Before you start
Use a ChatGPT workspace and plan that currently supports custom MCP servers or connectors. Availability and labels can change by plan, workspace, region, and OpenAI rollout. Check OpenAI's current documentation before relying on a particular menu name.
Official compatibility caveat: OpenAI controls which ChatGPT surfaces can add remote MCP servers. If your account does not show a connector or custom MCP option, use the official Help Center for the current availability instead of assuming the feature is enabled.
Connect the server
- Open ChatGPT settings or the workspace area where connectors and integrations are managed. The exact navigation label varies.
- Choose the option to add a custom connector or remote MCP server, if available.
- Enter this URL exactly:
- Leave authentication fields empty. Zambo's endpoint is zero-auth.
- Save the connection, then enable Zambo for a new or existing conversation when ChatGPT presents the available tools.
Use the product's current on-screen labels rather than relying on an older screenshot or menu path.
Check that it works
Start a conversation and ask ChatGPT to list available Zambo tools, or request a small task that a Zambo tool supports. A completed tool call confirms that the connection is live. If tools do not appear, remove the connection and add the canonical URL again.
Machine detail: MCP clients may begin with a default list; a client requesting the full catalog can receive the live catalog. The client determines how tools are displayed.
Usage and pricing
The free tier includes 20 free calls per metered tool each day with no account. When you need more, the verified Day Pass is $0.99 for 24 hours, paid in USDC on Base through the day_pass_activate tool. The Zambo Pass is $29/month or $290/year; verified $ZAMBO holders pay $19/month. Review current terms and availability on the pricing page.
Quick FAQ
No. The canonical MCP URL is zero-auth; no account or API key is needed for the free tier.
Zambo was built solo by Brennan Zambo and is MIT licensed.