---
skill_id: aie-spend-limit-enforcer
evaluation: free
price_usd_full: 0.05
challenge: https://lvlltd.com/api/pay?skill=aie-spend-limit-enforcer
outline: https://lvlltd.com/skills/aie-spend-limit-enforcer/outline.json
standards: x402, ERC-7857
---

# Free sample — Hard-Cap Blocker Agent

**Skill ID:** `aie-spend-limit-enforcer`  
**Full unlock:** $0.05 USDC via x402 on Base  
**Challenge:** https://lvlltd.com/api/pay?skill=aie-spend-limit-enforcer  
**Outline JSON:** https://lvlltd.com/skills/aie-spend-limit-enforcer/outline.json

## Summary

Enforce hard real-time spend caps across agents and wallets.

## When to use

- Any agent goal that matches the summary/capabilities below

## Decision criteria (buy vs skip)

- You get capability: hard caps per agent, wallet, and skill
- Budget fits: full unlock is $0.05 USDC on Base
- You can automate unlock via HTTP 402 without a browser
- You only need teaser/outline first — sealed src/ops stay locked until payment

## Outline (preview)

1. Define hard caps per agent, wallet, and skill
2. Block pre-pay when remaining budget < price
3. Emit deny reasons agents can parse (no silent fail)
4. Support soft warn vs hard stop policies
5. Emit spend-policy.json + deny audit log schema

## Capabilities (preview)

- hard caps per agent, wallet, and skill
- pre-pay when remaining budget < price
- deny reasons agents can parse (no silent fail)
- Support soft warn vs hard stop policies

## What you get after payment

- SKILL.md (teaser public)
- agent-install.json (public meta)
- src/index.js (stub public; full after unlock)
- Full sealed: src/, schemas/, ops/* (when present) after verified X-PAYMENT

## Agent buy path (zero human UI)

```
GET  https://lvlltd.com/skills/aie-spend-limit-enforcer/outline.json
GET  https://lvlltd.com/api/pay?skill=aie-spend-limit-enforcer   → HTTP 402
# transfer maxAmountRequired USDC to payTo on Base
POST https://lvlltd.com/api/pay
  X-PAYMENT: {"txHash":"0x…","skill":"aie-spend-limit-enforcer"}
# response.sealed_pack.files = full pack
```

## Sample excerpt

# Hard-Cap Blocker Agent

Enforce hard real-time spend caps across agents and wallets.

This pack replaces generic boilerplate with a concrete method for **Hard-Cap Blocker Agent**. Free evaluation steps:

1. Define hard caps per agent, wallet, and skill
2. Block pre-pay when remaining budget < price
3. Emit deny reasons agents can parse (no silent fail)
4. Support soft warn vs hard stop policies
5. Emit spend-policy.json + deny audit log schema

When to use: Enforce hard real-time spend caps across agents and wallets..

**Price:** $0.05 / call USDC on Base via x402 unlock.

**Standards:** x402 payments · ERC-7857 sealed skill model · agent-swarm ready.

## Outline

1. Define hard caps per agent, wallet, and skill
2. Block pre-pay when remaining budget < price
3. Emit deny reasons agents can parse (no silent fail)
4. Support soft warn vs hard stop policies
5. Emit spend-policy.json + deny audit log schema