Search the web and return ranked results via Tavily — title, URL, snippet, and relevance score. Price: $0.01 USDC per search (paid mode) | Free test: returns fixture data. Optional synthesized answer summarizing results. Use include_domains/exclude_domains for focused research. Per-wallet daily l...
AI agents call x402_web_search to retrieve information from x402 MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Despite operating within a financial payment infrastructure (USDC micropayments on Base network), the x402_web_search tool itself performs only read operations—it searches and retrieves ranked web results without creating, modifying, deleting, or executing code. The financial mechanism is handled by the server wrapper, not by this tool's logic.
From the tool's definition Tool retrieves web search results via Tavily API, returning 'title, URL, snippet, and relevance score' with optional synthesized answer. Core function is querying and retrieving data with no side effects on external systems or data modification.
Attacks that exploit this kind of access
Search the web and return ranked results via Tavily — title, URL, snippet, and relevance score. Price: $0.01 USDC per search (paid mode) | Free test: returns fixture data. Optional synthesized answer summarizing results. Use include_domains/exclude_domains for focused research. Per-wallet daily limit: 50 queries (resets midnight UTC). Without X402_PRIVATE_KEY, only the free test endpoint is available. Returns: query, results array (title, url, snippet, score), optional answer field. It is categorised as a Read tool in the x402 MCP Server MCP Server, which means it retrieves data without modifying state.
Register the x402 MCP Server MCP server in PolicyLayer and add a rule for x402_web_search: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches x402 MCP Server. Nothing to install.
x402_web_search is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the x402_web_search rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for x402_web_search. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
x402_web_search is provided by the x402 MCP Server MCP server (jameswilliamwisdom/x402-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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