Marie Haynes, the Ontario-based search consultant, told readers of her newsletter on October 29, 2026, that she was "pretty sure" Google's Connected Apps Platform "will be one of the most important things we will work on over the next few years," arguing that the larger opportunity in AI search lies in people using a business's services inside Google rather than in brand mentions on ChatGPT. The same issue carried a comment from Google's John Mueller, who described connected apps as "a search platform" and added that the view was a personal one, from someone who does not work on the product. Google's own documentation, much of it updated around the October 28 preview launch, describes a narrower reality for now: in Search, connected apps run only in AI Mode, in the United States and in English, with five apps listed, and users may still be sent to the partner's own app to finish a task.

In Short

A well-known search consultant told her readers that Google's new system for putting outside companies' apps inside Search and Gemini matters more than trying to get mentioned by chatbots, and a Google search employee called it exciting too. That matters to businesses deciding where to put their search effort, because building a connected app means running software that Google reviews, which is a different job from writing web pages. For now the Search side works only in AI Mode in the US and in English, lists five apps, and Google has not published how it chooses which app handles a request or whether it will charge developers.

What Haynes wrote

The newsletter went out on October 29 under the subject line "Google announced the Connected Apps Platform - This is the start of the Agentic Web with so much opportunity!" Its top story, headlined "Google's Connected Apps Platform - This is how agentic search will unfold!", came a day after Google opened a preview of the platform on October 28.

Her summary matched Google's own description. Developers connect either a cloud-hosted MCP server, built on the open protocol that lets AI models call outside tools, or an Android integration. "Google just announced the Connected Apps Platform - a way to give developers a single place to build and manage apps for Search and the Gemini app," she wrote. "The apps will integrate with a cloud hosted MCP server or Android MCP." Her emphasis fell on two words. "Did you catch that? 'for Search'," she wrote. "Google is inviting us to create apps that people can surface and use from within Gemini or directly from Search."

From there the argument widened. "The new Connected Apps Platform will let users do things with your business without ever leaving Search," according to the newsletter. Haynes tied the launch to her own recent position on GEO, the practice of shaping content so that generative AI systems cite or name a brand. "Remember how I said 'GEO is a distraction?' While many SEOs are focusing on ChatGPT mentions, the real opportunity in AI Search is going to be with people engaging with your business right from Google's Search results," she wrote.

She also connected it to Google's chief executive. "Remember when Sundar Pichai said that Search will become an agent manager? This is it!" The reference points to Pichai's April appearance on the Cheeky Pint podcast, where Pichai described Search becoming an agent manager within a decade.

The issue told readers what to do next. "Start thinking about what your business offers that people will want to use with their agents. Then practice building it!" Haynes wrote, and closed the newsletter with a brainstorming prompt that points an AI model at Google's developer page and launch post. "If you have never vibe coded before, I urge you to play around with it," she added, using the term for vibe coding, in which a person builds software through AI-generated code without reviewing it line by line. "Your goal should be to create things you use."

A further item pushed the idea toward hardware. Writing about the XREAL AURA, which she described as the first wired XR glasses powered by Android XR, Haynes returned to the platform: "Remember we were talking about connected apps that can be used from Search? Imagine the possibilities for people who are using Search with XR glasses!" Nothing in Google's Connected Apps documentation mentions glasses or XR devices.

The commercial frame

The newsletter is also a sales channel. It promotes Search Bar Pro, Haynes' paid community, which had a call set for 11 a.m. Eastern on October 29, "brainstorming on what we can build for Google's Connected Apps Platform, how A2UI works and much more." Members receive $100 off her $500 diagnostic reports, according to the newsletter.

Haynes is open about her leanings. In a separate item on Gemini 4 Carbon, Google's newest model, she predicted that Google's models would become "by far the better choice" and then asked: "But perhaps I'm too bullish on Google? We will see." On Google's Agent Compute Engine, she acknowledged that some had ridiculed the announcement, saying Google was far behind Grokbot, OpenAI's Dots or Meta's Muse. "I think Google is building this slowly and responsibly," she wrote.

The views are consistent with what she has said for some time. In a December 2025 interview, Haynes argued that Google is turning from a search engine that ranks links into an agent that acts for users. On October 23, PPC Land reported on her system of about 600 OKF files feeding paid SEO reports on Gemini 4 Argon, with all figures her own.

Mueller's comment: "just my POV"

The issue's most direct link to Google came from someone else. Under the line "Here's John Mueller's comment on my post about this," she reproduced Mueller's reply to her LinkedIn post on the launch. Mueller, a Senior Search Analyst and Search Relations team lead at Google, wrote:

"I'm super excited about connected apps as a search platform. It's still extremely early, so I'm curious how it all works out, but the mix of standardized interface / MCP + Search opens up a lot of possibilities. (I don't work on connected apps, so this is just my POV)"

The disclaimer matters. Mueller's role is to explain Google Search to site owners, not to build the platform, and the comment is not a Google statement. The "standardized interface" in the comment refers to MCP, the protocol through which an AI model calls a company's tools.

Mueller has commented on both strands of Haynes' argument before. On August 14, 2025, the Google analyst warned that a strong push for new acronyms such as GEO, AIO and AEO was a sign of spam and scams. In a Search News video on November 17, 2025, Mueller said AI Mode, Google's conversational search mode, was experimenting with agentic features that let users get things done directly in Search, giving the example of reserving a restaurant table.

Haynes' LinkedIn post itself quoted Google's launch blog, with one phrase highlighted: "To help users get more done, today we're launching the preview of our Connected Apps Platform, a unified way for more app developers to bring their capabilities directly into Gemini and Search."

The GEO argument behind it

The "GEO is a distraction" line refers to a post Haynes published on her site on October 21. According to that post, she analyzed 12 months of Google Analytics 4 data from 100 websites, covering more than 145 million sessions. Sessions from ChatGPT came to 0.62% of the volume from Google organic search. ChatGPT visitors converted at 13.8%, against 3.02% for Google, but Google still accounted for 96.5% of conversions across the channels she examined.

The sample has limits that she acknowledges. Only 55 of the 100 sites tracked conversions, and she describes the conversion data as a small dataset. The post argues that businesses should concentrate on Google Search, its AI surfaces and Google's agentic commerce tools, naming Universal Cart and WebMCP among them. It does not mention connected apps; that link was made in the October 29 newsletter.

What Google's documentation says

Haynes' enthusiasm rests on what the platform could become. Google's developer documentation, help pages and policy describe what it is now. Several pages were revised around the launch: the design guidelines carry an October 28 date, and the developer prerequisites page was updated on October 30, two days after the preview opened.

Who can get in

Developers apply through an interest form for the preview, according to Google's developer overview. TechCrunch reported on October 28 that the preview was open to developers in the United States who join a waitlist, and that Google had not said when it would become more widely available. Testers of an unpublished app must use @gmail.com accounts, and only those testers can see the app before release. An account owner or administrator must accept the Connected Apps Terms of Service before an app can be registered, according to the prerequisites page.

Where the apps appear

The two surfaces are far apart in scale. According to Google's Search help page, connected apps in Search are available in AI Mode only, in the United States, in English, and only to signed-in users. The page lists five: Instacart, Canva, YouTube Music, Yahoo Fantasy Football and Sleeper Fantasy Football. Instacart, Canva and YouTube Music have been there since Google brought connected apps into AI Mode on July 16.

Gemini's availability table is much longer, at more than 60 entries. Many are Google's own services, among them Google Ads, Google Business Profile and Google Workspace, and many are notes and calendar apps from phone makers such as Samsung, OPPO and Honor. Restrictions vary by row. Instacart, Squarespace and Zillow are listed as US-only, the property site Zap Imóveis as Brazil-only, Urban Company as India-only, and most entries as English-only.

The four partners Google named at launch - Adobe, Experian, Localiza and Peloton - are live in Gemini and due to reach Search within weeks, according to the October 28 post. Developers choose the countries, regions and languages for each app themselves, but the documentation publishes no list of markets the platform supports.

How an app gets called

Users link an app once, according to the developer overview. In Gemini, an app can be invoked by typing "@" followed by its name, after which it stays in context for related prompts in that session. In Search, the help page says users name the app in a request or pick it from a list, and are offered the chance to connect it if they have not already done so. The page does not say that Search will reach for an app the user has not chosen.

Beyond explicit requests, the model decides. Google's server optimization guide says the model's planner selects the most appropriate tool from user context, and calls a tool's description the developer's main way of telling the model what it is for. No page describes a ranking among competing apps. The policy forbids attempts to influence the model into selecting one connected app over another, and the optimization guide says servers exposing dozens of tools, or deeply nested schemas that pack many functions into a single tool, will be flagged in review. That leaves the question SEOs usually ask first - how to be chosen - without a published answer.

Inside Search, or sent elsewhere

Haynes wrote that users would act "without ever leaving Search." The Search help page says otherwise for the current version: once AI Mode completes a request, users may be sent to the connected app to finish the action, with Instacart checkout, YouTube Music listening and Canva editing as examples. Google's I/O announcements on May 19 described agentic booking that routes users to partner platforms rather than completing transactions in Google's interface.

The developer rules point the other way. Google's design guidelines, dated October 28, tell developers never to move users out of the host surface automatically and describe tasks completed without switching tabs or apps. Interactive widgets that render inside the conversation, in sandboxed frames, are offered through a feature Google labels as beta and says may not be available, with a 15 MB cap on any single interface resource and 100 MB in total. Haynes' description fits where the guidelines are heading more than what the Search help page currently says.

The rules: ads, data and reliability

Google's Connected Apps policy, last updated September 28, sets the commercial terms most relevant to marketers. Partners must not serve third-party advertising or promotional material through their integrations. Apps must exchange only the minimum data needed for their active features, must publish a privacy policy, and may not exchange or share user data for payment. Impersonation is banned. Apps that consistently return errors, crash, time out or fail authentication are prohibited, and Google may reject an app at submission or suspend it later.

The technical bar is specific. A cloud-hosted MCP server must be publicly reachable over HTTPS, with one global endpoint per app and no separate data-center addresses. Domain ownership is proven with a verification file on the developer's site. Apps that act on a user's account sign users in through OAuth and Google Account Linking, with PKCE mandatory under OAuth 2.1, and tools flagged as destructive trigger a confirmation prompt before they run. Location is optional per tool: approximate, covering at least 3 square kilometers, or precise to within 50 meters, the second limited to Gemini and to permitted verticals. The platform supports MCP versions up to 2025-11-25, and changing a server's schema can break the integration and lead to the app being disabled.

The listing is short. Each app needs a description under 30 words, at least three capabilities and at least three example prompts, which are shown to users deciding whether to connect. Once a developer picks a category for the app, it cannot be changed. One of the OAuth pages, last updated on September 14, still refers to the tool as a Gemini MCP console, a sign that the tooling began on the Gemini side before Search was added.

What the documentation does not include is as telling. No page describes fees, a revenue share or payments to Google. Analytics in the Google Connected Console cover traffic, latency and error rates, according to the October 28 post, and nothing in the documentation describes conversion reporting.

Why this matters for the marketing community

Haynes' case is that the value in AI search will flow to businesses whose services Google's agents can use, not to those optimizing for citations. Pichai made a similar case in remarks to analysts on October 28: agentic features would come to Search next, and agents would act as a unifying layer across Google's products, including Chrome, Android and Workspace. If that happens, the work changes. Building a connected app means running a server, handling OAuth, passing Google's review and keeping error rates low enough to avoid suspension. That is closer to product engineering than to the content and technical work SEO has usually meant.

The gap is in the details that would let anyone plan. A website can be measured against rankings, impressions and clicks in Search Console. A connected app is chosen by a model's planner under rules that are not published, and Google's policy forbids trying to steer that choice. On the Search side, the audience is limited to signed-in US users of AI Mode in English who choose to connect an app, from a list of five.

Advertising sits at an awkward angle. On the same day as the preview, Google said it would expand ads in AI Mode to 10 more countries and launch multiturn ads in the US. Connected app partners, by contrast, may not carry third-party ads in their integrations. The documentation does not say whether Google's own ads can appear alongside a connected app's results in AI Mode, or whether app interactions inform ad targeting. The Gemini app, where most connected apps live, carries no ads; Google's Dan Taylor said in January there were no plans to change that.

Google is also tightening rules for the indexed web while it opens this gate. On October 26, it revised its user-generated spam guide to name tools that let users publish shared pages, generated content or web apps as open to abuse, and to say pages built for direct sharing should not be indexed by default. Haynes read the change as a warning of manual actions to come. "It sounds to me like this is aimed at AI tools that let users make their chats and apps they make with the tools indexable by Google," she wrote. The two moves differ in kind, but together they describe a Google that wants AI-built tools inside its interface on its own reviewed terms, and is wary of them in the index.

For now, Mueller's own words may be the most accurate summary: "It's still extremely early."

Timeline

Summary

Who: Marie Haynes, an Ontario-based search consultant who runs a newsletter and the paid Search Bar Pro community, and John Mueller, a Senior Search Analyst and Search Relations team lead at Google, commenting in a personal capacity. Google built the Connected Apps Platform the two discussed.

What: Haynes told her readers that Google's Connected Apps Platform is the main opportunity in AI search, ahead of GEO, and urged them to start building for it. Mueller called connected apps "a search platform" while noting that the product is outside Mueller's own work. Google's documentation shows Search support limited to AI Mode in US English with five apps, no published method for choosing between apps, no fees described, and a policy barring third-party ads in integrations.

When: The newsletter is dated October 29, 2026, a day after Google opened the preview on October 28. Google updated a developer prerequisites page on October 30, and four launch partners are due in Search in the coming weeks.

Where: Google Search, through AI Mode, and the Gemini app. The Search feature is limited to the United States and English; Gemini availability varies by app and country.

Why: Haynes argues that businesses will be found in Google's AI products by being useful to agents rather than by being cited, and points to her own analysis showing ChatGPT sending a small share of the traffic Google does. For marketers, connected apps shift the work from content toward software that Google reviews and a model selects, under rules on ranking, measurement and advertising that Google has not yet published.