OpenGen
HOSTED ASSISTANT

Create with ChatGPT.

Add a custom MCP plugin and authorize a paying workspace in your browser.

Open your workspace ↗Create in browser →
Hosted MCP with OAuth

A few steps to get connected.

  1. On ChatGPT web, open Plugins, select the plus button and Add custom MCP server. Workspace permissions can restrict this option.
  2. Name it OpenGen, enter your configured gateway’s /mcp URL and select OAuth. Use dynamic client registration (DCR); OpenGen does not advertise Client ID Metadata Documents.
  3. Review the plugin, install it and complete OpenGen’s workspace consent. Invoke the installed plugin with @ in a new conversation.
Endpoint format · use your configured gateway
https://opengen.dev/mcp

Instructions based on Official OpenAI documentation ↗, reviewed 2026-11-03. Client interfaces and permissions can change.

Prefer a shell workflow? Use OpenGen’s CLI and browser login →

YOU CHOOSE THE WORKSPACE

Review consent

Check the app name, callback destination, permissions and paying workspace. Read allows discovery; generate permits billable jobs within your workspace’s rules. Denying consent grants no access.

Start with discovery

Ask for catalog search, inspect a model and request a quote. Check availability and the spending ceiling before generation. Your new personal workspace starts with zero managed credit.

Stay in control

Manage connected apps and revoke their authorizations in your workspace. Keep API keys separate for each application. Signing out of the website does not revoke an agent’s grant.

If setup stops halfway

The browser sign-in is unavailable

Your deployment must have sign-in configured. Start at your workspace to check availability. Hosted assistants need a publicly reachable HTTPS endpoint; installing code inside their sandbox does not create a hosted connector.

I denied consent or chose the wrong workspace

Start connection again and review the paying workspace before approving. A key stays in its issued workspace. To change an agent’s workspace, revoke its old authorization and sign in again with the intended selection.

Local login expired or was interrupted

Run opengen doctor using the installed CLI. Sign in again when expired or revoked. A stale profile lock requires checking that no OpenGen process is active before removing it; never bypass token-reuse checks or share the profile.

I want to disconnect

Revoke the connected app in OpenGen’s workspace, then remove its client configuration. For OpenGen’s CLI, opengen logout revokes before deleting the private profile. If revocation fails, keep the profile and retry.