[3 Reads] AI agents in MegaCryptoPolis / XRPL agent payments / AI purchase authorization + take
Today's 3 Reads
MegaCryptoPolis pivots toward an AI agent game
MegaCryptoPolis, a multichain simulation game launched in 2018, has announced a pivot toward an AI agent game. Players will give their Citizens goals and let them work, trade and manage assets within the existing city economy. In the earlier MegaWorld gameplay, couriers made deliveries to player-owned buildings and received payments from their owners. Source: https://www.blockchaingamer.biz/news/43030/megacryptopolis-ai-agent-pivot/
Privy and Ripple partner on wallets for XRP Ledger
Stripe-owned Privy announced a partnership with Ripple to bring wallet infrastructure to the XRP Ledger. Developers will be able to create wallets and sign transactions programmatically. The offering supports XRP and RLUSD, as well as x402 payments for AI agents. Source: https://coinpost.jp/?p=742649
Amex introduces a framework for authorized AI agent purchases
American Express is introducing a framework designed to limit AI agent purchases to those authorized by users. The move comes as AI-powered shopping grows. The company aims to reduce costly mistakes and purchase disputes through the framework. Source: https://techcrunch.com/2026/10/13/amex-introduces-a-framework-to-prevent-ai-agents-from-making-unauthorized-purchases/
On-Chain Data
Ethereum chain TVL: $51.24B [Source: DefiLlama] (as of Oct 14, 2026 06:30 JST) TVL describes the value of assets deposited on a chain. It should be distinguished from game user counts or revenue.
Take
My reading of these three stories is that they put the scope of an AI agent’s authority in focus. MegaCryptoPolis proposes giving in-game Citizens goals and letting them act within a city economy. Privy is bringing wallet infrastructure to XRP Ledger with support for agent payments. American Express is addressing whether a purchase was authorized by the user. These are separate products and use cases, but each raises a practical question: who sets the limits on what an agent may do?
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