x402_discover
Search for x402 paid API endpoints that can answer a question or provide data. Discovery powered by Decixa (5,500+ verified x402 endpoints) with local registry fallback. Searches across the entire x402 ecosystem — not just Alderpost endpoints. Local registry includes premium endpoints backed by V...
This record as markdown: /tools/8randonpickart5-x402-buyer-mcp/x402-discover.md
What x402_discover does on X402 Buyer
AI agents call x402_discover to retrieve information from X402 Buyer without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why x402_discover is rated Low
This tool retrieves information about available paid APIs without creating, modifying, or deleting data, and without executing arbitrary code. It is purely a discovery/search mechanism. While the broader system involves financial transactions (via AgentCash payments mentioned in server description), this specific tool only reads data about available endpoints.
From the tool's definition Tool performs search and discovery functionality across API endpoints: 'Search for x402 paid API endpoints' and 'Searches across the entire x402 ecosystem.' The description emphasizes querying and indexing ('Decixa index', 'local registry') with no mention of…
Risk signalsBulk/mass operation — affects multiple targets
Attacks that exploit this kind of access
The rule that runs x402_discover safely
PolicyLayer is an MCP gateway: it sits between your AI agents and X402 Buyer, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For x402_discover, this is the rule to start with:
x402_discover is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect X402 Buyer, apply this rule, and every x402_discover call is checked against it from then on.
Questions about x402_discover
Search for x402 paid API endpoints that can answer a question or provide data. Discovery powered by Decixa (5,500+ verified x402 endpoints) with local registry fallback. Searches across the entire x402 ecosystem — not just Alderpost endpoints. Local registry includes premium endpoints backed by VirusTotal, People Data Labs, Hunter.io, AbuseIPDB, Qualys SSL Labs, NIH RxNorm, US Census Bureau, OpenWeather, The Odds API. Categories: security, company/business, threat intelligence, sales/leads, compliance, health/drug, property/location, sports, and any x402 capability indexed by Decixa. Examples: - query. It is categorised as a Read tool in the X402 Buyer MCP Server, which means it retrieves data without modifying state.
Register the X402 Buyer MCP server in PolicyLayer and add a rule for x402_discover: 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 Buyer. Nothing to install.
x402_discover 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_discover 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_discover. 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_discover is provided by the X402 Buyer MCP server (8randonpickart5/x402-buyer-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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