Rain, Visa, Mastercard and 23 other payment and crypto firms just formed a coalition to write the rulebook for AI agents that buy things on your behalf, before regulators do it for them.
On August 18, 2026, stablecoin infrastructure company Rain launched the Agentic Payments Alliance, a 26-member coalition that includes Visa, Mastercard, Circle, the Solana Foundation, Uniswap Labs, Fiserv, Fireblocks, Chainalysis and Remitly. The goal is blunt. Build shared standards for how an AI agent proves who it's acting for and how much it's allowed to spend. Then make sure a bank or merchant can tell it apart from a fraud bot, before every company builds its own incompatible version.
"No single company should get to decide how agents transact on someone's behalf," Rain co-founder and CEO Farooq Malik said in announcing the alliance. That's the whole pitch. Nobody wants Visa's version of agent identity to lock out Mastercard's rails, or Circle's stablecoin settlement to sit unreadable to a bank running Fiserv's systems.
You've probably already run into an AI agent that couldn't finish a purchase. It drafted an email instead of booking the room, or stalled out asking you to re-enter a card number it technically already had. That gap, an agent that can plan a purchase but can't actually authorize and settle it, is what this alliance exists to close.
McKinsey projects agentic commerce, AI systems buying goods and services - subscriptions included - on a person's or company's behalf, could reach $3 trillion to $5 trillion globally by 2030. That's real money. It only shows up if agents can move it without a human clicking confirm every time.
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The rest of the founding roster reads like a map of who actually touches a transaction: Avalanche, Basis Theory, Coinflow, Crossmint, Episode Six, Evertec, Kala, Lithic, Monad, PayOS, Sardine, Shift4 and Turnkey, alongside fraud-detection firm Chainalysis and crypto custody provider Fireblocks. That's 26 companies in total. The alliance runs as a coalition governed by its members, not owned by Rain or any single company. Its early work covers shared research on agent identity and testing authorization standards. It's also lobbying regulators on questions nobody in Washington has answered yet.
Visa and Mastercard already have their own answer #
Visa and Mastercard didn't wait around for the alliance's rulebook. Both have already shipped their own competing protocols. Visa's Trusted Agent Protocol, introduced in 2025, gives merchants a cryptographic way to verify that a checkout request came from a real, authorized agent rather than a bot, using a signed timestamp and session ID that can't be reused. Visa built it partly in response to a surge in AI traffic hitting retail sites, traffic the company says has grown 4,700% as shopping agents crawl product pages looking for things to buy.
Mastercard took a different technical route. Its Agent Pay for Machines platform, which launched June 10, 2026, stores agent credentials and spending permissions directly on public blockchains, including Polygon, Solana and Base, so payments can settle in fractions of a cent at machine speed. More than 30 companies, including Stripe, Coinbase, Adyen and Cloudflare, have signed on to support it.
Here's the tension the alliance actually has to solve. Visa wants agent identity handled through its own tokenized infrastructure, kept off-chain. Mastercard wants that same identity living on public blockchains. Both companies joined Rain's alliance anyway. That tells you neither one wants to be the network agents avoid because its rules don't talk to everyone else's.
The rulebook nobody in Washington has written #
Congress hasn't given anyone a reason to wait. The CLARITY Act, the bill meant to set federal rules for digital asset markets, remains stalled, leaving stablecoin and agent-payment standards to whoever ships first. Rain itself already processes stablecoin payments at more than 100,000 merchants, according to remarks from Malik reported by The Block, mostly without those merchants realizing the settlement layer underneath runs on crypto rather than a card network.
Frankly, the interesting part isn't the press release. It's that Visa and Mastercard, two companies that fight over every basis point of interchange fee, are sitting in the same coalition as Circle and Uniswap Labs to write rules neither can unilaterally control. That doesn't happen because everyone suddenly likes each other. It happens because whoever's protocol becomes the default for a $3 trillion market doesn't have to win a lobbying fight to keep it.
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