By cryptoadmin Happy Wednesday,
This is your institutional newsletter, Crypto Long & Short. This week:
- Albert Castellana of GenLayer Labs on who covers the loss when an AI agent’s payment goes wrong
- Top headlines institutions should pay attention to by Francisco Rodrigues
- “Hyperliquid volume vs. HYPE price” in Chart of the Week
Thanks for joining us!
– Kim Klemballa
AI agents can pay for things online but can’t dispute a charge
– by Albert Castellana, co-founder and CEO, GenLayer Labs
Card networks just backed a payment system with no standard way to dispute a charge.
In July, the Linux Foundation switched on the x402 Foundation, which governs the standard that AI agents use to pay for things online. Visa, Mastercard and American Express are among its 17 premier members, the top governance tier.
All three now help govern a payment standard with no standard dispute process. Once a stablecoin payment settles onchain, there is no issuer to call and no network chargeback to file.
Mastercard said at the launch that internet-native payments will need the same secure, trusted and interoperable foundation as today’s digital commerce. Trust in card payments has a specific mechanism behind it, and has had one for over 50 years.
The right to dispute a credit card charge has been law in the U.S. since 1974, when the Fair Credit Billing Act passed. It’s one reason people became willing to buy from strangers online. If the parcel never turns up, you can call your bank and the money comes back.
The x402 protocol leaves that out on purpose, and the reasoning was sound. Payments can settle in hundreds of milliseconds and cost a fraction of a cent, which makes machine-scale micropayments possible. When Coinbase published the protocol in May 2025, usage was sparse, and it was a fair trade.
There is another difference that matters even more. Every safeguard the card industry built assumes a person notices something is wrong and complains. In x402, the buyer is often software, and software doesn’t read statements.
In July, researchers at the Swiss Federal Institute of Technology in Lausanne (EPFL) and Zhejiang University published the first systematic security study of live x402 deployments. They tested 15 facilitators, the intermediaries that verify a payment and push it onchain, and every one broke at least one of eight safety rules the researchers defined. On Base, close to 2% of settlement attempts reverted in late 2025, which is around 1.9 million payments.
Crypto Long & Short 
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Latest Research
The Future of Equity Ownership: An Issuer's Guide to Tokenized Equities
The Future of Equity Ownership: An Issuer's Guide to Tokenized Equities
Tokenized equities are coming with or without issuers. Issuer-sponsored models make the token the share itself, preserving control and full rights.
By CoinDesk Research Sep 29, 2026 Commissioned byBullish
Tokenized equities are coming with or without issuers. Issuer-sponsored models make the token the share itself, preserving control and full rights.
Why it matters:
Tokenized equities are coming with or without issuers. Issuer-sponsored models make the token the share itself, preserving control and full rights.
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