---
skill_id: agent-credential-vault-pattern
evaluation: free
price_usd_full: 5.99
challenge: https://lvlltd.com/api/pay?skill=agent-credential-vault-pattern
outline: https://lvlltd.com/skills/agent-credential-vault-pattern/outline.json
standards: x402, ERC-7857
---

# Free sample — Agent Credential Vault Pattern

**Skill ID:** `agent-credential-vault-pattern`  
**Full unlock:** $5.99 USDC via x402 on Base  
**Challenge:** https://lvlltd.com/api/pay?skill=agent-credential-vault-pattern  
**Outline JSON:** https://lvlltd.com/skills/agent-credential-vault-pattern/outline.json

## Summary

Least-privilege secret storage and rotation for agents holding API keys and wallets.

## When to use

- Agents need API keys but must not embed them in prompts
- Rotating keys after a suspected leak
- Multi-agent fleets sharing providers with different scopes

## Decision criteria (buy vs skip)

- You need this when: Agents need API keys but must not embed them in prompts
- You get capability: Scope map per tool
- Budget fits: full unlock is $5.99 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. Map each tool to minimum secret scopes
2. Store secrets in vault/KMS; inject at runtime only
3. Set TTL and rotation calendar; dual-control for prod wallets
4. Scrub traces/logs for secret patterns before export
5. Emit vault-map.json + rotation-runbook.md

## Capabilities (preview)

- Scope map per tool
- Runtime injection pattern
- Rotation calendar + dual-control
- Log scrub checklist

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

## Sample excerpt

# Agent Credential Vault Pattern

Agents that paste keys into prompts will leak. This pattern maps tools to minimum scopes, injects at runtime from a vault, rotates on a calendar, and scrubs traces. Wallet keys get dual-control notes. Practical for small teams without enterprise PAM yet.

When to use: any agent with paid APIs or chain keys.

**Price:** $5.99 USDC on Base via x402 unlock.

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

Operator notes for Agent Credential Vault Pattern: treat this as a capability pack you wire into real tools—not a certification or hosted SaaS. Pair it with free evaluation at /skills/agent-credential-vault-pattern/outline.json before paying. Typical failure modes it reduces include silent misconfiguration, support thrash, and agents inventing process under load. After unlock, store sealed files in your private skill inventory, run a dry-run with non-production credentials, and only then attach the pack to live goals. Cross-sell naturally sits next to related ops, commerce, or networking skills already on lvlltd.com so agents can compose a ladder instead of a one-off purchase.