Search Results

Which assistant do you use?

1. Open claude.ai in a web browser and sign in.
2. Go to Customize → Connectors, click + Add, then Add custom connector.
3. Name it ZIP Codes and paste this server URL: https://mcp.zip-codes.com/mcp Copy Choose No sign in, then add it.
4. Start a new chat, click + and turn on ZIP Codes.

The free plan allows one custom connector. Once it's added on the web, it also works in the Claude desktop and phone apps.

1. In a web browser, open chatgpt.com/plugins and sign in. Click +, then Add custom MCP server.
2. Name it ZIP Codes and paste this server URL: https://mcp.zip-codes.com/mcp Copy Choose No authentication, then create it as a plugin.
3. Install the plugin and accept the warning.
4. Start a new chat and type @ZIP Codes before your question.

Custom servers need a paid ChatGPT plan, and ChatGPT changes these menus often. If yours look different, see our setup page.

Now ask your assistant:

This sample answers in full without a key. For other places, some details come back as asterisks: those need a free API key, which you can add later (see our setup page).