// SCAN REPORT

X402 Discovery

7 tools. 4 can modify or destroy data without limits.

4 destructive tools with no built-in limits. Policy required.

Last updated: 3 Jul 2026

4 can modify or destroy data

3 read-only

7 tools total

Community server · catalogue entry verified 03/07/2026

How to control X402 Discovery ↓

TOOL MAP

What X402 Discovery exposes to your agents

Read (3) Write / Execute (0) Destructive / Financial (4)

Running more than one server? Check your whole stack →

MOST DANGEROUS TOOLS

Critical Risk

The most dangerous X402 Discovery tools

Financial · Critical register_tool_for_payment The tool name strongly implies registering something for payment processing within an x402/USDC micropayment system. Financial · Critical x402_register The server context is explicitly financial — USDC micropayments on Base blockchain. Financial · High x402_browse The server's core function is financial — autonomous USDC micropayments on Base. Financial · High x402_discover The x402 protocol is explicitly a payment protocol for micropayments in USDC.

4 of X402 Discovery's 7 tools can modify, destroy, or commit something on every call — and an agent calls them with no built-in limits.

POLICY

How to control X402 Discovery

PolicyLayer is an MCP gateway — it sits between your AI agents and X402 Discovery, and nothing reaches the server without passing your rules. These are the rules we recommend:

Block financial tools by default

{
  "register_tool_for_payment": {
    "deny_if": [
      {
        "conditions": [],
        "on_deny": "Requires human approval."
      }
    ]
  }
}

Financial tools should be explicitly enabled per use case, not open by default.

Cap read operations

{
  "gateway_stats": {
    "limits": [
      {
        "counter": "gateway_stats_per_minute",
        "window": "minute",
        "max": 60,
        "scope": "grant"
      }
    ]
  }
}

Controls API costs and prevents retry loops from exhausting upstream rate limits.

Create a free account and register X402 Discovery — nothing to install.
Add these rules — paste them, or build them visually. Tune the limits to your setup.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

ENFORCE POLICY ON X402 DISCOVERY →

Instant setup, no code required.

FULL CATALOGUE

All 7 X402 Discovery tools

FINANCIAL 4 tools

Financial register_tool_for_payment register_tool_for_payment Financial x402_browse x402_browse Financial x402_discover x402_discover Financial x402_register x402_register

READ 3 tools

Read gateway_stats Return gateway statistics and revenue tracking. Read list_gated_tools List all tools available through the payment gateway with their prices. Read x402_health Check real-time health status of any registered x402 service. Free, no payment required.

FAQ

Questions about X402 Discovery

Can an AI agent move money through the X402 Discovery MCP server? +

Yes. The X402 Discovery server exposes 4 financial tools including register_tool_for_payment, x402_browse, x402_discover. Without a policy, an autonomous agent can call these with no spend caps, no rate limits, and no approval flow. PolicyLayer lets you block financial tools by default, require human approval, or set per-tool rate limits — enforced on every call.

How many tools does the X402 Discovery MCP server expose? +

7 tools across 2 categories: Read, Write. 3 are read-only. 4 can modify, create, or delete data.

How do I enforce a policy on X402 Discovery? +

Register the X402 Discovery MCP server in PolicyLayer, apply the suggested rules above (adjust the limits to your use case), and point your AI client at the PolicyLayer proxy URL instead of the server directly. Your agents keep the same tools; PolicyLayer evaluates every call against policy before it executes. Nothing to install, live in minutes.

Enforce policy on every X402 Discovery tool call.

Deterministic rules across all 7 X402 Discovery tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

ENFORCE POLICY ON X402 DISCOVERY →

Instant setup, no code required.

7 X402 Discovery tools catalogued and risk-classified — across an index of 43,000+ MCP servers.