Can an AI agent change my AdSense ad units?

Yes, for every organization — create and update ad units, and create, update or delete custom channels, each pausing for approval. Adding a site and blocking ads are not possible for anyone: AdSense v2 makes sites and policy issues read-only.

Can an agent change my AdMob mediation waterfall?

The tools exist — create and update mediation groups, create apps and ad units, configure adapter mappings. But Google gates every one of those methods behind limited access, so a 403 asking you to contact your account manager is the expected answer unless your account is allowlisted.

Why did the changelog previously say these were read-only?

Because a platform audit concluded their APIs had no write endpoints, and that conclusion was wrong. Measured against the AdSense v2 reference, ad unit and custom channel writes were there all along. The earlier entry now carries a correction.

Can I use these today?

Yes — both write scopes are offered to every organization. AdMob additionally needs Google's own limited-access approval on top of that, which is Google's gate rather than ours.

Update

AdSense and AdMob get write tools — and a correction about why they didn't have any

TL;DR

AdSense and AdMob both have write tools now, offered to every organization. The scopes arrived on 18 September as an org-gated preview pending Google's verification and were released to everyone the same day at the owner's instruction — an existing AdSense or AdMob connection gains the write scope when it is re-authorized. This entry also corrects something this changelog got wrong two days ago: we said these platforms were read-only because their APIs have no write endpoints. They do, and they always did.

The correction first

On 16 September the Search Console entry said AdSense and AdMob "are read-only because their APIs have no write endpoints — that is the shape of the product". That was a platform audit's conclusion and the audit was wrong. Measured against the AdSense v2 reference rather than inferred, the API has create and patch for ad units and create, patch and delete for custom channels. AdMob v1beta has app, ad unit and mediation-group creation.

A false statement about a third party's API is worth correcting explicitly rather than quietly, because people plan around it. The earlier entry now carries a correction note pointing here.

AdSense — what the API actually has

create_ad_unit and update_ad_unit — new placements and changes to existing ones.
create_custom_channel, update_custom_channel, delete_custom_channel — the grouping you report against.
Twelve reads alongside them, including sites, policy issues, URL channels, payments, alerts and the ad code itself.

What is NOT there, checked rather than assumed: adding a site and blocking ads. In AdSense v2 sites and policyIssues are read-only, so an agent can tell you a site has a policy problem and cannot act on it. That limit is Google's, and stating it is more useful than discovering it mid-task.

AdMob — available, with a gate that is not ours

create_app, create_ad_unit — the inventory itself.
create_mediation_group and update_mediation_group — waterfall lines, CPM and targeting.
create_ad_unit_mapping for third-party adapter configuration.
Eleven reads, including the mediation report that ranks ad sources by observed eCPM and fill rate.

★ Google gates EVERY one of these AdMob methods behind "limited access" — a 403 telling you to contact your account manager. The tools report that as what it is rather than as a permission bug on our side, but plan for it: the write path exists and your account may not be allowed to use it.

Why this matters more for publishers than it looks

Publisher work has been analysis-only here: the agent could rank ad sources by observed eCPM, name the waterfall change worth making, and then hand it to you to apply by hand in the AdMob console. Closing that loop is the difference between a recommendation and a change.

The AdSense half is narrower but hits a real chore — custom channels are how reporting gets segmented, and creating them one at a time in the interface is exactly the kind of work nobody schedules.

Frequently asked questions

Can an AI agent change my AdSense ad units?: Yes, for every organization — create and update ad units, and create, update or delete custom channels, each pausing for approval. Adding a site and blocking ads are not possible for anyone: AdSense v2 makes sites and policy issues read-only.
Can an agent change my AdMob mediation waterfall?: The tools exist — create and update mediation groups, create apps and ad units, configure adapter mappings. But Google gates every one of those methods behind limited access, so a 403 asking you to contact your account manager is the expected answer unless your account is allowlisted.
Why did the changelog previously say these were read-only?: Because a platform audit concluded their APIs had no write endpoints, and that conclusion was wrong. Measured against the AdSense v2 reference, ad unit and custom channel writes were there all along. The earlier entry now carries a correction.
Can I use these today?: Yes — both write scopes are offered to every organization. AdMob additionally needs Google's own limited-access approval on top of that, which is Google's gate rather than ours.