signet-guardianPayment guard middleware for AI agents. Use whenever any skill is about to initiate a payment. Runs a preflight check against the user's policy (payments enabled, per-transaction limit, monthly cap). Returns ALLOW, DENY, or CONFIRM_REQUIRED. Other payment-capable skills must call signet-preflight before proceeding and signet-record after a successful payment.
Install via ClawdBot CLI:
clawdbot install rafalzacher1/signet-guardianGrade Fair — based on market validation, documentation quality, package completeness, maintenance status, and authenticity signals.
Calls external URL not in known-safe list
https://getsignet.xyzAudited Apr 17, 2026 · audit v1.0
Generated May 8, 2026
An AI agent managing user subscriptions uses Signet Guardian to preflight monthly payments. If the user has a max-per-transaction limit of £20, a £15 subscription is allowed, but a £50 one is denied unless confirmed. The agent records the payment after success, preventing duplicate charges via idempotency keys.
A cloud AI assistant processes pay-as-you-go API calls for a business client. Before each call, it invokes signet-preflight to check the per-transaction and monthly caps. A series of small calls under the threshold proceed automatically, while a large bulk request triggers a confirmation prompt.
An AI shopping assistant handles checkout on behalf of a user. It calls signet-preflight with the cart total, currency, and merchant name. The policy blocks merchants on the blockedMerchants list, and requires confirmation for amounts above £5, ensuring the user stays within their spending limits.
A freelancer uses an AI agent to collect payments from multiple clients. The agent uses Signet Guardian to enforce a monthly cap of £500 and per-transaction limit of £50. If a client tries to pay £60, preflight denies it, and the agent notifies the client to split the payment.
A personal finance AI helps a user manage charitable donations. Using Signet Guardian, it preflights each donation to ensure the total monthly donation stays under the user's set cap. If a donation would exceed the cap, it is denied, and the user is prompted to choose a different amount.
The signet-guardian middleware charges a small fee (e.g., $0.01) per preflight or record call. This scales with usage volume, making it ideal for high-traffic AI agents that process many payments.
Offer a premium tier where users can define complex policies (e.g., merchant allowlists, custom thresholds) via a UI. The core middleware is free, but advanced policy features or analytics require a monthly subscription.
Provide additional reporting tools (e.g., signet-report enhanced) as a paid add-on. Users pay for detailed spending analytics, compliance audits, or integration with accounting software.
💬 Integration Tip
Ensure your skill calls signet-preflight before any payment and signet-record after a successful payment. Use the same idempotency key for both to prevent duplicate ledger entries.
Scored Jun 21, 2026
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