Arc UI
REMOTE · UIARC.DEV · SCANNED OCT 6
React components and blocks with motion. Search docs, props and shadcn install commands.
Available components
How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score → Why this is hard to score →
Endpoint Security81
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- The endpoint enforces authorisation, advertised via RFC 9728 protected-resource metadata. View diagnostics → Pass
- HTTPS enforcement could not be verified: the plaintext port answered with HTTP 405, which proves neither a plaintext path nor enforcement. View diagnostics → Unverified
- HSTS check failed: the Strict-Transport-Security header is absent. See how to fix → View diagnostics → Fail
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
- The authorisation server supports Client ID Metadata Documents, the current MCP client-registration mechanism. View diagnostics → Pass
Transport & Reachability0
- Transport blocked by authentication: the endpoint requires auth we don't have to verify streamable-http. See how to fix → View diagnostics → Unverified
Schema Quality & AI Usability0
- Schema blocked by authentication: the endpoint requires auth we don't have to read it. See how to fix → Unverified
Stability & Change Management0
- Stability not yet verified: not enough scan history yet (needs a 30-day window).Unverified
Tool Coverage0
- Tool coverage blocked by authentication: the endpoint requires auth we don't have to read its tools.Unverified
Tool Safety0
- Tool safety blocked by authentication: the endpoint requires auth we don't have to read its tools.Unverified
Capabilities0
- Capabilities blocked by authentication: the endpoint requires auth we don't have to read them. See how to fix → Unverified
Unverified: 6 categories
Categories scored 0 because we could not verify them: authentication we do not have, an unreachable endpoint, or not enough scan history. We only credit what we can confirm. Claim this server and supply a read-only token to verify it and lift the score.
How do I install the Arc UI MCP server?
Arc UI is a hosted endpoint at https://uiarc.dev/api/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
remote · uiarc.dev
claude mcp add --transport http dev-uiarc-arc 'https://uiarc.dev/api/mcp'
{
"mcpServers": {
"dev-uiarc-arc": {
"url": "https://uiarc.dev/api/mcp"
}
}
} {
"servers": {
"dev-uiarc-arc": {
"type": "http",
"url": "https://uiarc.dev/api/mcp"
}
}
} [mcp_servers.dev-uiarc-arc] url = "https://uiarc.dev/api/mcp"
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"dev-uiarc-arc": {
"type": "remote",
"url": "https://uiarc.dev/api/mcp",
"enabled": true
}
}
} openclaw mcp add dev-uiarc-arc --url 'https://uiarc.dev/api/mcp' --transport streamable-http
mcp_servers:
dev-uiarc-arc:
url: "https://uiarc.dev/api/mcp" {
"McpServers": {
"dev-uiarc-arc": {
"Transport": "http",
"Url": "https://uiarc.dev/api/mcp"
}
}
} assistant mcp add dev-uiarc-arc -t streamable-http -u 'https://uiarc.dev/api/mcp'
{
"mcpServers": {
"dev-uiarc-arc": {
"type": "http",
"url": "https://uiarc.dev/api/mcp"
}
}
} The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 3 Oct 26 −32
- Endpoint reachability: reachable → behind authorisation ▼ security
- Tool safety: pass → unverified ▼ security
- Stability: 0.07 → unverified ▼ security
- Transport: pass → unverified ▼ security
- Authorization: partial → pass ▲ security
- First check of Authorization: pass security
- Capabilities: pass → unverified ▼ functional
- Tool coverage: 100 → unverified ▼ functional
- First check of Schema quality: unverified functional
- 1 Oct 26 +1
- Stability: unverified → 0.03 ▲ functional
- 30 Sept 26 63
First indexed and scored.
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 6 Oct 2026 · Probed https://uiarc.dev/api/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=uiarc.dev | CN=WE1,O=Google Trust Services,C=US | 2 Oct 2026 | 31 Dec 2026 | ECDSA 256 | ECDSA-SHA256 | 4b35579441d9626913969be309f7ad36 |
| SANs: uiarc.dev, email.uiarc.dev, *.email.uiarc.dev | ||||||
| CN=WE1,O=Google Trust Services,C=US (CA) | CN=GTS Root R4,O=Google Trust Services LLC,C=US | 13 Dec 2023 | 20 Feb 2029 | ECDSA 256 | ECDSA-SHA384 | 7ff31977972c224a76155d13b6d685e3 |
| CN=GTS Root R4,O=Google Trust Services LLC,C=US (CA) | CN=GlobalSign Root CA,OU=Root CA,O=GlobalSign nv-sa,C=BE | 15 Nov 2023 | 28 Jan 2028 | ECDSA 384 | SHA256-RSA | 7fe530bf331343bedd821610493d8a1b |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of uiarc.dev. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| dev. | present | 60074 | 8 | Verified |
| uiarc.dev. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication Enforced and verified
The endpoint asked for a token and published valid RFC 9728 metadata describing how to get one.
| Result | Enforced and verified |
|---|---|
| Enforced | On connection |
| HTTP status | 401 |
WWW-Authenticate challenge Bearer resource_metadata="https://uiarc.dev/.well-known/oauth-protected-resource/api/mcp", scope="openid profile email"
Bearer resource_metadata="https://uiarc.dev/.well-known/oauth-protected-resource/api/mcp", scope="openid profile email"| Header | Value |
|---|---|
| www-authenticate | Bearer resource_metadata="https://uiarc.dev/.well-known/oauth-protected-resource/api/mcp", scope="openid profile email" |
Protected resource metadata
| Document | https://uiarc.dev/.well-known/oauth-protected-resource/api/mcp |
|---|---|
| Retrieved | Yes |
| Resource | https://uiarc.dev/api/mcp |
| Authorisation server | https://clerk.uiarc.dev |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://uiarc.dev/api/mcp | Auth required | 401 | |
| http (plaintext) | http://uiarc.dev/api/mcp | Inconclusive | 405 |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
get_component Get an Arc component ~130
Get full documentation for one Arc component or block: when to use it, when not to (with the better alternative), usage and extra examples, props, keyboard, accessibility, motion, responsive behavior, performance, keywords, related items, and the install command. structuredContent.api carries the same fields as JSON. With an Arc Pro token (Authorization header), Pro items also include their full source files in structuredContent.files.
| Name | Type | Req | Description |
|---|---|---|---|
| id | string | yes | Component or block id, e.g. button, date-picker, or signup-form |
| kind | string | – | Only needed when an id exists as both |
No output schema declared.
No examples provided.
get_install_command Get the Arc install command ~77
Get the shadcn CLI command that installs one or more Arc components or blocks, including shared foundation tokens and Arc dependencies, plus setup notes. Free items always; Pro items (@uiarc-pro registry) when the connection carries an Arc Pro token.
| Name | Type | Req | Description |
|---|---|---|---|
| ids | array | yes | Component or block ids |
| runner | string | – | – |
No output schema declared.
No examples provided.
get_skill Get an Arc skill ~371
Get one Arc skill file as markdown: rules for building with Arc. Free skills: SKILL (entry point: workflow, principles, never-do list, and quick decisions); INSTRUCTIONS (short always-on rules for agents.md, claude.md, or cursor rules); checklist (the review loop to run before finishing, with grep sweeps); components (choosing the right component or block by job, with ids); composition (page containers, dashboards, marketing sections, states, react correctness); copy (sentence case, no eyebrows or em dashes, verbs on buttons, honest claims); design (color, type, surfaces, concentric radii, spacing, and icons); motion (motion tokens, spring choice, patterns with code, reduced motion); accessibility (focus without rings, semantics, keyboard, and announcements); responsive (widths to check, overflow, tables, and touch targets); example-settings (a worked account settings page); example-pricing (a worked pricing section with plans, comparison, and faq); example-dashboard (a worked analytics overview with kpis, chart, and table). Pro skills (arc-pro, full-page-generation, page-composition, design-system-generation, refactor-to-arc, motion-recommendations, responsive-optimization, accessibility-audit) are returned in full when the connection carries an Arc Pro token (otherwise signed-in Pro members download them at /api/skills and this tool returns where).
| Name | Type | Req | Description |
|---|---|---|---|
| id | string | yes | One of: SKILL, INSTRUCTIONS, checklist, components, composition, copy, design, motion, accessibility, responsive, example-settings, example-pricing, example-dashboard, arc-pro, full-page-generation,… |
No output schema declared.
No examples provided.
list_components List Arc components ~116
List Arc components and blocks with name, description, tier, and links. Filter by category (Actions, Inputs, Disclosure, Feedback, Data, Text, Special, Blocks), tag, tier (free or pro), or kind (component or block).
| Name | Type | Req | Description |
|---|---|---|---|
| category | string | – | One of: Actions, Inputs, Disclosure, Feedback, Data, Text, Special, Blocks |
| kind | string | – | – |
| tag | string | – | A tag such as motion, form, menu, or overlay |
| tier | string | – | – |
No output schema declared.
No examples provided.
search_components Search Arc components ~79
Search Arc components and blocks by intent, e.g. "confirm destructive action", "date range", or "pricing page". Returns the best matches first.
| Name | Type | Req | Description |
|---|---|---|---|
| kind | string | – | – |
| limit | integer | – | – |
| query | string | yes | What you want to build or the component you are looking for |
| tier | string | – | – |
No output schema declared.
No examples provided.
What is the Arc UI MCP server?
Arc UI is an MCP server listed in the public MCP registry as dev.uiarc/arc. React components and blocks with motion. Search docs, props and shadcn install commands. This page covers its hosted endpoint (https://uiarc.dev/api/mcp).
Is the Arc UI MCP server safe to use?
Arc UI scores 32 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the Arc UI MCP server expose?
Arc UI exposes 5 tools: list_components, search_components, get_component, get_install_command, get_skill. Their descriptions and schemas cost roughly 773 tokens of context every time the server is loaded.
Does the Arc UI MCP server require authentication?
Yes. Arc UI asked us for credentials when we connected, so you will need to authorise it in your MCP client before it can do anything.
Is the Arc UI MCP server still maintained?
Arc UI is still listed as active in the MCP registry. We last reached this channel on 6 October 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.