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Use an account and workspace that permit custom MCP servers. ChatGPT’s available integration controls depend on account access and workspace policy.
1

Open Plugins

Go to Plugins in ChatGPT, select +, then Add custom MCP server.
2

Enter the server details

Name it Melso, add a description, and set the MCP server URL to https://melso.ai/api/mcp.
3

Configure OAuth

Use the server’s OAuth authentication. Sign in to Melso, choose a company, and review the requested access. Continue through ChatGPT’s integration review.
4

Create and review

Select Create as plugin, inspect the discovered tools, and finish setup. In a new conversation, use the @ picker to select the integration.
These steps follow OpenAI’s current custom MCP connection guide. If your workspace does not show this flow, ask its administrator whether custom integrations are enabled. Follow Try a first read: “Read my Melso company context without changing anything.” If the catalog changes, refresh the integration’s metadata from Plugins. Melso approvals that require a person still happen in the signed-in Melso app.