x402 Preflight MCP MCP server

An official MCP server provided by Chiko Corp for x402 API developers to inspect and validate payment configurations, discovery metadata, and compatibility signals of live endpoints before autonomous agents spend USDC. It performs read-only checks and offers paid technical audits and diagnostic reports.

Endpoint and access

No sign-in: your client connects and lists tools immediately, with no account or key.

No sign-inEndpoint checked 2026-10-05Operated by Chiko Corp

MCP endpoint (Streamable HTTP)

https://x402.chikocorp.com/mcp

Vendor documentation

What you can do with it

Inspect live x402 endpoint payment configuration
Validate discovery metadata and schemas
Run automated diagnostic reports for integration issues
Check compatibility signals for browser and agent clients

Tools advertised by the last live check:

inspect_x402_endpoint
audit_x402_endpoint
order_x402_remediation

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers a Streamable HTTP server. Use --scope project to write .mcp.json for the repo.

Claude Code configuration

claude mcp add --transport http x402-preflight-mcp https://x402.chikocorp.com/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).

Codex configuration

codex mcp add x402-preflight-mcp --url https://x402.chikocorp.com/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable x402-preflight-mcp in your MCP settings.

Cursor configuration

{
  "mcpServers": {
    "x402-preflight-mcp": {
      "url": "https://x402.chikocorp.com/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure). The type must be streamableHttp for a remote HTTP server.

Cline configuration

{
  "mcpServers": {
    "x402-preflight-mcp": {
      "type": "streamableHttp",
      "url": "https://x402.chikocorp.com/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start x402-preflight-mcp and inspect its tools.

VS Code configuration

{
  "servers": {
    "x402-preflight-mcp": {
      "type": "http",
      "url": "https://x402.chikocorp.com/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.

Gemini CLI configuration

gemini mcp add --transport http x402-preflight-mcp https://x402.chikocorp.com/mcp

Claude Desktop

Merge this into claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\), then restart Claude Desktop.

Claude Desktop configuration

{
  "mcpServers": {
    "x402-preflight-mcp": {
      "url": "https://x402.chikocorp.com/mcp"
    }
  }
}

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.

Windsurf configuration

{
  "mcpServers": {
    "x402-preflight-mcp": {
      "serverUrl": "https://x402.chikocorp.com/mcp"
    }
  }
}

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