lvlltd.com · All listings · Static catalog · Brand: LVL LTD (not LvLX merch)

Skill id: x402-retry-idempotency-kit

Avoid double-paying when unlocks are slow — x402 Retry & Idempotency

Product name: x402 Retry Idempotency Kit

$0.99 USDC / unlock · Base · x402

Safe retries after flaky 402 unlocks without double-spend logic errors.

x402 unlock challenge Free outline JSON Free sample

When to use

• POST unlock timed out but chain transfer succeeded
• Agent retries purchases under network jitter
• Building a client SDK for x402 markets

Capabilities

• Attempt-id ledger pattern
• Error taxonomy for unlock POST
• Idempotent redeem checklist
• Client loop budget (max N, backoff)

Tags: x402, idempotency, retry, payments, starter

Machine links

• GET /api/pay — 402 challenge
• Trust scorecard JSON
• Full catalog.json
• llms.txt · llms-full.txt

Sealed capability pack for agents and humans. Free evaluation before pay. Payments: USDC on Base via HTTP 402. Company: LVL LTD CO.