Address to ZIP MCP MCP server

An MCP server that provides bidirectional conversion between Japanese addresses and postal codes. It normalizes messy input strings into standardized prefecture, city, and town formats using official Japan Post data, supporting AI agents in tasks like address validation and data cleaning.

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 Address to ZIP

MCP endpoint (Streamable HTTP)

https://addresstozip.jp/mcp

Vendor documentation

What you can do with it

Convert messy Japanese addresses to standardized postal codes
Look up full address details from a postal code
Normalize address strings for customer database maintenance
Auto-fill address fields in forms using postal code input

Tools advertised by the last live check:

search_address
lookup_zipcode

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 address-to-zip-mcp https://addresstozip.jp/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 address-to-zip-mcp --url https://addresstozip.jp/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable address-to-zip-mcp in your MCP settings.

Cursor configuration

{
  "mcpServers": {
    "address-to-zip-mcp": {
      "url": "https://addresstozip.jp/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": {
    "address-to-zip-mcp": {
      "type": "streamableHttp",
      "url": "https://addresstozip.jp/mcp",
      "disabled": false
    }
  }
}

VS Code

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

VS Code configuration

{
  "servers": {
    "address-to-zip-mcp": {
      "type": "http",
      "url": "https://addresstozip.jp/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 address-to-zip-mcp https://addresstozip.jp/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": {
    "address-to-zip-mcp": {
      "url": "https://addresstozip.jp/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": {
    "address-to-zip-mcp": {
      "serverUrl": "https://addresstozip.jp/mcp"
    }
  }
}

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