Pick your brand of tennis balls to chip in for tennis
Mission Parameters
🎯 Buyer Preferences
MCP tool: buyer_set_preferences
These preferences scope the agent's mission — the spending cap and brand constraint are embedded in the authorization request and enforced by Keycard governance.
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AAuth Protocol Flow
Watch the 4-party authorization in real-time
Agent
MCP Server
AAuth.dev
Keycard
Link by Stripe
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Add items and click Checkout to see the AAuth protocol flow animate