paymaster
Verifiable receipts for AI agent spending
paymaster is a reference implementation for tracking who authorized an AI action, what policy decided, what it cost, and what the provider confirms. It is built for developers who need auditable evidence around autonomous spending, not a full financial control system.
Agenticness = how independently a tool can take action, scored across 9 dimensions. Scored independently by David Kooi, Skylark Creations — see full rubric → Last re-evaluated 29 August 2026.
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About
paymaster is an open-source reference implementation for verifiable AI agent-spend receipts. It focuses on the evidence chain around autonomous software: who acted, under whose authority, what policy decision was made, what was spent, and what the...
This is not a production financial-control product. The author explicitly says it does not move money, hold keys, execute payments, or block actions; the gate runs in shadow mode, and agents with direct provider credentials can bypass it. Its main...
Executes tasks you assign, one step at a time, within narrow domains.
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- Free / open source — full functionality available at no cost.
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