a builder on reddit asked how others are handling payments for AI agents. they said they could duct-tape stripe and a database, but they need per-agent limits, an audit trail for regulators, and portable agent history across environments.
i built mnemopay to solve exactly this. here's what it does:
per-agent limits
every agent gets a spending profile: daily cap, per-transaction max, approved merchant categories. limits adjust dynamically based on the agent's reputation score (agent fico).
audit trails for regulators
merkleaudit logs every payment decision in a tamper-evident chain. if an auditor asks "did this agent authorize this $47 charge on march 3rd?", you hand them a cryptographic proof, not a pile of postgres logs.
under EU AI Act article 12, high-risk AI systems must keep detailed logs. if your agent can move money, you're high-risk. mnemopay bundles the logs in a format auditors actually want.
portable memory between environments
agent memory (transaction history, reputation, dispute record) is stored in a signed, portable format. when you move an agent from your dev environment to production, or share it with a partner's MCP server, its history comes along.
stripe + postgres gives you payment processing. it doesn't give you governance, auditability, or cross-environment agent identity. mnemopay does.
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