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Sleek

by sleek.design · remote · no sign-in to list tools · v1.0.1 · published by design.sleek

Design your mobile app UI with AI, then have your coding agent build the real app from it.

Deletes · 3Changes · 1
CompareRegistry entry

12 tools: 3 can delete or cancel things, 1 change things and 8 only read.

Scanned Oct 21, 2026

No check matched anything in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http sleek https://sleek.design/api/mcp

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

12 tools

Deletes or cancels 3Claude Code: deny
  • cancel_design_runAsk a design run to stop, for example when the brief was wrong.No findings

    Why it is in this group

    • The name "cancel_design_run" says "cancel": a word for removing or ending something.
    • The server marks it destructive (destructiveHint: true).
    Description, as the server wrote it
    Ask a design run to stop, for example when the brief was wrong. Returns the run as it stands right after the request. A queued run comes back 'failed' with error code 'cancelled' and never starts. A running run comes back still 'running' and stops at its next step. A run cut short settles as 'failed' with error code 'cancelled', or 'execution_failed' if saving its changes failed. It keeps any screens and theme changes it saved, listed in data.result.operations, and uses credits only when that list is not empty. A run that finishes before it stops settles as 'completed'. A run that had already settled comes back unchanged. The project stays locked until the run settles, so poll get_design_run before starting another run. A run that stopped responding settles as 'failed' with error code 'execution_timeout' 15 minutes after creation.

    Annotations the server declares

    • readOnlyHint: false
    • destructiveHint: true
    • idempotentHint: true
    • openWorldHint: false
  • delete_projectPermanently delete a project and all its screens.No findings

    Why it is in this group

    • The name "delete_project" says "delete": a word for removing or ending something.
    • The description says "Permanently delete".
    • The server marks it destructive (destructiveHint: true).
    Description, as the server wrote it
    Permanently delete a project and all its screens. Designs cannot be recovered. Call only after your user confirms the exact project by name. Never delete projects to tidy up on your own initiative.

    Annotations the server declares

    • readOnlyHint: false
    • destructiveHint: true
    • idempotentHint: true
    • openWorldHint: false
  • designRun Sleek's design agent to create or edit screens from a plain-language brief.Reads text others writeNo findings

    Why it is in this group

    • The description's first verb is "run": a word for a change.
    • The server marks it destructive (destructiveHint: true).

    What it can reach

    • untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
    Description, as the server wrote it
    Run Sleek's design agent to create or edit screens from a plain-language brief. Send the whole request as ONE message, such as 'a food delivery app with onboarding, restaurants, dish detail, cart, tracking, and profile'. The agent plans the screens together, so separate calls produce mismatched screens. A run uses workspace credits only when it completes or saves changes. By default this waits for the run to finish. If it returns 'queued' or 'running', poll get_design_run. Only one run can be active per project. On CONFLICT, poll get_design_run until the run settles, then retry. cancel_design_run stops it sooner. If a failed run has data.error.url, relay data.error.message to your user with that link. They have to act before you retry. On completion, share projectUrl with your user and call screenshot.

    Annotations the server declares

    • readOnlyHint: false
    • destructiveHint: true
    • idempotentHint: false
    • openWorldHint: true
Changes things 1Claude Code: ask
  • create_projectCreate an empty project.No findings

    Why it is in this group

    • The name "create_project" says "create": a word for a change.
    Description, as the server wrote it
    Create an empty project. Returns it in data, plus projectUrl. Pass data.id as projectId to design, then call screenshot. Creating a project is instant and uses no credits. Only design runs do. Share projectUrl so your user can watch and edit the designs.

    Annotations the server declares

    • readOnlyHint: false
    • destructiveHint: false
    • idempotentHint: false
    • openWorldHint: false
Only reads 8Claude Code: allow
  • get_componentFetch a screen's generated HTML.Reads text others writeNo findings

    Why it is in this group

    • The name "get_component" says "get": a word for reading.

    What it can reach

    • untrusted-inputThe description's first sentence says "fetch" and "html": it reads web pages, which anyone can write.
    Description, as the server wrote it
    Fetch a screen's generated HTML. Returns the screen in data, with the HTML at data.versions[].code. versions holds only the version the screen currently shows. Use allVersions for the full history, which can be large. The returned screenId is the value design takes. Use this for a build handoff, not to check whether a design run worked.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • get_design_runPoll a run that design returned as 'queued' or 'running'.No findings

    Why it is in this group

    • The name "get_design_run" says "get": a word for reading.
    Description, as the server wrote it
    Poll a run that design returned as 'queued' or 'running'. Wait a few seconds between polls. On 'completed', data.result.operations lists the saved screens and theme changes. Share projectUrl and call screenshot. On 'failed', relay data.error.message to your user, with data.error.url if present. A failed run, including a cancelled one, keeps what it saved in that same list and uses credits only when the list is not empty. Check it before resending the brief.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • get_projectFetch a project and its projectUrl.Reads text others writeNo findings

    Why it is in this group

    • The name "get_project" says "get": a word for reading.

    What it can reach

    • untrusted-inputThe description's first sentence says "fetch" and "url": it reads web pages, which anyone can write.
    Description, as the server wrote it
    Fetch a project and its projectUrl. Use it to confirm the project exists and share the URL with your user. Use list_components to see its screens.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • list_componentsList a project's screen names and active version numbers without generated HTML.Reads text others writeNo findings

    Why it is in this group

    • The name "list_components" says "list": a word for reading.

    What it can reach

    • untrusted-inputThe description's first sentence says "list" and "html": it reads web pages, which anyone can write.
    Description, as the server wrote it
    List a project's screen names and active version numbers without generated HTML. Pass each item's screenId to design. Pass its id as componentId to get_component or in componentIds to screenshot. Use get_component only when you need a screen's code.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • list_projectsList the workspace's projects, newest first.No findings

    Why it is in this group

    • The name "list_projects" says "list": a word for reading.
    Description, as the server wrote it
    List the workspace's projects, newest first. Each project holds one app's screens, theme, and design chat. Check here before create_project to avoid duplicates.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • list_referencesList curated app styles and their preview images.No findings

    Why it is in this group

    • The name "list_references" says "list": a word for reading.
    Description, as the server wrote it
    List curated app styles and their preview images. When your user asks for a look such as Airbnb, brutalist, or dark fintech, pass the closest reference's id as referenceId to design. Without a reference, the agent picks a style.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • screenshotRender up to four project screens side by side as one inline image, after a design run completes.No findings

    Why it is in this group

    • The name "screenshot" says "screenshot": a word for reading.
    Description, as the server wrote it
    Render up to four project screens side by side as one inline image, after a design run completes. Returns the image, PNG unless format asks for WebP, and a one-line text note. Rendering uses no credits. Send projectUrl with the image so your user can open and edit the designs.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • search_mentionsFind the workspace's projects by name for an @ mention, newest first.Reads text others writeNo findings

    Why it is in this group

    • The name "search_mentions" says "search": a word for reading.

    What it can reach

    • untrusted-inputThe name "search_mentions" says "search" and "mention": it reads comments, which other people can write.
    • untrusted-inputThe description's first sentence says "find" and "mention": it reads comments, which other people can write.
    Description, as the server wrote it
    Find the workspace's projects by name for an @ mention, newest first. Each item is a resource link whose name is the projectId and whose uri is the projectUrl. To browse every project, use list_projects.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Exfil surface

Which tools read private data, which read text someone else can write, and which can send data out. One of each is a path a prompt injection can use.

No private-data, untrusted-input, outbound path in this server alone: no tool is tagged private-data or outbound.

Reads private data0
Reads files, mail, messages, databases, secrets, calendars or repositories.
Reads text others write5
Brings in text someone else can write: web pages, inbound email, messages, issues and comments.
Can send data out0
Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.

Other servers in the same agent add their own tools to these paths. Audit your whole setup to see them together.

Remote posture

What anyone on the internet sees at the remote endpoint: an anonymous initialize and tools/list, and the public OAuth metadata.

Looked at Oct 22, 2026, 14:45 UTC, unchanged since Oct 22, 2026. No credentials were sent and no tool was called. What is looked at.

Reachable
yes
HTTP status of an anonymous initialize
200
tools/list served without credentials
yes
Tools that change things, listed without credentials
4
Protocol version
2025-06-18
WWW-Authenticate on 401
not observed
resource_metadata in WWW-Authenticate
none
RFC 9728 protected resource metadata
https://sleek.design/.well-known/oauth-protected-resource/api/mcp
Authorization servers
https://ggrhecslgdflloszjkwl.supabase.co/auth/v1
Legacy HTTP+SSE transport
no
Dynamic client registration
yes
Client ID metadata documents
no
  • HighThe whole server

    The endpoint served tools/list without credentials, and the list has 4 tools that change things (3 destructive, 1 write). Whether a call also works without credentials was not tested: tools are never called.

    Matched text

    https://sleek.design/api/mcp: tools/list returned 12 tools to an anonymous client, including delete_project (destructive), design (destructive), cancel_design_run (destructive), create_project (write)

    What this check looks for

Install

Pinned to version 1.0.1. Values in angle brackets are yours to fill in.

claude mcp add --transport http sleek https://sleek.design/api/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change or a way out, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__sleek__list_projects",
      "mcp__sleek__get_project",
      "mcp__sleek__list_components",
      "mcp__sleek__get_component",
      "mcp__sleek__list_references",
      "mcp__sleek__get_design_run",
      "mcp__sleek__screenshot",
      "mcp__sleek__search_mentions"
    ],
    "ask": [
      "mcp__sleek__create_project"
    ],
    "deny": [
      "mcp__sleek__delete_project",
      "mcp__sleek__design",
      "mcp__sleek__cancel_design_run"
    ]
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. A read that can send data out (it takes a URL, say) asks first too. It assumes the server is installed as sleek. Review it before you use it.

Capability tags behind 5 rules
  • mcp__sleek__get_project untrusted-input
  • mcp__sleek__list_components untrusted-input
  • mcp__sleek__get_component untrusted-input
  • mcp__sleek__design untrusted-input
  • mcp__sleek__search_mentions untrusted-input