ClawHub
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Security audit

x402 Agent Marketplace

Security checks for vulnerabilities and agentic risk

Overview

This skill openly focuses on crypto payments, but it directs users to send SOL to a fixed wallet with limited verification, safety, or implementation details.

Review this carefully before installing or using it. Only send SOL if you can independently verify the recipient wallet, expected price, endpoint, and operator identity; assume payments are irreversible and that wallet and transaction identifiers may reveal activity. The submitted package also lacks the server and dependency files it tells users to run, so its actual marketplace behavior cannot be verified from these artifacts.

A.I.G

Vulnerability Patterns
  • Skill Instruction HijackingAlters the agent's session goals or safety constraints when the skill loads
  • Agent Memory PoisoningWrites attacker-controlled rules into memory that affect later sessions
  • Remote Payload Retrieval and ExecutionFetches external code whose behavior can change after review
  • Embedded Malicious CodeShips malicious scripts inside the skill and executes them locally
  • Unauthorized Access and Privilege EscalationObtains permissions beyond the task's legitimate needs

SkillSpector

Vulnerability Patterns
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
Findings (1)

Missing User Warnings

Medium
Confidence
90% confidence
Finding
The skill explicitly instructs users to send cryptocurrency to a hardcoded wallet address and then transmit wallet/transaction identifiers in an HTTP header, but it provides no warnings about irreversible payments, privacy exposure, phishing risk, or how payment verification is secured. In a marketplace skill centered on micro-payments, this omission materially increases the chance of user fund loss, misuse of transaction data, or fraudulent payment handling.

Static analysis

No suspicious patterns detected.