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Notes on letting AI agents
spend money safely.

Deep dives, patterns, and post-mortems on policy-controlled spending, approvals, and audit logs for AI agents.

April 19, 2026·5 min read
The three-layer architecture of policy-controlled agent spending
A technical breakdown of the three layers every agent spending system needs: policy evaluation, approval routing, and immutable audit logs. With Python interfaces for each.
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April 18, 2026·5 min read
How to stop AI agents from overspending
Three failure modes cause AI agents to overspend: prompt injection, retry loops, and unbounded authority. Here are the specific controls that stop each one.
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April 17, 2026·4 min read
Why AI agents need policy-controlled spending
AI agents that can spend money are now in production. Without policy controls, approvals, and audit logs, that's a liability. Here's how PayGraph solves it.
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April 17, 2026·6 min read
When AI agents should ask a human before spending
Human-in-the-loop AI payments need clear triggers, not vibes. Here are the three triggers that matter, the UX patterns that work, and the dollar thresholds that hold up in production.
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April 16, 2026·5 min read
Scoping tool permissions for autonomous AI agents
Autonomous agents with broad tool access are a blast radius waiting to happen. Here's how to apply least privilege to agent toolsets with per-tool policy binding.
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April 15, 2026·5 min read
A practical guide to AI agent budget limits
AI agent budget limits work at five levels: per-tool, per-transaction, per-category, per-day, per-agent. Here's when to use each, with layered code.
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April 14, 2026·5 min read
AI agent audit logs: what they are and what they must capture
An AI agent audit log is the immutable record of what your agent tried, what policy allowed, who approved it, and what happened. Here's what every row must contain.
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Notes on letting AI agentsspend money safely.

The three-layer architecture of policy-controlled agent spending

How to stop AI agents from overspending

Why AI agents need policy-controlled spending

When AI agents should ask a human before spending

Scoping tool permissions for autonomous AI agents

A practical guide to AI agent budget limits

AI agent audit logs: what they are and what they must capture

Notes on letting AI agents
spend money safely.