Shinhan will test its stablecoin on Visa’s platform, and the crypto industry told Treasury where identity checks should stop

Shinhan Financial Group signed a strategic business agreement with Visa in Seoul on 26 August 2026, Shinhan chairman Jin Ok-dong and Visa president Chris Newkirk doing the signing, and the first work item is stablecoins. The Block reports that Shinhan will use Visa’s stablecoin platform to validate token issuance, transfers and redemption, with the two companies co-designing business models for South Korea’s regulatory framework, and pilots planned for stablecoin card settlement, AI-based payment models, and B2B and B2C payments [1]. Crypto.news carries the same three functions and the same Korea-first framing [2].

The word doing the work in that announcement is validate. Issuance, transfer, redemption is the whole life of a stablecoin, and a banking group that owns a bank, a card company and years of settlement plumbing has chosen to prove all three on somebody else’s platform before Korea’s own digital-asset rules have settled. I have sat through enough build-versus-buy meetings on payment rails to read that choice: the group is buying an answer to a regulatory question, not a piece of software. If the platform can show a regulator issuance, transfer and redemption working under controlled conditions, the licence conversation starts from evidence instead of slideware.

It also tells you where the networks think their next decade lives. Visa’s role here is landlord of the test environment, and rent on that room compounds nicely across every bank that signs a similar page.

The industry asks Treasury to draw the perimeter tight

The Blockchain Association announced on Monday that it had submitted a comment letter on the joint proposed stablecoin rules under the GENIUS Act, the rulemaking that runs across Treasury’s Financial Crimes Enforcement Network, the Office of the Comptroller of the Currency, the Federal Reserve, the FDIC and the National Credit Union Administration [3]. Treasury opened the comment period on the proposal itself [4].

The association’s asks, per The Block: limit customer identification obligations to the primary market, meaning the direct relationship between an issuer and its customer; keep peer-to-peer secondary transactions outside issuer compliance; and define account, customer and digital asset service provider more precisely, with one-off redemptions excluded [3].

Whichever way the agencies land, that boundary is the one that matters for agents. An AI agent holding a funded wallet mostly lives in the secondary market: it receives tokens, it spends tokens, and it may never once stand in front of the issuer. If identity checks stop at the primary market, the agent’s wallet is identified once, at funding, by whoever funded it. Every hop after that is somebody else’s log. That is not an argument against the association’s position, which tracks how cash and card rails already work. It is the place to look when you want to know what an agent transaction will legally require, because today the honest answer is a definitions section that five agencies are still drafting.

The Assistants API is gone, on schedule

Sunday’s brief flagged the date, and the date held. OpenAI’s deprecations page, read today, lists the Assistants API as shut down on 26 August 2026, with the Responses API and the Conversations API as the replacement and a migration guide for moving Threads to Conversations [5]. A deprecation with a year of notice still ends the same way: something in a back office stops answering this morning, and the person who wired it up left in the spring.

If your stack went quiet today, start there before you start anywhere else.

What I would do this week

If you touch stablecoins in any form, read the association’s asks as a map of where compliance costs will sit, then work out which side of the primary-market line your product stands on. An issuer-side product inherits the customer identification programme. A secondary-market product inherits whatever the definitions say, and the definitions are precisely what the letter is trying to move. Writing your own answer down now, before the agencies write theirs, costs an afternoon.

The comment file is open, Comptroller of the Currency Jonathan Gould has said the OCC intends final stablecoin rules by November, and the GENIUS Act’s effective date is 18 January 2027. Shinhan and Visa plan to be through their validation work while the rest of the market is still reading the preamble.