What is the Agent Financial Stack?

1 min read Updated

The layered infrastructure enabling agents to hold, manage, and spend crypto — wallet infrastructure, key management, policy enforcement, payment protocols, and analytics.

WHY IT MATTERS

Like the web stack, agent finance has layers: key management, wallets (EOA/smart/MPC), policy (spending controls), payment protocols (x402/A2A), and application (agent logic).

The policy layer is critical for safety. Keys provide capability; policy provides constraints. Without it, agents have power without governance.

Understanding layers helps build secure financial systems with each handling specific concerns.

HOW POLICYLAYER USES THIS

PolicyLayer is the spending controls layer — between wallet infrastructure and application, ensuring every transaction passes policy evaluation.

FREQUENTLY ASKED QUESTIONS

Which layer matters most for security?
Policy enforcement. Keys/wallets provide capability; the policy layer constrains it. Without policy, agents have unrestricted financial power.
Can layers be mixed and matched?
Yes — the stack is designed for composability. PolicyLayer works with any wallet type, key management solution, and payment protocol.
Where does monitoring fit?
Above the policy layer. Monitoring/analytics observe agent behavior across all layers, feeding insights back into policy design.

FURTHER READING

Enforce policies on every tool call

Intercept is the open-source MCP proxy that enforces YAML policies on AI agent tool calls. No code changes needed.

npx -y @policylayer/intercept
github.com/policylayer/intercept →
// GET IN TOUCH

Have a question or want to learn more? Send us a message.

Message sent.

We'll get back to you soon.