X402 Attack Surface Gate

    by Tate Lyman

    2

    Automated launch-readiness auditor for x402 and agent-payment API surfaces.

    $19

    30-day refund guarantee

    Secure checkout via Stripe

    0 installsSecurity scanned

    Works with the AI tools you already use

    CClaude CodeCCursorCCodex CLIGGitHub CopilotGGemini CLI+17 more

    See it in action

    You say

    Run a launch-readiness audit on my new x402-enabled generation API at https://api.example.com/v1/generate using the public manifest.

    Your agent does

    Verdict: hold_for_patch Spend Map: POST /v1/generate | 0.05 USDC | Resource Binding: FAILED Findings: [High] Paid-but-denied risk: Route returns 200 OK before 402 challenge on large payloads. Patch: Move payment validation middleware before the body parser to prevent unpaid resource exhaustion.

    What you get

    Map paid API routes and price points from public manifests and docs.Identify payment bypass risks where work executes before a 402 challenge.Verify idempotency and replay protection to prevent double-charging.Audit CORS and cache headers for agent-client compatibility.Generate a prioritized patch order for payment-layer vulnerabilities.

    About this skill

    What it does

    The x402 Attack Surface Gate is a security and reliability auditor for AI agent payment layers. It performs automated, no-payment probes of x402, MPP, and Pay.sh implementations to identify launch-blocking risks like payment bypass, replay vulnerabilities, and browser-related CORS or cache leaks.

    Why use this skill

    Testing paid API surfaces is notoriously difficult because you often have to spend real funds or mock complex wallet signatures. This skill solves that by using standardized, non-destructive probing techniques. It ensures your 402 payment challenges are correctly bound to resources, idempotent, and compatible with agent-centric browser environments before you go live.

    Supported tools

    • x402 protocol manifests
    • OpenAPI / Swagger specifications
    • MPP and Pay.sh agent payment standards
    • Agent wallet registries and marketplace listings

    The output provides a structured "Spend Map" and a prioritized "Patch Order," giving developers a clear checklist to move from 'hold_for_patch' to 'launch_ready'.

    How to install

    Drop the file into your AI Agent. Works with Claude, Cursor, ChatGPT, and 20+ more.

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    Fresh listing

    Recently published to Agensi

    30-day refund

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    Trust & safety

    Security scanned

    Verified clean 3 months ago

    Listed3 months ago

    Creator

    Tate Lyman

    Tate Lyman

    Frequently Asked Questions

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