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my agent bought me the wrong flight solution is simple: introducing Agentcard Vault. share your card safely with your agent and buy anything online - use any card (including Chase) - share it with any browser, like KERNEL - approve transactions with Face ID - native integration with Linq... show more
31,455 views • 20 days ago •via X (Twitter)
32 Comments

using your credit card to buy with your agent shouldn't be a problem. current solutions for agentic payments didn't work (and we tried them all). issuing one-time cards has a lot of limitations (no recurring subscriptions, no disputes), and tokenizing cards works for only 8% of the cards we've tried. the final solution is a Vault: store any card and share it safely with the browser completing the purchase

using a user's card in an agent browser shouldn't require you (or them) to be PCI compliant. that logic should be abstracted by companies like us. build your agent, and we will provide the payments infrastructure happy to share that Agentcard's Vault works natively on @usekernel and integrates smoothly with @thelinqapp

transactions get approved fast and easily with Face ID. we already do it when paying with Apple Pay. consumers get it, it's low friction and embedded in the iMessage experience if you want to make safe purchases with your agent, go to @endstack and @pallyai (a LOT more agents implementing as we speak)

let your agent buy anything online. start implementing Agentcard's Vault today:

@usekernel Nobody can see the card details but you. Truly amazing work team!

@usekernel thank you!!!

@usekernel so great to work with you on this, congratulations on the launch! 🤝

@usekernel this is an awesome proof of security to highlight on the website

@usekernel sick

@usekernel This is why you use

@usekernel do it safe with @agentcardhq

@usekernel agentic commercie is evolving so fast. great launch!

@usekernel Agents handling payments changes the game. Secure approvals with Face ID and PCI compliance could make autonomous purchasing much more practical. 🔥

@usekernel great launch

@usekernel thank you!

@usekernel 🚀

@usekernel share your card safely or we can get greedy

@usekernel loving the launch

@usekernel @RoscoKalis

@ycombinator @usekernel Agentic commerce is the future

@usekernel if the card was never the problem, why did the wrong flight get bought

@usekernel authorization

@usekernel An agent buying the wrong flight is the exact failure mode that makes me nervous about "just let it spend." Guardrails beat vibes when money moves.

@usekernel wrong flight is the whole category. the agent can pay. it shouldn’t be allowed to finish that charge. we already put a cap + an approval on the purchase before it clears. if you want that vault to fail closed on the next bad buy, i’ll hook it.

@usekernel An agent booking the wrong flight is why I won't "just let it spend." Money moving without a hard stop is vibes in a suit.

@ycombinator @usekernel How’s this different than 1password ?

@ycombinator @usekernel if you are a company you can't use the cc that your users have on 1pass to complete a payment on their behalf without being PCI compliant yourself

@ycombinator @usekernel What about normal user ? Will they be able to do that ?

@ycombinator @usekernel yes, you can use your own cards from 1pass if you are making a purchase on the browser with an agent

LFGGG! 🔥🚀

@usekernel The token got nuked

@usekernel That's the part nobody's really solved yet. Auth stacks were built around card-present humans, and agent transactions blur that line completely. If the flag doesn't survive to dispute time, the whole liability model gets messy.
