---
skill_id: gas-fee-forecaster-base
evaluation: free
price_usd_full: 0.49
challenge: https://lvlltd.com/api/pay?skill=gas-fee-forecaster-base
outline: https://lvlltd.com/skills/gas-fee-forecaster-base/outline.json
standards: x402, ERC-7857
---

# Free sample — Gas Fee Forecaster (Base)

**Skill ID:** `gas-fee-forecaster-base`  
**Full unlock:** $0.49 USDC via x402 on Base  
**Challenge:** https://lvlltd.com/api/pay?skill=gas-fee-forecaster-base  
**Outline JSON:** https://lvlltd.com/skills/gas-fee-forecaster-base/outline.json

## Summary

Estimate Base gas spend for a month of unlocks and agent txs.

## When to use

- Planning a week of agent x402 purchases
- Treasury wants a gas line-item before campaign spend
- Failed unlocks after underfunded Base ETH

## Decision criteria (buy vs skip)

- You need this when: Planning a week of agent x402 purchases
- You get capability: Unlock-volume → gas unit estimator
- Budget fits: full unlock is $0.49 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. Log expected unlock count and avg gas units per pay path
2. Pull recent Base baseFee/priorityFee samples or paste range
3. Compute weekly and monthly ETH gas envelope with 20% buffer
4. Map envelope to USDC opportunity cost at current ETH/USD
5. Emit gas-budget.json with kill-switch if ETH balance < 2× weekly envelope

## Capabilities (preview)

- Unlock-volume → gas unit estimator
- Base fee range → ETH cost table
- ETH balance vs envelope alert thresholds
- USDC opportunity-cost note for finance agents

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

## Sample excerpt

# Gas Fee Forecaster (Base)

Agents fail mid-purchase more often from empty Base ETH than from USDC shortage. This pack is a practical gas envelope for x402 markets on Base: you feed expected unlocks (and optional redeem retries), a recent baseFee range, and wallet ETH balance. It outputs a weekly and monthly ETH budget with buffer, a simple tx-mix table, and a kill-switch rule so orchestrators stop new challenges when ETH would drop below two weeks of burn.

It is not a live mempool oracle. It is the spreadsheet logic operators re-implement every launch week, packaged so a finance or ops agent can run it before a canary or a Boardy networking spree.

When to use: pre-campaign treasury checks, multi-agent fleets that unlock many $0.05–$5 skills, or after a string of “insufficient funds for gas” errors.

**Price:** $0.49 USDC on Base via x402 unlock.

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