Client

Endpoint

Claude, Claude Code, Cursor, Codex, Gemini CLI, and most MCP clients

https://charm.ing/mcp

ChatGPT

https://charm.ing/mcp/chatgpt (one-click via the Charming listing in the ChatGPT Apps directory; this paste-string is the Developer Mode fallback)

Tool

What it does

create_app

Store an agent-authored module (a manifest plus routes) with optional UI and CSS, and render it inline. Requires a description. Give the user the returned token-free shareUrl, never the machine-only url.

update_app

Edit an existing app by replacing its module/UI/styles/description or applying exact-string edits, with optimistic-concurrency versioning.

get_app

Render an existing app inline (where the client supports it) and return its callable API operations and metadata.

get_app_source

Return the persisted module, UI, and styles for an existing app plus its current version.

list_apps

List the caller's apps plus apps shared with them, newest first, with each app's role, description, and capabilities.

delete_app

Permanently delete an app you own. Irreversible and confirmation-gated: it fails closed until re-invoked with confirm: true. Pass purge_storage: true to also wipe stored state.

upload_asset

Store a static asset (image, PDF, dataset) so app code stays small; readable back same-origin.

rename_app

Change an app's URL slug. The old URL keeps working by redirecting.

set_remixable

Mark an app remixable so visitors get their own editable copy.

unset_remixable

Stop allowing remixes; existing remixes survive untouched.

set_starter_prompt

Set or clear the prompt prefilled in the chat host when a visitor opens a shared app.

query_app

Run a read-only backend operation inside an app module.

mutate_app

Run a mutating backend operation inside an app module without editing code.

submit_feedback

Record agent-authored feedback (bugs, enhancements, crash reports) about an app.

list_feedback

List feedback rows for the caller's apps, newest first.

set_handle

Change the signed-in user's handle (the first segment of their app URLs).

share_app

Invite someone to an app as collaborator (default), end-user (run and write data, cannot edit source), or viewer (read-only). Calling it again with a role changes their role in place.

unshare_app

Revoke access for any grantee, whether the invitation is still pending or already accepted.

list_app_shares

List active and pending share invites for one of your apps.

set_public

Make an app public: anyone with the URL can open it with no login and read AND write its shared data. Warn the user that every anonymous visitor shares one data pool, so anyone with the URL can overwrite or wipe it.

unset_public

Make a public app private again; anonymous visitors can no longer open it.

set_template

Publish an app as a template so anyone opening its URL gets their own brand-new copy, leaving the original untouched. Pass listed: true to also list it in the public directory. Omitting listed leaves the current listing state alone. The app must be claimed first.

unset_template

Stop treating an app as a template: new visitors can no longer copy it, and any public listing is cleared. Existing copies survive.

search_templates

Search the public Charming template directory by keyword. Check here for an existing template before calling create_app, or when the user asks what templates exist. Each hit carries a copyUrl a visitor can open to mint their own independent copy with no login.

Kind

Artifact

Platform-neutral (edit these)

canonical/facts.json, SKILL.md, AGENTS.md, .cursor/rules/charming.mdc, charming-icon.png

Adapter (generated)

plugins/cursor/charming, plugins/claude-code/charming, plugins/codex/charming, plugins/agent-plugins/charming (a portable Agent Plugins v1.0.0 package), gemini-extension.json, GEMINI.md, the three marketplace catalogs