google password, isn't running MCM.
- Their ads.txt line uses Google's format. Ask for the exact line they'll give you. It should start with
google.comand end with Google's ID,f08c47fec0942fa0. - They ask about your site before they talk money. A partner that promises approval or a set income before reviewing your traffic is selling, not reviewing.
- The contract names the delegation type. Manage inventory or Manage account should be written down, not left vague.
What partners check before inviting you
Partners check six areas before they invite you: ownership, content, traffic quality, essential pages, consent and ad setup. Each partner sets its own bar, and Google still reviews every child site on top of that.
Is there a minimum traffic requirement for AdX?
Google doesn't publish a minimum traffic number for AdX. You'll see figures like 5 million monthly pageviews quoted for direct accounts, but those come from partner blogs, not from Google. Each MCM partner sets its own threshold, often as a daily revenue or traffic level, so ask them.
Google does publish a few hard rules. Google's Ad Manager sign-up page lists three things you need for an account: a Google Account, your own content created from scratch, and an invitation from an existing Ad Manager publisher. Your site's main language must also be on Google's supported languages list.
When we review a site for an MCM application, this is the order we work through:
- Ownership. The domain, the Google account email and the business name all match. A mismatch is one of the easiest delays to avoid.
- Content. Original, useful pages with a clear purpose, and nothing that breaks Google's publisher policies.
- Traffic quality. Steady visitors from sources you can explain. In Google Analytics, open Reports > Acquisition > Traffic acquisition. If a big share comes from a referrer you don't recognise, sort that out first. Bought, incentivized or bot-like traffic is a common reason for rejection, and our compliance and IVT guide covers what to avoid.
- Essential pages. A privacy policy, terms, a contact page and an about page that says who runs the site.
- Consent. A consent setup that fits where your visitors are. For visitors in the EEA, the UK and Switzerland, Google requires a Google-certified consent management platform.
- Ad setup. A clean ads.txt file, sensible ad placements, and no leftover code from networks you've dropped. Open yourdomain.com/ads.txt in a browser. It should load as plain text, not a 404 page or your homepage.
We've turned these into a full pre-application checklist you can work through in an afternoon.
How the MCM invitation works, step by step
The MCM invitation runs in six steps, from your application to the partner through to live ads, and Google reviews your site along the way.
- You apply to a partner. You share your site, traffic levels, main audience countries and current monetization. A good partner never asks for your passwords.
- The partner reviews your site. They check the areas above and ask you to fix anything that would fail Google's review.
- You receive an invitation from Google. The email comes from Google on behalf of the partner. Accept it from the same email address you gave the partner. An MCM invitation is valid for 90 days, so don't leave it sitting.
- You complete your details. Google asks for your billing country, customer details, time zone, payment currency and a phone number to verify. Enter details exactly as they appear elsewhere. Mismatched details cause delays. If you already have an Ad Manager network, the partner needs its network code, found under Admin > Global settings > Network settings.
- You update ads.txt. The partner gives you the exact lines to add. Paste them as provided.
- Setup and ad serving. With Manage Inventory, the partner sends you tags. With Manage Account, they configure your own Ad Manager network. Ads serve once Google approves the site and the setup is live.
A Google line in ads.txt has four fields: the domain, a publisher ID, the relationship and Google's certification ID. It looks like this (the ID below is a placeholder, so use the one your partner sends):
google.com, pub-0000000000000000, RESELLER, f08c47fec0942fa0Copy the relationship field too. Whether it says DIRECT or RESELLER comes from your partner's setup, so don't change it.
Timing: Google says MCM child approval usually takes a few days, but in some cases it can take 2-4 weeks. The rest depends on how fast you and the partner complete each step. Be wary of anyone who promises approval by a set date.
Questions to settle before you accept
Get revenue share, payments, reporting, access and exit terms in writing before you accept an MCM invitation. It's a business agreement, and these five points decide what you take home.
- Revenue share. What percentage the partner keeps, and whether it changes over time or with volume.
- Payments. The payment schedule, minimum threshold, currency and payment methods.
- Reporting. Which reports you'll see, how often, and whether they come straight from Ad Manager data.
- Access. Who controls which accounts, and what happens to your Ad Manager network if you leave.
- Exit terms. The notice period, when the final payment arrives and how the delegation is ended.
Most people get this part wrong. They compare the revenue share and stop there. Say one partner offers a slightly better split but pays late and sends a monthly PDF instead of report access. The better split can be worth less in practice. Read the exit terms just as closely, because they decide how cleanly you can leave.
Our partner onboarding page goes through these points in more detail.
Common reasons applications stall
Applications stall for fixable reasons, not because a site is too small. These come up most:
- Thin or copied content, or a site that's mostly ads with little substance.
- Traffic that's too new, too irregular, or looks paid or incentivized.
- Missing privacy, contact or about pages.
- Details that don't match between the application, the domain and the Google account.
- An ads.txt file that's missing, in the wrong folder, or still lists old partners.
- Past policy issues on related Google accounts.
Fix these before you apply. It's far easier than explaining them to a reviewer afterwards.
Frequently asked questions
Can I apply for an AdX account directly?
Not through a public form. Google offers direct relationships mainly to large publishers through its sales team. For most sites, Google AdX access comes through an MCM partner.
Is AdX better than AdSense?
It can earn more, because more buyers compete and you get more control, but it also takes more setup and management. AdX suits sites with steady, quality traffic that are ready to run Google Ad Manager properly.
What's the difference between AdX and Google Ad Manager?
Google Ad Manager is the ad server that decides which ad fills each slot. AdX is one source of demand inside it, alongside AdSense, header bidding partners and direct deals. You manage AdX through Ad Manager, not as a separate tool.
How much can I earn with AdX?
No one can tell you in advance. Earnings depend on your traffic countries, niche, ad layout, viewability and the partner's share. Treat any income figure a partner quotes before reviewing your site as a sales pitch.
Do I need my own Google Ad Manager account?
It depends on the delegation type. With Manage Inventory, the partner serves your inventory from its network. With Manage Account, you need your own Ad Manager network. See Google's MCM help page for the official details.
Does it cost anything to get AdX through a partner?
Google doesn't charge you to join. MCM partners are paid through a revenue share on what your ads earn, and the split varies by partner, so get it in writing before you sign.
Can I keep AdSense while I apply?
Yes. Applying to a partner doesn't change your AdSense account, so keep it running while you wait. Once AdX is live, agree with the partner how the two share your pages so you don't load two sets of ad code in the same slot.
Next steps
The short version: get your site review-ready, pick a partner whose terms you've read, and treat the invitation as a contract, not a prize. Our AdX invitation guidance explains how to request Google AdX access with MH AdX and how we work with publishers. Our readiness review finds gaps before a partner or Google does. Nothing here guarantees approval, because Google and each partner make their own decisions.
