MoonPay Wires MPC-Secured Wallet Into ChatGPT, Claude via $100M Sodot Buy
PayBox lets AI agents in Claude and ChatGPT initiate crypto and card payments, with keys split by MPC/TEE tech from MoonPay's April Sodot acquisition.
MoonPay has shipped PayBox, a payment vault embedded directly inside Claude and ChatGPT that lets AI agents initiate transactions on a user’s behalf. The launch, announced July 29, marks one of the first attempts by a mainstream crypto payments firm to give large language models direct spending rails rather than just read-only wallet access.
Key management split three ways
The vault stores both crypto wallets and payment cards, and functions as the custody layer sitting behind the chat interface. A user states an intent inside Claude or ChatGPT, the agent structures the transaction, and the human signs off with a passkey before funds move.
Custody is engineered so no single party — not MoonPay, not the AI model itself — can unilaterally access funds or sign a transaction. That’s done through a combination of multi-party computation (MPC) and trusted execution environments (TEE), splitting signing authority across independent components rather than resting it with one key holder.
The architecture runs on technology from Sodot, an Israeli key-management firm MoonPay acquired for roughly $100 million in April. The Sodot deal now looks less like a bolt-on acquisition and more like the infrastructure bet underpinning MoonPay’s push into agentic payments — the kind of vertical integration that matters when the counterparty executing a transaction is a model rather than a human.
Why the custody model is the story
For a data-focused audience, the relevant detail isn’t that a chatbot can now “pay for things” — it’s the specific threat model MoonPay is designing against. Handing an autonomous agent standing wallet access without a signing bottleneck creates an obvious single point of failure: a compromised model, a prompt injection, or a malicious plugin could theoretically drain a vault with no human in the loop.
By requiring MPC/TEE-distributed signing plus a passkey confirmation, MoonPay is effectively keeping a human checkpoint on every transaction while still letting the agent do the transactional legwork — assembling routes, selecting assets, formatting the payload. That distinction between agent-initiated and agent-authorized is likely to become the standard fault line regulators and security auditors focus on as agentic-payment products proliferate.
What it signals for the sector
PayBox lands at a moment when both AI labs and crypto infrastructure firms are racing to define how autonomous agents touch real money. Embedding a wallet directly at the model layer — rather than through a third-party plugin marketplace — gives MoonPay a distribution foothold inside two of the most widely used chat products on the market.
For traders and on-chain researchers, the launch is worth tracking less for retail hype potential and more as an early signal of where custody providers are positioning key-management stacks for agent-driven flows — a segment that, if it scales, could start showing up as a distinct wallet-activity category in on-chain data.
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