What are Spending Controls?

1 min read Updated

Spending controls are programmable rules limiting how, when, and where an AI agent can spend crypto — per-transaction limits, rolling budgets, recipient whitelists, token restrictions, and velocity checks enforced before signing.

WHY IT MATTERS

When an agent has wallet access, it can technically drain every token. Spending controls constrain this to match the operator's intent — the financial equivalent of a sandbox.

Controls work at multiple levels: per-transaction (no single spend above $X), per-period (max $Y/hour), per-recipient (approved addresses only), per-token (USDC only). The combination creates a comprehensive safety net.

Unlike prompt-based guardrails that can be jailbroken, infrastructure-level spending controls operate outside the LLM's reasoning loop. The agent can't talk its way past a spending limit.

HOW POLICYLAYER USES THIS

Spending controls are PolicyLayer's core product — a declarative way to define, deploy, and enforce spending rules for any agent handling crypto. Rules evaluate in real-time before signing and update without redeploying agents.

FREQUENTLY ASKED QUESTIONS

Can't I just use prompts?
No. Prompt instructions can be overridden through jailbreaking, injection, or uncertainty. Controls must be at the infrastructure level, outside the LLM, to be reliable.
What happens on violation?
The transaction is blocked before signing. The agent gets an error, the violation is logged, and alerts or HITL approval may be triggered.
Same as smart contract permissions?
Related but different. Smart contract permissions are on-chain. Spending controls can work off-chain before signing — more flexible and lower latency. PolicyLayer enforces both.

FURTHER READING

Let agents act without letting them run wild.

Deterministic policy on every MCP tool call. Per-identity grants. Full audit log.

Currently onboarding teams running MCP in production.
// GET IN TOUCH

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

Message sent.

We'll get back to you soon.

// REQUEST EARLY ACCESS

We're letting people in as fast as we can.

You're in the queue.

We'll be in touch as soon as we can let you in.