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Watermelon UI

by watermelon.sh · remote · no sign-in to list tools · v2.0.0 · published by sh.watermelon

Search free React, Tailwind, and shadcn components, blocks, and dashboards; get installable source.

Changes · 1
CompareRegistry entry

8 tools: 1 change things and 7 only read.

Scanned Oct 21, 2026

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

claude mcp add --transport http ui https://mcp.watermelon.sh/mcp

Findings

Matches of fixed checks, with the text they matched.

1 warn
  • Warncompose_page

    The server marks "compose_page" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

    Matched text

    annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The description's first verb is "create": a word for a change.

    What this check looks for

Tools

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

8 tools

Changes things 1Claude Code: ask
  • compose_pageCreate a source-backed page plan by selecting compatible Watermelon blocks for each requested section.1 finding

    Why it is in this group

    • The description's first verb is "create": a word for a change.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.

    Findings

    • Warn

      The server marks "compose_page" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

      Matched text

      annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The description's first verb is "create": a word for a change.

      What this check looks for
    Description, as the server wrote it
    Create a source-backed page plan by selecting compatible Watermelon blocks for each requested section.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
Only reads 7Claude Code: allow
  • catalog_summaryReturn top-level Watermelon catalog counts across content types.No findings

    Why it is in this group

    • The description's first verb is "return": a word for reading.
    Description, as the server wrote it
    Return top-level Watermelon catalog counts across content types.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • get_catalog_entryCompatibility alias for getting one Watermelon entry by kind and slug.No findings

    Why it is in this group

    • The name "get_catalog_entry" says "get": a word for reading.
    Description, as the server wrote it
    Compatibility alias for getting one Watermelon entry by kind and slug.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • get_componentGet a Watermelon entry with preview, dependencies, install command, and source files when an installable registry item is available.No findings

    Why it is in this group

    • The name "get_component" says "get": a word for reading.
    Description, as the server wrote it
    Get a Watermelon entry with preview, dependencies, install command, and source files when an installable registry item is available.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • get_inspirationReturn 3-6 visually relevant Watermelon UI options for a design goal before choosing an implementation.No findings

    Why it is in this group

    • The name "get_inspiration" says "get": a word for reading.
    Description, as the server wrote it
    Return 3-6 visually relevant Watermelon UI options for a design goal before choosing an implementation.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • list_catalog_entriesCompatibility alias for listing Watermelon entries by kind.No findings

    Why it is in this group

    • The name "list_catalog_entries" says "list": a word for reading.
    Description, as the server wrote it
    Compatibility alias for listing Watermelon entries by kind.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • list_categoriesList Watermelon UI categories and accurate entry counts, optionally for one catalog kind.No findings

    Why it is in this group

    • The name "list_categories" says "list": a word for reading.
    Description, as the server wrote it
    List Watermelon UI categories and accurate entry counts, optionally for one catalog kind.

    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.

Install

Pinned to version 2.0.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http ui https://mcp.watermelon.sh/mcp

Run in a terminal.

Claude Code permissions

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

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__ui__search",
      "mcp__ui__get_component",
      "mcp__ui__get_inspiration",
      "mcp__ui__list_categories",
      "mcp__ui__catalog_summary",
      "mcp__ui__list_catalog_entries",
      "mcp__ui__get_catalog_entry"
    ],
    "ask": [
      "mcp__ui__compose_page"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as ui. Review it before you use it.