---
skill_id: free-to-paid-bridge
evaluation: free
price_usd_full: 6.99
challenge: https://lvlltd.com/api/pay?skill=free-to-paid-bridge
outline: https://lvlltd.com/skills/free-to-paid-bridge/outline.json
standards: x402, ERC-7857
---

# Free sample — Free-to-Paid Bridge

**Skill ID:** `free-to-paid-bridge`  
**Full unlock:** $6.99 USDC via x402 on Base  
**Challenge:** https://lvlltd.com/api/pay?skill=free-to-paid-bridge  
**Outline JSON:** https://lvlltd.com/skills/free-to-paid-bridge/outline.json

## Summary

Value-gated upgrades from free usage to paid skills without hostage patterns.

## When to use

- Free users never convert and paid users feel few
- You're deciding what to give free vs paid in a skill
- Paywall copy is weak or feels extractive
- You need freemium packaging for agent tools

## Decision criteria (buy vs skip)

- You need this when: Free users never convert and paid users feel few
- You get capability: Execute Free-to-Paid Bridge workflows end-to-end
- Budget fits: full unlock is $6.99 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. 1. Clarify goal and constraints for Free-to-Paid Bridge
2. 2. Gather inputs (data, context, prior artifacts)
3. 3. Apply skill method step-by-step
4. 4. Produce structured outputs and quality check
5. 5. Hand off next owner + done_when criteria

## Capabilities (preview)

- Execute Free-to-Paid Bridge workflows end-to-end
- Value-gated upgrades from free usage to paid skills without hostage patterns
- Structure decisions with explicit assumptions
- Produce machine- and human-readable outputs
- Funnel design
- Conversion experiment framing

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

## Sample excerpt

# Free-to-Paid Bridge
**ID:** `free-to-paid-bridge`  
**Category:** Growth  
**Price:** $6.99 USDC  
**Tags:** freemium, upgrade, activation

## Summary

Value-gated upgrades from free usage to paid skills without hostage patterns.

## Detailed description

Design value-gated upgrades from free samples to paid skills without hostage tactics. Chooses the paywall moment, messaging, and free-user quality filters so conversion feels fair.

This skill is sold as a **sealed capability pack** for humans and agent swarms. Agents challenge with HTTP 402, settle USDC on Base, then unlock the full payload with X-PAYMENT.

**When to use:**
- Free users never convert and paid users feel few
- You're deciding what to give free vs paid in a skill
- Paywall copy is weak or feels extractive
- You need freemium packaging for agent tools

**Price:** $6.99 USDC on Base via x402 unlock.

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

## Outline

- 1. Clarify goal and constraints for Free-to-Paid Bridge
- 2. Gather inputs (data, context, prior artifacts)
- 3. Apply skill method step-by-step
- 4. Produce structured outputs and quality check
- 5. Hand off next owner + done_when criteria

## Capabilities

- Execute Free-to-Paid Bridge workflows end-to-end
- Value-gated upgrades from free usage to paid skills without hostage patterns
- Structure decisions with explicit assumptions
- Produce machine- and human-readable outputs
- Funnel design
- Conversion experiment framing

## Artifact outputs

- Free-to-Paid Bridge primary deliverable document
- Action checklist with owners
- Assumptions & risks note
- Campaign brief
- Experiment log entry
- x402 unlock receipt metadata (when purchased)

## Purchase (x402)

```
GET https://lvlltd.com/api/pay?skill=free-to-paid-bridge  → HTTP 402
POST https://lvlltd.com/api/pay  X-PAYMENT: {"txHash","skill":"free-to-paid-bridge"}
```

Human: https://lvlltd.com/?buy=free-to-paid-bridge