Claude

  1. claude.ai/customize/connectors
  2. + Add › Add custom connector
  3. Name: Maps Census, then the address
  4. “No sign in”, then Add

ChatGPT ChatGPT company or school accounts (Business, Enterprise, Edu)

  1. chatgpt.com/plugins › + › Add custom MCP server
  2. Name: Maps Census, then the address
  3. “No authentication” › Create as a plugin
  4. Install the plugin

In a Business workspace, only admins and owners can add a custom MCP server.

Then ask, for example

“How many dentists in California have a website, by county?”
“What share of restaurants in Chicago link to Instagram on their website?”
“How are hotel ratings spread in New York?”

Limits

Free, no account. Counts only: never a name or a contact.

Business names and contacts in Claude or ChatGPT need a Scrap.io account with API and MCP searches. See pricing