Use when web_fetch returns HTTP 402, an API offers a paid tier or micro-toll, another agent charges USDC, or the user asks you to pay, tip or buy. Not for a plain balance or address check (call the wallet tool directly).
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The skill is specifically designed for direct financial operations, giving the agent the ability to move money or execute financial transactions — such as payment processing, cryptocurrency operations, banking integrations, or market order execution.
The skill explicitly provides tools for crypto/blockchain financial execution, specifically managing a Coinbase Smart Wallet on Base, checking USDC balances, signing and paying for resources via the x402 protocol (`pay_for_resource`), and sending USDC to addresses (`send_usdc`). These meet the criteria for Direct Financial Execution.
The skill exposes the agent to untrusted, user-generated content from public third-party sources, creating a risk of indirect prompt injection. This includes browsing arbitrary URLs, reading social media posts or forum comments, and analyzing content from unknown websites.
The workflow consumes arbitrary web page content and HTTP 402 responses via web fetch and pay for resource tools, which involves reading outsider-authored text upon explicit retrieval.
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