PrompTessor

MCP integration

Connect ChatGPT to PrompTessor MCP

Configure the PrompTessor MCP connector in ChatGPT web and complete OAuth authorization.

Verified against the implementation ·

ChatGPT web

No API key is needed. ChatGPT sends you to PrompTessor to sign in and approve the requested permissions, then returns you to ChatGPT with the connection ready to use.

Open chatgpt.com/plugins and add the connection using the values below.

  1. 1

    Enable Developer mode

    In ChatGPT, open Settings > Security and login, then turn on Developer mode. Availability can depend on your account and workspace policy.

  2. 2

    Open Plugins

    Go to chatgpt.com/plugins and select the plus button to add a connection.

  3. 3

    Enter the connection details

    Use PrompTessor as the name, optionally add a short description, and paste the Server URL shown below.

Name
PrompTessor
Server URL
https://mcp.promptessor.com/mcp
Authentication
OAuth
PrompTessor icon

PrompTessor icon

Optional 48 × 48 PNG icon for the ChatGPT plugin configuration.

Download PNG
Example ChatGPT configuration. Use Server URL and OAuth as shown, then review the warning before creating the connection.
  1. 4

    Create and authorize

    Select Create connection. Sign in to PrompTessor, review the requested scopes, and approve access. ChatGPT then returns to the connection and discovers its tools.

Select Sign in with PrompTessor to continue to the secure PrompTessor authorization flow.
Review the requested scopes, then select Allow access to authorize ChatGPT.

If no app actions are available yet

Open the PrompTessor plugin details and select Refresh in the Information section. Wait for discovery to finish, then reopen the plugin if necessary.

If Actions says “No app actions available yet,” select Refresh to run MCP tool discovery again.
A populated Actions section confirms that ChatGPT discovered the PrompTessor MCP tools successfully.
  1. 5

    Enable it in a chat

    Start a new conversation, open the tools menu, and add PrompTessor to the conversation.

  2. 6

    Verify the connection

    Ask “Check my PrompTessor usage.” ChatGPT should select get_usage and return your current credits and API limits.

If the plus button is unavailable

Developer mode or custom MCP connections may be disabled for your account or workspace. Ask the workspace administrator to allow them, or use Codex, Claude, Cursor, VS Code, or another supported MCP client.

After the plugin is published

Developer mode is for testing a direct MCP connection. Once the PrompTessor plugin is approved and listed, regular users install it from ChatGPT Plugins and enable its tools without creating the connection manually.

Official OpenAI connection guideCurrent developer-mode and MCP connection flow.