Spec Driven Development
by formulahendry
MCP Server that facilitates spec-driven development workflows, not just Vibe Coding.
Runs on your computer★ 440MITUpdated 14 months ago
Install
Charming
Overview
Description from the maker (original English)
Build personal interactive apps with real URLs and persistent storage, using any AI.
PopNx MCP’s three pillars
These three are never merged into one score: opinions, measurements and popularity are different things.
- User voiceiNo reviews yetReviews open together with accounts in a later step
- Our basic checksi0 of 1 passedChecked from public information; code not scanned yet
- UsageiNot measured yet★ –
What you can do with it
We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.
- Connection: Runs in the cloud
- Transport: Streamable HTTP
- Category: Other
Install
Pick the AI app you use, then copy the settings.
Before you install
- Basic checks: 0 of 1 passed
- Runs on the maker’s server: what you ask it goes through their server.
- The registry lists no key to fill in.
You need
- Runs in the cloudNothing to install; it connects over the internet
Which app do you use?
Pick your app above. We remember it, so next time the button says “Install in …”.
Works in Claude on the web, desktop and mobile:
- Open Settings → Connectors
- Press Add custom connector
- Paste the address below and press Add
- If it asks you to sign in, sign in with the maker
https://charm.ing/mcpRun this in your terminal
claude mcp add --transport http charming https://charm.ing/mcpOr copy the settings yourself
Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json
{
"mcpServers": {
"charming": {
"url": "https://charm.ing/mcp"
}
}
}Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.
Or copy the settings yourself
Paste into .vscode/mcp.json in your project
{
"servers": {
"charming": {
"type": "http",
"url": "https://charm.ing/mcp"
}
}
}Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.
ChatGPT connects only to servers on the internet:
- Open ChatGPT on the web → Settings → Connectors (Apps)
- Press Create or Add (some plans need Developer mode under Advanced first)
- Paste the address below, give it a name and save
- If it asks you to sign in, sign in with the maker
https://charm.ing/mcpMenu names can differ slightly by plan and over time.
Your choice stays on this device in a cookie; no account needed.
These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.
What it can do
We have not read this server’s tool list yet; we check endpoints in rotation.
Basic checksi
We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 7, 2026
- ! Caution
Maker matches the repo
The publisher (tambo-ai) is not the repo owner (tambo-labs); someone else may have listed it
- … Not checked yet
Still maintained
We have not read this repo from GitHub yet
- … Not checked yet
Has a licence
We have not read this repo from GitHub yet
- … Not checked yet
Endpoint responds
Not checked yet; we check endpoints in rotation
- … Not checked yet
Sign-in with OAuth
Not checked yet; we check endpoints in rotation
- … Not checked yet
No hidden instructions in tool descriptions
Not checked yet; we read the tool list when we check the endpoint
Compared with others in Otheri
- More stars than 0% of the other 32655 servers in this category
- Published to the registry more recently than 17% of the other 32655 servers in this category
- Basic checks equal to or better than 30% of the other 32655 servers in this category
Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.
Common questions
Is Charming safe?
It passed 0 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.
What keys or codes does it need?
The registry does not list a required key, though some servers ask you to sign in on first use.
Does it run on my computer or in the cloud?
It runs in the maker’s cloud. Connect over the internet with nothing to install, but what you send passes through the maker’s servers.
Is it still maintained?
The GitHub repo last changed –, and the latest version (1.0.1) reached the registry 4 months ago.
Which apps can use it?
Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT in developer mode.
What can I use instead?
In the same category: Spec Driven Development, Remote Desktop Commander, SuperCollider
Alternatives
Servers in the same category from other makers, sorted by stars.
Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi
Remote Desktop Commander
by desktop-commander
Remote Desktop Commander: use files, terminal and processes on your own computers from any AI app.
Runs in the cloud★ 211Updated 2 days ago
Install
SuperCollider
by Tok
Make sound with SuperCollider: synths, drums, chords, melodies and soundscapes over OSC.
Runs on your computerUpdated today
Install
README from the maker
Open the README
Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.
Charming MCP Server
Charming is a hosted MCP server that generates, hosts, and updates interactive web apps. Connect it to any MCP-compatible AI client and ask it to build an app. You get back a live URL in seconds.
Connect
| 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) |
Most MCP clients can use this remote configuration:
{"mcpServers": { "charming": { "url": "https://charm.ing/mcp", "type": "streamableHttp" } } }
The MCP endpoints require a bearer token, and OAuth with Dynamic Client Registration bootstraps one automatically: clients that support it show a one-time consent screen, with no API key to paste. Anonymous creation with no token is available on the HTTP path only. Auth guide: usecharming.com/auth.md.
For per-client paste-strings and setup steps, see usecharming.com/clients.txt.
Starter Prompt
Once Charming is connected, paste this to start a build session:
Help me figure out what to build. Look at what you know about me and suggest 2-3 apps that fit, or ask me up to 3 short questions to find an idea.Read https://usecharming.com/start.md then help me create my first app.
Tools
Charming exposes 39 tools. Connected clients discover them automatically via tools/list.
| 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. |
acknowledge_feedback_responses | Acknowledge feedback responses after the agent has processed them. |
cancel_app_build | Use this to cancel an accepted app build before it publishes. |
create_routine | Use this when the user wants an app op to run on its own, on a timer — no chat needs to be open. |
delete_routine | Use this to stop and remove a Routine. |
get_app_build | Use this to inspect an accepted app build without running or publishing it. |
list_feedback_responses | Fetch unread Charming staff responses to feedback submitted by this authenticated account. |
list_routines | Use this to see the caller's Routines across their apps. |
read_docs | Read Charming documentation without web access. |
update_routine | Use this to change a Routine's interval, or enable/disable it. |
create_webhook | Use this when an external service (Zapier, a payment provider, a partner backend) needs to call one of an app's ops directly. |
delete_webhook | Use this to remove a Webhook. |
list_webhooks | Use this to see the Webhooks on every app the caller can edit, with delivery state. |
update_webhook | Use this to rename a Webhook, enable/disable it, or rotate its secret. |
copy_app | Use this to make the signed-in user a private copy of an existing app in one call, without reading or re-sending its source. |
resolve_handoff | Resolve a Charming handoff reference into diagnostic data about a problem in one of the caller's apps. |
Use with a coding agent
Working in Codex, Claude Code, Cursor, or another AI coding agent? Install the optional Charming authoring skill from skills.sh with npx skills add tambo-labs/charming-mcp. This installs authoring guidance; it does not connect the MCP server.
It teaches the agent Charming's build contract and workflow. The skill itself is SKILL.md; AGENTS.md has connect and authoring instructions for any AI coding agent. Codex users can instead install the bundled Charming Codex plugin.
Cursor
Cursor reads project rules from .cursor/rules/. Drop .cursor/rules/charming.mdc into your project (or copy its body into a legacy root .cursorrules) and Cursor's agent will reach for Charming (real URL, storage, and inline rendering) whenever you ask for an app you want to keep. The rule points at the served docs; it does not duplicate the contract.
Distribution
This repository is the canonical source for every public Charming integration package. Platform-neutral artifacts are hand-edited; platform adapters are generated from them, so a fact lives in exactly one file.
| 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 |
npm ci # install ajv, the schema validatornode scripts/build-packages.mjs # regenerate every adapter node scripts/build-packages.mjs --check # fail on drift (runs in CI)
The adapters are not published yet; publishing each one is tracked separately. See DISTRIBUTION.md for the layout, the drift checks, and how the Charming monorepo proposes changes here.
Documentation
- Agent skill:
SKILL.md· coding-agent guide:AGENTS.md· Cursor rule:.cursor/rules/charming.mdc - Full authoring guide: usecharming.com/llms-full.txt
- Auth and pairing: usecharming.com/auth.md · limits: usecharming.com/pricing.md
- OpenAPI spec: charm.ing/.well-known/openapi.json
- Docs: usecharming.com/docs
Built with Composio
Charming uses Composio to connect apps with external services such as Gmail, Google Drive, and GitHub. Composio holds each OAuth token and runs each connector call; Charming decides whether a call may run and whose connection serves it.
Publisher
Published by Tambo.