Giving an AI Agent a Wallet? Put These Guardrails Outside the Model
DayKnown1050 · reddit · 2026-10-29
A crypto backend developer shares a guardrail blueprint for AI agent payments (x402 alone has passed 100M transactions). Core principle: limits live in code, not prompts. Key practices: keep private keys in a separate signing service (KMS/MPC), hard per-tx/daily caps with a small hot-wallet balance, recipient allowlists with human approval for new ones, simulate transactions before sending, guard against prompt injection from any content the agent reads, log intent plus tx hash, and keep a team-accessible kill switch — the same discipline exchanges apply to hot wallets.
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