Quack AI(@QuackAI_AI):An x402 seller can accept your payment and still fail to deliver Most payment clients report that as a plain failure. Your agent reads failure, retries, and pays twice q402-mcp tells you exactly what happened: → settled, not delivered: txHash, recipient, amount → can't confirm settlement: it says unknown, loudly → rejected before settlement: safe to retry Every outcome carries a do-not-retry signal when money may have moved npx -y @quackai/q402-mcp

Quack AI

@QuackAI_AI

Building Q402. The first unified sign-to-pay execution and governance layer for the Agent Economy. Backed by @animocabrands @SkylandVC @KeneticCapital

加入 July 2022

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Quack AI@QuackAI_AI

2026.08.28 12:28

An x402 seller can accept your payment and still fail to deliver Most payment clients report that as a plain failure. Your agent reads failure, retries, and pays twice q402-mcp tells you exactly what happened: → settled, not delivered: txHash, recipient, amount → can't confirm settlement: it says unknown, loudly → rejected before settlement: safe to retry Every outcome carries a do-not-retry signal when money may have moved npx -y @quackai/q402-mcp