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Installation & setup

Connect the MCP server to your AI assistant. Access uses an OAuth 2.1 token issued by the Hello Retail authorization server. Supported clients open the login flow automatically on first use.

Open Settings → Connectors → Add custom connector, give it a name (for example Hello Retail), paste the server URL below, and click Add. Sign in when the OAuth login opens.

https://core.helloretail.com/mcp

Run this in your terminal. On first use it opens a browser for OAuth login; the token is cached automatically.

claude mcp add --transport http hello-retail https://core.helloretail.com/mcp

Open a Project → Settings → Integrations → Add MCP server. Paste this URL and sign in when prompted.

https://core.helloretail.com/mcp

Add this to ~/.codex/config.toml, then run codex mcp login hello-retail to complete the OAuth sign-in.

[mcp_servers.hello-retail]
url = "https://core.helloretail.com/mcp"

Requires Developer Mode and a paid plan (Plus, Pro, Team, Enterprise, or Edu; not available on Free). Open Settings → Connectors → Advanced, enable Developer mode, then Create and paste this URL as the Connector URL. Sign in when prompted.

https://core.helloretail.com/mcp

Tips & tricks

Claude Code caches the token after the first browser login. Re-run the add command only to update the URL.

Re-add the Hello Retail MCP server in Claude Code using an updated server URL.

On Claude Cowork, add the server as a custom connector under Settings → Connectors — no config file or restart needed.

Walk me through adding the Hello Retail MCP server as a custom connector in Claude Cowork.

ChatGPT custom connectors require Developer Mode and a paid plan (Plus and up). They are not available on Free.

How do I enable Developer Mode in ChatGPT so I can add a custom MCP connector?

If a tool call returns 401, the token has expired. Trigger any tool again to re-authenticate.

A Hello Retail tool returned 401 — run it again so I can re-authenticate.