Stripe Link Says Agent Purchases Grew 38x in September: What Is Claimed and What Is Verified

On October 18, 2026, Upstarts Media published a piece headlined "How AI Assistants Are Spending Real Money," built on data Link by Stripe shared with the newsletter first. The headline figures, as relayed on Techmeme the next morning: agentic transactions rose 38x and payment volume 20x in September, retail led both, and the average spend was about 100 dollars. It is the first number anyone outside Stripe has seen behind a claim the company's president made days earlier, that agentic commerce had gone "vertical."

It is worth reading closely, because a multiple is not a total. This post separates what is sourced, what is a growth rate with no base, and what remains unconfirmed. For the surrounding story, see our coverage of Meta Muse becoming a transaction layer and the open Personal Agent Protocol.

TL;DR: what is claimed, what is verified

What Upstarts actually reported

The open part of the Upstarts Media article gives useful context before the paywall:

• Every new AI assistant seems to announce that it handles checkout and payments through Link. Instinct, Muse and Grok Bot make purchases on behalf of users through Link, as do work-focused agents like Skydive and Town and smaller apps such as Underdog.
• Upstarts says Anthropic and OpenAI use Link, but not for agentic commerce yet.
• Link currently powers about 200 agents, according to Dan Hill. The September data was crunched when there were about 70, so the agent count has more than doubled since.
• Link has 300 million users overall across larger businesses like Airbnb, Anthropologie and Uber, so agents remain "a relatively small piece" of its reach.
• Hill's framing: "Agentic commerce is here, people are using it, it's going to keep growing," and "The volume we're seeing now is becoming very material."

The paid section holds the breakdown by category and transaction size. Techmeme's one-line summary of it is where the 38x, 20x, retail and roughly 100 dollar figures come from. We could not open the subscriber-only text, so we treat those four numbers as reported and Stripe-attributed, and do not add detail beyond them.

Why the base matters more than the multiple

A card tapping a payment terminal, illustrating how Stripe Link agentic transactions settle

A growth multiple depends entirely on its denominator. If agent purchases through Link were a few thousand dollars in August, then 20x in volume is a few tens of thousands of dollars in September, which is real growth and still not a market. If the base were millions, the same multiple would be a very different story. Nothing in the available coverage tells us which.

Two further caveats apply:

1. The sample changed during the period. The agent count was about 70 at the time of the data and is about 200 now. Growth in September partly reflects new assistants launching on Link, not only more spending per assistant. Muse launched on September 8, 2026, so a large share of September's lift could come from one product switching on.
2. Transactions grew faster than dollars. 38x in transaction count against 20x in volume is arithmetically consistent with the roughly 100 dollar average ticket, and suggests many smaller purchases appeared as the user base broadened. It does not tell us how many were repeat buyers.

The "vertical" claim that came first

Two days before the Upstarts data, Forkast published a skeptical piece arguing that Stripe's president had not shown the numbers. According to it, John Collison said on an October 12 episode of the Cheeky Pint podcast, which he hosts: "It only as of September basically started going vertical." The conversation included Meta CEO Mark Zuckerberg and chief AI officer Alexandr Wang, and Collison credited the consumer launch of Muse and the arrival of computer use: "now you can ask your muse to buy anything, more or less."

Forkast adds other points worth keeping straight, all attributed to that outlet's reporting:

• Muse reached 2.18 million daily active users by October 5. Other estimates differ; we covered a reported plateau at 2.5 to 3 million and the numbers disagree by source.
• At Sessions in April 2026, Stripe announced 288 products focused on agentic commerce, including Link wallets for agents, shared payment tokens and an Agentic Commerce Suite.
• Stripe agreed in June to acquire OpenRouter for 7.5 billion dollars, which Forkast says gives it a view of both payments and model routing.
• An earlier try went poorly: Instant Checkout inside ChatGPT, launched with OpenAI in September 2025, was retired by March 2026 after near-zero sales from the dozen or so Shopify merchants that went live, per reporting Forkast cites.

So the Upstarts figures are best read as Stripe finally putting numbers behind an assertion it had made on a podcast. That moves the claim from unfalsifiable to partly checkable, but only partly.

What the numbers do and do not show

A small shopping cart with a green price tag, standing for retail-led agent purchases on Link

On trust, Forkast cites Product.ai data from April 2026 that only 14 percent of consumers trust AI to complete purchases without manual verification, and PYMNTS Intelligence data from September that 93 percent of merchants believe AI or agent providers should bear the loss when an agent buys the wrong thing. We did not verify those surveys independently; they point to why the money layer is still where adoption is hardest.

Context: the agentic checkout race

Agent payments are crowded. Meta's Muse routes purchases through Stripe Link and Shopify Shop Pay, and we wrote up the Shopify and Meta agentic Shop Pay checkout. Amazon has taken the opposite stance, as covered in our post on Amazon blocking Meta's Muse shopping agent, and Paul Graham called that a startup opportunity in agentic commerce. Google has its own Universal Cart, and developers are wiring Link into agents directly, as in the LangChain restock agent guide.

If you want to compare the assistants that sit on top of this plumbing, our Dots vs Grok Bot vs Muse comparison lays out how each handles actions and approvals.

Risks the growth curve brings with it

Faster agent spending means faster mistakes. The same month, American Express published a framework on intent for AI agents and unauthorized purchases, and a study found that AI agents can recommend pricier options to wealthy users. A 100 dollar average ticket sits in the range where a wrong purchase hurts the user but is rarely escalated, which is exactly where silent errors accumulate.

If you build or run agents that spend money, an agent security layer matters: AgentBeam, built by the explainx.ai team, stops AI agents before they take dangerous actions, which includes unapproved purchases.

What this means for what you build or pay

• Design the approval flow first. Link's agent wallet issues one-time cards or shared payment tokens per request, so the control point is the approval step. Decide what the user confirms and what is automatic.
• Set spending caps and per-merchant limits. With an average near 100 dollars, caps at a few multiples of that stop most runaway cases.
• Log intent with every purchase. Disputes will ask what the agent was told to do and what it did.
• Ask for absolute numbers. If a vendor pitches you on "20x growth," ask for the base, the cohort and the period before you size a market.
• Watch the next data point. Stripe has the best view of this market. If it publishes totals or October figures, update your estimate.

How to check this yourself

1. Open the Upstarts article and read the unlocked portion; the paid text holds the category and ticket-size breakdown.
2. Compare with Collison's remarks on the October 12 episode of Cheeky Pint.
3. Look for Stripe's own newsroom or Link documentation to publish totals; as of this writing, we found none.
4. Cross-check Muse usage claims against more than one estimate, since they diverge.

Bottom line

Stripe's September numbers are the first concrete evidence behind the "going vertical" line: large multiples, retail first, tickets near 100 dollars, and a roster of agents that has nearly tripled. They are also growth rates from an undisclosed base, supplied by the company that benefits from the story, across a sample that was changing as it was measured. Read them as a strong directional signal, not a measured market size, and revisit when totals appear.

Figures and quotes are accurate as of October 19, 2026, as reported by Upstarts Media and Forkast; Stripe has not published absolute totals that we could find.

Related reading

• Meta turns Muse into a transaction layer with PayPal, Shopify and Expedia
• Meta Muse daily users reportedly plateau at 2.5 to 3 million
• Personal Agent Protocol: Sierra, Meta, Walmart and Stripe
• Shopify and Meta agentic Shop Pay checkout
• Amazon blocks Meta's Muse shopping agent
• Amex intent framework for unauthorized agent purchases
• LangChain restock agent with Stripe Link