INDIVIDUAL MCP TOOL

preflight_batch

Trust-check up to 25 x402 seller URLs in one request.

x402check.devnone authenticationAvailability not checked

LIVE ENDPOINT

https://x402check.dev/mcp

No auth detected

Connect to this endpoint to inspect the live schema for preflight_batch and invoke it with your own arguments.

{}

Inferred read-only · medium confidence · heuristic, not a guarantee.

No write-capable action terms were found; this is not proof that invocation has no side effects.

CONNECT WITH APPROVAL

Review this server and its permissions before adding it. Secret placeholders must be set locally.

Codex

~/.codex/config.toml

[mcp_servers.x402check]
url = "https://x402check.dev/mcp"
enabled = true

Claude Code

.mcp.json

{
  "mcpServers": {
    "x402check": {
      "type": "http",
      "url": "https://x402check.dev/mcp"
    }
  }
}

Claude Desktop

Settings → Connectors → Add custom connector

Name: x402check
Remote MCP URL: https://x402check.dev/mcp

Add this remote URL as a custom connector in Claude Desktop. Availability depends on the user plan and workspace policy.

Cursor

.cursor/mcp.json

{
  "mcpServers": {
    "x402check": {
      "url": "https://x402check.dev/mcp"
    }
  }
}

Visual Studio Code

.vscode/mcp.json

Add to Visual Studio Code

{
  "servers": {
    "x402check": {
      "type": "http",
      "url": "https://x402check.dev/mcp"
    }
  }
}

Generic MCP

Client-specific MCP configuration

{
  "name": "x402check",
  "transport": "streamable-http",
  "url": "https://x402check.dev/mcp"
}

MCP Inspector

Run the official MCP Inspector locally and enter the indexed Streamable HTTP endpoint.

preflight_check — Mandatory trust preflight before paying any x402 endpoint.
verify_payto — Verify the payTo / receiving wallet an x402 seller demands before you sign.
compare_tools — Compare several x402 tools before choosing which to pay.