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Connecting to ChatGPT

You can connect your HasMCP servers to ChatGPT by creating a Custom GPT Apps. This allows ChatGPT to interact with your tools and APIs using the OpenAPI specification provided by HasMCP.

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Setup Instructions

For ChatGPT Apps, HasMCP allows you to pass your access key directly in the URL using a query string, simplifying the configuration process.
1

Generate a Token

In your HasMCP dashboard, navigate to your MCP Server and click Generate Token to create a secure access key.
2

Construct the MCP URL

ChatGPT requires a base URL for the Apps. Append your token to your server’s endpoint using the token query parameter.On top right of the screen click on Settings:
Settings » Apps » Advanced settings » Create app » Enter details below » Create
  • Name: myServer
  • Description: Your description
  • MCP Server URL: https://app.hasmcp.com/mcp/<SERVER_ID>?token=<YOUR_ACCESS_TOKEN>
  • Authentication: Choose No Auth since we passed the token as query string already.
Click the Create button at the bottom of the modal window to activate the MCP Server.

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Why use Query Strings?

While standard MCP clients use the x-hasmcp-key header, using the ?token=<> query string is ideal for ChatGPT Actions because:
  • Compatibility: It bypasses potential header-stripping issues in the ChatGPT Action interface.
  • Simplicity: You do not need to configure an “API Key” in the ChatGPT authentication settings.
  • Security: The token is still validated by HasMCP before any tools are executed.

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Troubleshooting

Ensure there are no spaces or extra characters in the ?token= value.
Ensure the SERVER_ID in the URL matches the one provided in your dashboard.