box by Simular for ChatGPT and Codex

The OpenAI plugin package: one listing covers ChatGPT and Codex. It connects the remote MCP server https://mcp.box.simular.ai/mcp with OAuth (dynamic client registration) and ships two skills: get-started (onboarding) and box (a copy of claude/skills/box/SKILL.md).

Format: OpenAI's portable plugin layout (https://developers.openai.com/plugins/build/plugins): plugin.json with listing, review test cases and release notes under extensions.com.openai, mcp.json, skills/ and assets/ (the box mark, rendered from box-portal public/favicon.svg).

Build the ZIP

openai/build-zip.sh            # writes box-by-simular-openai-<version>.zip in the current folder

Upload it at https://platform.openai.com/plugins (Upload new or existing plugin, "With MCP").

Not in the package (entered in the portal)

• The reviewer test account and its sign-in steps. Never put credentials in this folder.
• The demo video link, unless it is added here as review.demo_recording_url.
• The domain verification token: box serves it at https://mcp.box.simular.ai/.well-known/openai-apps-challenge (prod values, oauth.openai_apps_challenge).

Releasing an update

Bump version in plugin.json (OpenAI refuses an unchanged version), update publication.release_notes, rebuild and upload. name (box-by-simular) can never change. Tool changes on the MCP server need no new ZIP; OpenAI rescans the server.