---
skill_id: aie-cache-retrieval-billing
evaluation: free
price_usd_full: 0.03
challenge: https://lvlltd.com/api/pay?skill=aie-cache-retrieval-billing
outline: https://lvlltd.com/skills/aie-cache-retrieval-billing/outline.json
standards: x402, ERC-7857
---

# Free sample — Cache Pay-Per-Retrieval Agent

**Skill ID:** `aie-cache-retrieval-billing`  
**Full unlock:** $0.03 USDC via x402 on Base  
**Challenge:** https://lvlltd.com/api/pay?skill=aie-cache-retrieval-billing  
**Outline JSON:** https://lvlltd.com/skills/aie-cache-retrieval-billing/outline.json

## Summary

Bill cache hits/misses with pay-per-retrieval micropayments.

## When to use

- Any agent goal that matches the summary/capabilities below

## Decision criteria (buy vs skip)

- You get capability: cache hit vs miss with stable cache keys
- Budget fits: full unlock is $0.03 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. Classify cache hit vs miss with stable cache keys
2. Price hits cheaper than full retrieval/inference
3. Settle micropay only on billable retrievals
4. Prevent cache poisoning from unpaid callers
5. Emit cache-bill policy + sample receipts

## Capabilities (preview)

- cache hit vs miss with stable cache keys
- Price hits cheaper than full retrieval/inference
- micropay only on billable retrievals
- cache poisoning from unpaid callers

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

## Sample excerpt

# Cache Pay-Per-Retrieval Agent

Bill cache hits/misses with pay-per-retrieval micropayments.

This pack replaces generic boilerplate with a concrete method for **Cache Pay-Per-Retrieval Agent**. Free evaluation steps:

1. Classify cache hit vs miss with stable cache keys
2. Price hits cheaper than full retrieval/inference
3. Settle micropay only on billable retrievals
4. Prevent cache poisoning from unpaid callers
5. Emit cache-bill policy + sample receipts

When to use: Bill cache hits/misses with pay-per-retrieval micropayments..

**Price:** $0.03 / call USDC on Base via x402 unlock.

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

## Outline

1. Classify cache hit vs miss with stable cache keys
2. Price hits cheaper than full retrieval/inference
3. Settle micropay only on billable retrievals
4. Prevent cache poisoning from unpaid callers
5. Emit cache-bill policy + sample receipts