By early 2026, the question had stopped being theoretical: How do you let an AI agent buy things without essentially handing your wallet to a black box?
Dasmer Singh thinks he has an answer, and it's almost absurdly simple. Generate a card number that works exactly once, at exactly one store, for exactly one amount. Then burn it.
That's the premise behind Allowance, a startup that slipped out of Y Combinator's Spring 2026 cohort and onto the iPhone App Store on April 29 with what the company describes as "scoped payment credentials for AI agents." Translation: temporary virtual cards that self-destruct after a single use, preventing your helpful AI assistant from going rogue at checkout.
The infrastructure problem is real, if still somewhat niche. As AI agents graduate from answering questions to booking flights and ordering dinner, someone has to figure out the payments layer—and none of the obvious solutions are particularly satisfying. Hand the agent your actual card details? Terrifying. Set up a separate bank account? Clunky. Hope the agent asks permission every single time? Well, that's actually what Allowance does, though with considerably more friction-reduction built in.
The Explicit Approval Problem
Singh's system requires human sign-off for every transaction. No blanket permissions, no open-ended authorizations that might let an overeager agent decide you really need seventeen pairs of running shoes.
The flow starts when you tell your agent to do something—"book me a flight under $500" or "grab coffee from that place on Market Street." The agent pings Allowance. Your iPhone lights up with an approval request. You confirm the merchant, the amount, the expiration window. Allowance spins up a one-time virtual Mastercard or Visa number and hands it to the agent, which completes checkout using credentials it can only use once. Your real card number stays vaulted with what the company says are PCI-compliant providers.
After the charge clears, the virtual card dies. Receipts and transaction logs live in the app. If something looks wrong mid-purchase, you can revoke the credential instantly.
It's a setup that prioritizes control over convenience—perhaps more than some users will tolerate long-term, though that calculus depends heavily on how much you trust your AI assistant not to improvise.
What Works (and What Doesn't Yet)
Right now, Allowance supports personal Mastercard and Visa cards. The company recommends Mastercard, for reasons it doesn't elaborate on publicly. Chase cards don't work yet. Business cards don't work yet. The whole thing is US-only. There's no fee structure beyond "free for now."
On the technical side, the app integrates with OpenAI Codex, OpenClaw, and Claude Desktop. Setup involves pasting a configuration string into your agent to enable the Allowance CLI and authentication flow—a process the company's install page describes as working "best with Codex," which may or may not be a diplomatic way of saying the other integrations are still a little rough.
The app itself launched as "Allowance — Agent Wallet" in late April, with a minor update in mid-May. It requires iOS 18 or later. User reviews started appearing within hours of the initial release, suggesting at least a handful of early adopters had been kicking the tires during beta.
A Market That Suddenly Exists
Here's the strange part: Allowance isn't remotely alone in this.
On the exact same day the company released version 1.0, Stripe announced that Link now supports agent approvals and can issue scoped credentials—either one-time virtual cards or what Stripe calls Shared Payment Tokens, with time and amount boundaries built in. Stripe published developer documentation and a Link CLI for agent integrations, effectively rubber-stamping the concept of scoped credentials at scale.
Mastercard had already moved in March, introducing "Verifiable Intent," a mechanism to record user authorization and bind agent identity during transactions. Visa followed on April 29—again, the same day as Allowance and Stripe—with an "Agentic Ready" program for Latin America and the Caribbean, built around agent-bound tokens and explicit consent checkpoints.
Then there's the cluster of startups chasing the same idea. AgentPay: single-use virtual Visa cards with hard spend limits, saying it'll launch in the US soon. Shatale: virtual cards for AI agents with real-time policy enforcement, claiming global availability. Cosign, Walleot, Argus—all variations on wallets or cards that agents can use within tight guardrails.
Even Coinbase got in early, launching Agentic Wallets in February—programmable crypto wallets for agents, though the rails are different. The pattern holds: constrained transacting, hidden credentials, mandatory user approval.
It's a crowded field for a problem most people didn't know existed six months ago.
The Consumer-First Angle
According to his Y Combinator profile, Singh's background tilts heavily toward consumer payments infrastructure. He previously led product for Cash App Families and held roles at Uber, Petal, and Venmo. Columbia undergrad, Stanford GSB. According to Y Combinator's profile, the team size is listed as one—though that may simply be outdated, given how these listings lag behind actual hiring.
That consumer fintech pedigree shows. Where many competitors aim at developers or enterprise customers deploying agent fleets, Allowance leans into individual use cases: ordering coffee, booking flights, buying concert tickets. The approval interface is iPhone-native, not a developer dashboard. It's a bet on power users rather than businesses, at least for now.
The timing lines up with a broader realization that payments infrastructure for agentic AI has serious gaps. An IMF staff note published in May called out the need for better identity verification and intent-recording mechanisms in agent transactions. Industry white papers from Mastercard and others, released between March and May, hammer the same themes: scoped credentials, agent identity binding, proof of user intent. The consensus is forming in real time.
Early Days, Plenty of Unknowns
Allowance is still in what feels like public beta, even if the company isn't calling it that. The US-only footprint, the exclusion of Chase and business cards, the absence of a clear revenue model—all signs of a product still figuring out its shape.
The FAQ doesn't say which issuing bank or BIN sponsor backs the virtual cards. There's no public fundraising announcement beyond the YC batch involvement. And while the one-time card approach has the advantage of slotting into existing payment rails—any merchant accepting Mastercard or Visa can theoretically take an Allowance credential—it's not clear whether that's enough of a moat as the space matures.
Some of the emerging standards, like Agent Commerce Protocol or Mastercard's newer tokenization schemes, require merchant buy-in. Allowance sidesteps that by working within the legacy card networks, which is either smart pragmatism or a tactical retreat from harder infrastructure problems.
Whether Singh's bet pays off probably depends on how quickly AI agents evolve from experimental toys into autonomous buyers making dozens of transactions a week. That future may be closer than it sounds, or it may take years. Either way, for the early adopters willing to let their AI loose with a credit card, Allowance offers something resembling a leash.
The virtual card burns itself after each purchase. The receipts, at least, stick around.
