Echo UI
Overview
Description from the maker (original English)
A tactile React component library, and the design system that keeps your AI agent on-brand.
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 checksi3 of 3 passedChecked from public information; code not scanned yet
- UsageiEarly★ –
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: Marketing & social media
Install
Pick the AI app you use, then copy the settings.
Before you install
- Basic checks: 3 of 3 passed
- Runs on the maker’s server: what you ask it goes through their server.
- Can do 10 things (tools) search_components, get_component, get_tokens, get_examples …
- 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://mcp.echo-ui.com/mcpRun this in your terminal
claude mcp add --transport http echo-ui https://mcp.echo-ui.com/mcpOr copy the settings yourself
Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json
{
"mcpServers": {
"echo-ui": {
"url": "https://mcp.echo-ui.com/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": {
"echo-ui": {
"type": "http",
"url": "https://mcp.echo-ui.com/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://mcp.echo-ui.com/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
Tool names and descriptions exactly as the server reported them on Nov 8, 2026. The maker wrote them, not us; we show them as plain text.
search_componentsFind the Echo UI item for a job ("a settings toggle", "confirm a delete") or by name. Leads with the best fit, or says plainly that Echo has nothing for the job yet, then lists every match with its install command. The cheapest way to find out what exists, and the first call befo
get_componentThe full record for one component: description, install command, usage (imports + smallest working snippet), composition (part tree), examples, accessibility, motion & sound, prop table and anti-patterns. It's for before writing code that uses the component: the anti-patterns are
get_tokensThe token families: Layer-3 semantic colour roles (--echo-*), sound names, motion's whole vocabulary — the motion tokens, the spring presets, the morph feels and the CSS duration and ease steps — and the shadow recipes. Any name a component's record lists under Motion is here. Ec
get_examplesJust the usage examples for one component, without the rest of its record. For when the component is already chosen and only its calling convention is needed.
get_accessibilityThe accessibility rules a consumer of Echo can still get wrong — names on controls, form errors, announcements, focus and target size — and, with a name, what that component's accessibility was actually tested against. Echo guarantees WCAG 2.2 AA; this is the part the guarantee c
check_codeEcho's check on a piece of code you've written or are about to write: colours, spacing, radii, shadows and timing off Echo's scales, raw elements where Echo has the component, props a component doesn't take, controls without a name, markup a keyboard or screen reader can't use, r
list_stylesEcho's own styles, the looks Echo publishes, each with its one line and its fingerprint on the seven axes styles are placed on; or, with a name, one of them in full: its settings, rules, refusals, fonts, decisions and the slop police's word. The builder's own styles aren't here:
fit_stylesStyle Fit's shortlist: Echo's styles, and the builder's own passed in, measured against where a product sits on the seven axes (warmth, volume, density, formality, era, craft, ornament) and put in order: a style that misses a locked axis last, then least past tolerance first, the
check_styleWhether a style.json is one Echo can apply, as `npx echo-ui-cli style check` says it: what stops it, the device it makes (light or dark), what the theme corrects for AA contrast, what the slop police stops (with the question for the builder) or the builder kept, and the decisions
wear_styleWhat a style gives a project: a link that makes the whole Echo site wear its colours, the commands that put it in a project, and, for a project without a terminal, its theme CSS and a DESIGN.md with its rules. One of Echo's styles by name, or the builder's own style.json. A style
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 8, 2026
- ✓ Pass
Maker matches the repo
The registry name was verified against the domain echo-ui.com (the registry checks domain ownership)
- … 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
- ✓ Pass
Endpoint responds
Responded in 199 ms (HTTP 200)
- – Not applicable
Sign-in with OAuth
No sign-in needed
- ✓ Pass
No hidden instructions in tool descriptions
Read 10 tool descriptions and found no hidden instructions to the AI
Compared with others in Marketing & social mediai
- More stars than 0% of the other 3601 servers in this category
- Published to the registry more recently than 94% of the other 3601 servers in this category
- Basic checks equal to or better than 100% of the other 3601 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 Echo UI safe?
It passed 3 of 3 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 (0.3.5) reached the registry yesterday.
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: MCP YouTube Transcript, Google Analytics MCP, BibiGPT YouTube Video Summarizer
Alternatives
Servers in the same category from other makers, sorted by stars.
Reading a card:↓ Downloads per weeki★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi
Google Analytics MCP
GA4 MCP server for AI agents: schema discovery, server-side aggregation, analysis-ready defaults.
BibiGPT YouTube Video Summarizer
AI video summarizer: summarize and transcribe YouTube, Bilibili, TikTok and podcast videos.
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.
echo-ui-mcp
An MCP server for Echo UI. It gives a coding agent ten tools over the Echo UI registry, so the agent can look up a component's props, usage, accessibility notes and anti-patterns before it writes code with it, check what it wrote, and find and wear a style.
Install
Every client runs the same command:
{
"mcpServers": { "echo-ui": { "command": "npx", "args": ["-y", "echo-ui-mcp"] } } }
- Claude Code:
claude mcp add echo-ui -- npx -y echo-ui-mcp - Codex: add it to
~/.codex/config.tomlas[mcp_servers.echo-ui], withcommand = "npx"andargs = ["-y", "echo-ui-mcp"]. - Cursor: add the block above to
.cursor/mcp.json. - VS Code: add it to
.vscode/mcp.json, underserversinstead ofmcpServers. - Other clients: any client that runs a stdio MCP server takes the same command.
Requires Node.js 20 or later.
Hosted
For tools that only connect to a server on the web (ChatGPT, claude.ai, Lovable, v0, Bolt, Claude Design), the same tools run at https://mcp.echo-ui.com/mcp: nothing to install, no account. Add it as a custom connector (a remote MCP server) with that address, or:
- Claude Code:
claude mcp add --transport http echo-ui https://mcp.echo-ui.com/mcp - Cursor:
{ "mcpServers": { "echo-ui": { "url": "https://mcp.echo-ui.com/mcp" } } }
It reads the same published documents as the package, and keeps nothing it's sent: check_code reads your code and forgets it, and its request logs hold the path, the status and the timing, never a body. Cloudflare, which hosts it, keeps those logs, with the address a request came from, for up to 7 days (privacy policy). check_code takes up to 200,000 characters, a request past what that needs is refused with 413 before it's read, and one address can send 300 requests in ten seconds and about 2 MB of large code a minute, each whole 16 KB of a request counting (429 past either, with Retry-After).
In Claude and ChatGPT, with Echo's skills
Echo's plugin carries the hosted server and Echo's three skills (Echo UI, Design Eye and Style Fit) in one install: echo-ui.com/docs/plugin. In ChatGPT it's in the plugin directory. Until Claude's directory lists it too, it installs from the docs: the Claude ZIP for claude.ai and Claude Code, and the Codex ZIP for Codex and ChatGPT desktop.
Tools
| Tool | Takes | Answers with |
|---|---|---|
search_components | query? | The item for a job ("a settings toggle", "confirm a delete"), or a plain "Echo has nothing for this yet", then one line per matching component with its install command. The same answer as the CLI's which. With no query, every component. |
get_component | name | The full record: description, install command, usage, composition, examples, accessibility, motion & sound, props and anti-patterns. Accepts echo-hardware-button, hardware-button or HardwareButton. |
get_tokens | — | The colour roles (--echo-*), sound names and motion names. |
get_examples | name | Just the examples for one component. |
get_accessibility | name? | The rules a consumer of Echo can still get wrong. With a name, that component's own record of what was tested and what is not. |
check_code | code, file? | Echo's check on a piece of code: the same rules as npx echo-ui-cli check, against the default theme, each finding with the Echo way to fix it. For a tool with no terminal to run the CLI in. |
list_styles | name? | Echo's own styles, each with its one line and fingerprint; with a name, that style in full. |
fit_styles | profile, tolerance?, yours? | Echo's styles and the builder's own (by fingerprint), ranked against where the product sits on the seven axes. The same arithmetic as npx echo-ui-cli style fit. |
check_style | style | Whether a style.json is one Echo can apply, as npx echo-ui-cli style check says it. |
wear_style | name or style, files? | A link that makes the Echo site wear the style (one of Echo's whole, your own in its colours), the command that puts it in a project, and, for a project with no terminal, its theme CSS and DESIGN.md. |
When it connects, the server also sends instructions: how to set the project up, how to wire the theme and sound, and the corrections agents most often need (Base UI's package is @base-ui/react; Echo components are installed with npx echo-ui-cli add, not npm install).
get_component returns the same text as the component's page in the Echo UI docs and its entry in llms-full.txt, plus what the component ships as: its version, the echo-ui-core range it needs, and its accessibility record. That half is read from the same registry echo-ui-cli installs from, with the same client, so the two cannot disagree.
Configuration
The server reads two published documents and re-reads them after five minutes: the catalog at https://echo-ui.com/r/catalog.json and the registry at https://echo-ui.com/e. To point it at a fork or a local build, set either:
{
"mcpServers": { "echo-ui": { "command": "npx", "args": ["-y", "echo-ui-mcp"], "env": { "ECHO_CATALOG": "/absolute/path/to/catalog.json", "ECHO_REGISTRY": "https://example.com/e" } } } }
If the registry cannot be reached the server still answers from the catalog, with the versions the catalog was built at. A copy it has already read keeps answering while its source can't be read, and is tried again every minute. If a file does not match the hash the registry published for it, the server says so rather than answering.
License
MIT