Ask your AI assistant about these ZIP Codes. Connect Claude or ChatGPT in a few steps.Try a Question
Key: indicates PO Box ZIP Code, indicates Unique/Business ZIP Code, and indicates a Military ZIP Code.
indicates records that cross into the county you searched for, but their 'primary' county is different.
Ask your AI assistant about these ZIP Codes
Connect Claude or ChatGPT to our ZIP Code data, then ask questions in plain English. No sign-up with us needed.
Once you're connected, try this:
“What county is ZIP Code 60601 in, which area codes does it use, and what is its median household income?”
This sample ZIP Code answers in full without a key. For other ZIP Codes, some details come back as asterisks until you add a free API key.
New to this? We'll walk you through it, one step at a time.
Go to Customize → Connectors, click + Add, then Add custom connector.
Name it ZIP Codes and paste this server URL:
https://mcp.zip-codes.com/mcp
Choose No sign in, then add it.
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.
In a web browser, open chatgpt.com/plugins and sign in. Click +, then Add custom MCP server.
Name it ZIP Codes and paste this server URL:
https://mcp.zip-codes.com/mcp
Choose No authentication, then create it as a plugin.
Install the plugin and accept the warning.
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:
“What county is ZIP Code 60601 in, which area codes does it use, and what is its median household income?”
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).
