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8 clients · secrets stay placeholders

JSON (mcpServers)Claude CodeCodexOpenCodeCursorVS CodeGemini CLIGoose

{
  "mcpServers": {
    "uml-plantuml": {
      "type": "http",
      "url": "https://uml.singsk.com/mcp"
    }
  }
}

claude mcp add --transport http uml-plantuml https://uml.singsk.com/mcp

[mcp_servers.uml-plantuml]
url = "https://uml.singsk.com/mcp"

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "uml-plantuml": {
      "type": "remote",
      "url": "https://uml.singsk.com/mcp",
      "enabled": true
    }
  }
}

{
  "mcpServers": {
    "uml-plantuml": {
      "type": "http",
      "url": "https://uml.singsk.com/mcp"
    }
  },
  "deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=uml-plantuml&config=eyJ0eXBlIjoiaHR0cCIsInVybCI6Imh0dHBzOi8vdW1sLnNpbmdzay5jb20vbWNwIn0%3D"
}

{
  "servers": {
    "uml-plantuml": {
      "type": "http",
      "url": "https://uml.singsk.com/mcp"
    }
  }
}

{
  "mcpServers": {
    "uml-plantuml": {
      "httpUrl": "https://uml.singsk.com/mcp"
    }
  }
}

extensions:
  "uml-plantuml":
    enabled: true
    name: "uml-plantuml"
    type: streamable_http
    uri: "https://uml.singsk.com/mcp"
    timeout: 300

Quality 79 / 100good

protocol75 · weight 25

warn
protocol.modernnewest supported version is 2025-06-18; 2026-07-28 not supported, older versions are deprecated until 2027-07-28
n/a
protocol.statelessonly applies to 2026-07-28 servers
pass
protocol.transportstreamable HTTP
n/a
protocol.list_ttlonly applies to 2026-07-28 servers

authorizationn/a · weight 15

n/a
auth.prm, auth.as_metadata, auth.cimdno remote uses OAuth
n/a
auth.secret_in_urlno templated URL

tool hygiene71 · weight 30

pass
tools.descriptionsevery tool has a description
pass
tools.description_lengthdescriptions are concise
pass
tools.schemasevery tool has an object input schema
fail
tools.annotationsno tool declares readOnlyHint or destructiveHint, so clients cannot tell safe calls from risky ones
fail
tools.directory_hintsno tool declares all four of readOnlyHint, destructiveHint, idempotentHint and openWorldHint; missing: render_diagram (readOnlyHint, destructiveHint, idempotentHint, openWorldHint); encode_source (readOnlyHint, destructiveHint, idempotentHint, openWorldHint); decode_token (readOnlyHint, destructiveHint, idempotentHint, openWorldHint); …
pass
tools.token_costabout 633 tokens to load every tool
pass
tools.api_dumptools are not a one-to-one API dump

stability100 · weight 15

pass
stability.changesno tool changes in 30 days
pass
stability.rug_pullno tool changed its meaning under the same name

dependenciesn/a · weight 15

n/a
deps.known_vulns, deps.mcp_sdk_version, deps.resolvableno npm or PyPI package

6 tools, about 633 tokens to load them all · tool set 83d839a5adf0 · checked 2026-10-21 01:06 UTC

Tool changes

No tool definition changes recorded. A server's first observation is its baseline; later probes record what changes.

Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed. How it is computed.

Trust 54 / 100

no-repository

provenance55

liveness16

freshness85

hygiene80

+dns-namespace +website -unreachable(1 failures) ~updated-52d-ago -no-repository

Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed. How it is computed.

Endpoints

remote	auth	reachable	uptime 30d	p50	protocol	last ok
`https://uml.singsk.com/mcp` streamable-http	none	no (1 failures)	64%	1110 ms	2025-06-18	2026-10-20

Tools (6)

`decode_token`	Recover the PlantUML source from a token or from any PlantUML render URL (the token is extracted automatically). Tokens use PlantUML's own 64-character alphabet ("0-9 A-Z a-z - _") over raw DEFLATE. This is NOT base64 - never encode or decode tokens with a base64 codec; use encode_source / decode_token.
`encode_source`	Encode PlantUML source into a URL token and ready-to-use share/render URLs (svg + png). The result carries url_ok: GET URLs only work while the token is at most 16000 characters; when url_ok is false do not share the URLs - render with render_diagram instead (it uses the POST API, no size limit up to 5 MB). Tokens use PlantUML's own 64-character alphabet ("0-9 A-Z a-z - _") over raw DEFLATE. This is NOT base64 - never encode or decode tokens with a base64 codec; use encode_source / decode_token.
`get_syntax_reference`	Get the syntax reference entry for one diagram type: description, a render-verified example, and the help page URL. Use it to ground diagram generation.
`list_diagram_types`	List the 22 supported diagram/reference types with a one-line description and the local syntax reference URL for each. Use it to pick the right @start directive.
`render_diagram`	Render PlantUML source text to a diagram image. Returns a PNG image block (format "png") or the SVG markup as text (format "svg", default), plus the shareable render URL. The source is validated first: on a syntax error the result is an error object with line, column, hint and a help link so you can fix the diagram and retry.
`validate_diagram`	Check PlantUML source without rendering. Returns {ok:true, diagram_type} or {ok:false, error:{code, message, line, column, source_line, hint, diagram_type_detected, help}}. Cheap - call it in a generate -> validate -> fix loop before rendering.

Schemas: list_tools.

Similar MCP servers

Official server.json

{
  "name": "com.singsk/uml-plantuml",
  "title": "uml.singsk.com PlantUML",
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "remotes": [
    {
      "url": "https://uml.singsk.com/mcp",
      "type": "streamable-http"
    }
  ],
  "version": "1.1.0.2",
  "websiteUrl": "https://uml.singsk.com/",
  "description": "Render, validate, encode/decode PlantUML diagram-as-code; 22 diagram types. Free, no auth."
}