Koskamo

Zovo Activity Diagram MCP

Generates UML activity diagrams from plain text, validates flow reachability, and exports to PDF, SVG, and CSV formats.

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Endpoint and access

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Zovo Activity Diagram MCP logo, by ZovoCommunity listingStreamable HTTPNo sign-inEndpoint checked 2026-11-08Published by Zovo
MCP endpoint (Streamable HTTP)
https://activity-diagram.zovo.one/mcp
Vendor documentation

What its tools do

2 tools, grouped by the hints the server advertises. Hints are self-declared, not verified behavior.

Read-only (2)

2 of 2 have a description · 2 of 2 declare behavior hints · 2 of 2 with parameters document them all

Checks and signals

Each line is separate evidence, not a trust score.

  • Passed Endpoint answered the live check ·
  • Availability 1 of 1 checks passed in 30 days

What you can do with it

  • Generate UML activity diagrams from text
  • Check for unreachable steps in flow
  • Export diagrams to PDF, SVG, or CSV

Source and maintenance

Community listingRegistry 1.0.0
mcp-registry: io.github.theluckystrike/activity-diagram@1.0.0Project website

Protocol and capabilities

Server
activity-diagram 1.0.0
MCP protocol negotiated in check
2025-11-25
Tools
2 advertised
Resources
1 advertised
Resource templates
1 advertised
Prompts
Not advertised
Server-advertised capabilities
{
  "tools": {
    "listChanged": true
  },
  "resources": {
    "listChanged": true
  }
}

Server-provided instructions

Untrusted server output shown for inspection. It is not Koskamo guidance and is excluded from knowledge search.

Zovo Activity Diagram draws a UML activity diagram (a flowchart of steps, decisions, loops and parallel branches) from a short line grammar, with PDF, SVG and CSV downloads, and checks the flow: steps that are not reachable and empty branches. Use make_activity_diagram to draw it and check_activity_diagram to check the text without drawing. Grammar, one statement per line: start, stop, end; :Action text; ; if (condition) then (label) / elseif (condition) then (label) / else (label) / endif; while (condition) is (label) / endwhile (label); fork / fork again / end fork; note: text right after its step; # comments. A line outside the grammar is refused with its line number and the token, and nothing is drawn. When the user describes a process in words, write it in this grammar first and show it with the result. Files of large diagrams are kept for 1 hour so the download links work, then deleted.

Tools

2 advertised

make_activity_diagram — Make activity diagram
Advertised by the server during the last successful anonymous check.
Advertised read-only

Use this when the user wants a UML activity diagram or a process flowchart drawn from steps, for example "draw the checkout flow as an activity diagram" or "make a PDF of this process". Takes the diagram text in a line grammar: start / stop / end; :Action text; ; if (condition) then (label) ... elseif (condition) then (label) ... else (label) ... endif; while (condition) is (label) ... endwhile (label); fork ... fork again ... end fork; note: text (right after the step it belongs to); # comments. Labels are optional; a condition or label must not contain ( or ). When the user describes the process in words, write it in this grammar first. Returns counts, the steps in flow order with their block path, the links between them, the flow check (steps that are not reachable, empty branches), a check on the drawing, the PDF page count, an interactive diagram, and PDF, SVG and CSV downloads. Refuses a line outside the grammar with its line number and token. Up to 200 actions, 60 decisions, 6 fork branches, 6 nesting levels and 400 characters per line. Does not read repeat loops, switch, swimlanes or partitions. Download links of large diagrams expire after about 1 hour.

make_activity_diagram input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "diagram"
  ],
  "properties": {
    "title": {
      "type": "string",
      "maxLength": 400,
      "description": "Title printed on the diagram and used in file names, up to 80 characters, e.g. \"Order checkout\"."
    },
    "diagram": {
      "type": "string",
      "maxLength": 100000,
      "description": "The activity in this line grammar, one statement per line, up to 40,000 characters, 2,000 lines and 400 characters per line (comments included): start | stop | end | :Action text; | if (condition) then (label) ... elseif (condition) then (label) ... else (label) ... endif | while (condition) is (label) ... endwhile (label) | fork ... fork again ... end fork | note: text | # comment. Labels are optional; conditions and labels must not contain ( or ). Example: \"start\\n:Receive order;\\nif (in stock?) then (yes)\\n:Ship it;\\nelse (no)\\n:Refund;\\nendif\\nstop\"."
    },
    "page_size": {
      "enum": [
        "letter",
        "a4"
      ],
      "type": "string",
      "description": "PDF paper: letter (default) or a4. A wide diagram turns the page to landscape. Example: a4."
    }
  }
}
make_activity_diagram output schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "title",
    "counts",
    "nodes",
    "edges",
    "analysis",
    "pdf",
    "layout_check",
    "warnings",
    "downloads"
  ],
  "properties": {
    "pdf": {
      "type": "object",
      "propertyNames": {
        "type": "string"
      },
      "additionalProperties": {}
    },
    "edges": {
      "type": "array",
      "items": {
        "type": "object",
        "propertyNames": {
          "type": "string"
        },
        "additionalProperties": {}
      }
    },
    "nodes": {
      "type": "array",
      "items": {
        "type": "object",
        "propertyNames": {
          "type": "string"
        },
        "additionalProperties": {}
      }
    },
    "shown": {
      "type": "object",
      "propertyNames": {
        "type": "string"
      },
      "additionalProperties": {}
    },
    "title": {
      "type": "string"
    },
    "counts": {
      "type": "object",
      "required": [
        "actions",
        "decisions",
        "ifs",
        "loops",
        "forks",
        "starts",
        "stops",
        "ends",
        "notes",
        "max_nesting",
        "nodes",
        "edges"
      ],
      "properties": {
        "ifs": {
          "type": "number"
        },
        "ends": {
          "type": "number"
        },
        "edges": {
          "type": "number"
        },
        "forks": {
          "type": "number"
        },
        "loops": {
          "type": "number"
        },
        "nodes": {
          "type": "number"
        },
        "notes": {
          "type": "number"
        },
        "stops": {
          "type": "number"
        },
        "starts": {
          "type": "number"
        },
        "actions": {
          "type": "number"
        },
        "decisions": {
          "type": "number"
        },
        "max_nesting": {
          "type": "number"
        }
      },
      "additionalProperties": false
    },
    "analysis": {
      "type": "object",
      "required": [
        "unreachable",
        "empty_branches",
        "reach_from"
      ],
      "properties": {
        "reach_from": {
          "type": "string"
        },
        "unreachable": {
          "type": "array",
          "items": {
            "type": "string"
          }
        },
        "empty_branches": {
          "type": "array",
          "items": {
            "type": "object",
            "propertyNames": {
              "type": "string"
            },
            "additionalProperties": {}
          }
        }
      },
      "additionalProperties": false
    },
    "warnings": {
      "type": "array",
      "items": {
        "type": "string"
      }
    },
    "downloads": {
      "type": "object",
      "properties": {
        "csv": {
          "type": "string"
        },
        "pdf": {
          "type": "string"
        },
        "svg": {
          "type": "string"
        }
      },
      "additionalProperties": false
    },
    "layout_check": {
      "type": "object",
      "propertyNames": {
        "type": "string"
      },
      "additionalProperties": {}
    }
  },
  "additionalProperties": false
}
make_activity_diagram annotations
{
  "title": "Make activity diagram",
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}
check_activity_diagram — Check activity diagram text
Advertised by the server during the last successful anonymous check.
Advertised read-only

Use this when the user wants activity diagram text checked without a drawing, for example "is my flow valid?" or "which steps are not reachable?". Takes the same diagram text as make_activity_diagram. Returns ready true or false; when a line breaks the grammar or a block is not closed, the line number, the token and the reason; otherwise the counts, the steps with their block path, steps that are not reachable (found by a breadth-first search from the start), and empty branches. Does not draw the diagram or make files.

check_activity_diagram input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "diagram"
  ],
  "properties": {
    "diagram": {
      "type": "string",
      "maxLength": 100000,
      "description": "The activity in this line grammar, one statement per line, up to 40,000 characters, 2,000 lines and 400 characters per line (comments included): start | stop | end | :Action text; | if (condition) then (label) ... elseif (condition) then (label) ... else (label) ... endif | while (condition) is (label) ... endwhile (label) | fork ... fork again ... end fork | note: text | # comment. Labels are optional; conditions and labels must not contain ( or ). Example: \"start\\n:Receive order;\\nif (in stock?) then (yes)\\n:Ship it;\\nelse (no)\\n:Refund;\\nendif\\nstop\"."
    }
  }
}
check_activity_diagram output schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "ready",
    "nodes",
    "error",
    "grammar",
    "limits"
  ],
  "properties": {
    "error": {
      "anyOf": [
        {
          "type": "object",
          "propertyNames": {
            "type": "string"
          },
          "additionalProperties": {}
        },
        {
          "type": "null"
        }
      ]
    },
    "nodes": {
      "type": "array",
      "items": {
        "type": "object",
        "propertyNames": {
          "type": "string"
        },
        "additionalProperties": {}
      }
    },
    "ready": {
      "type": "boolean"
    },
    "shown": {
      "type": "object",
      "propertyNames": {
        "type": "string"
      },
      "additionalProperties": {}
    },
    "counts": {
      "type": "object",
      "required": [
        "actions",
        "decisions",
        "ifs",
        "loops",
        "forks",
        "starts",
        "stops",
        "ends",
        "notes",
        "max_nesting",
        "nodes",
        "edges"
      ],
      "properties": {
        "ifs": {
          "type": "number"
        },
        "ends": {
          "type": "number"
        },
        "edges": {
          "type": "number"
        },
        "forks": {
          "type": "number"
        },
        "loops": {
          "type": "number"
        },
        "nodes": {
          "type": "number"
        },
        "notes": {
          "type": "number"
        },
        "stops": {
          "type": "number"
        },
        "starts": {
          "type": "number"
        },
        "actions": {
          "type": "number"
        },
        "decisions": {
          "type": "number"
        },
        "max_nesting": {
          "type": "number"
        }
      },
      "additionalProperties": false
    },
    "limits": {
      "type": "object",
      "propertyNames": {
        "type": "string"
      },
      "additionalProperties": {}
    },
    "grammar": {
      "type": "array",
      "items": {
        "type": "string"
      }
    },
    "analysis": {
      "type": "object",
      "required": [
        "unreachable",
        "empty_branches",
        "reach_from"
      ],
      "properties": {
        "reach_from": {
          "type": "string"
        },
        "unreachable": {
          "type": "array",
          "items": {
            "type": "string"
          }
        },
        "empty_branches": {
          "type": "array",
          "items": {
            "type": "object",
            "propertyNames": {
              "type": "string"
            },
            "additionalProperties": {}
          }
        }
      },
      "additionalProperties": false
    }
  },
  "additionalProperties": false
}
check_activity_diagram annotations
{
  "title": "Check activity diagram text",
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}

Prompts

Not advertised

No prompt definitions available.

Resources

1 advertised

activity-diagram-widget — Zovo Activity Diagram view

Advertised by the server during the last successful anonymous check.

Interactive view for Zovo Activity Diagram.

activity-diagram-widget URI
ui://widget/activity-diagram-v1-1.0.0-ad6735ed426eaf82dfc1a7d7547b5b40c1e3d3fd7d107fc9dfe2e8b7ed2b25f5.html

MIME type: text/html;profile=mcp-app

activity-diagram-widget-legacy — Zovo Activity Diagram view (previous versions)

Advertised by the server during the last successful anonymous check.

activity-diagram-widget-legacy URI template
ui://widget/activity-diagram-{version}.html

MIME type: text/html;profile=mcp-app

30-day availability

Aggregated from read-only remote checks; this is not a tool-execution or security guarantee.

Successful checks
1 of 1 (100%)
Average latency
2031 ms
95th percentile latency
2031 ms

Maintenance history

Public check and source-refresh events. Editorial and ownership records remain private.

  • · probe · passed · 2031 ms · metadata changed · 2 tool(s), 1 resource(s), 1 resource template(s)

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers the remote server. Use --scope project to write .mcp.json for the repo.
Claude Code configuration
claude mcp add --transport http zovo-activity-diagram-mcp https://activity-diagram.zovo.one/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).
Codex configuration
codex mcp add zovo-activity-diagram-mcp --url https://activity-diagram.zovo.one/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable zovo-activity-diagram-mcp in your MCP settings.
Cursor configuration
{
  "mcpServers": {
    "zovo-activity-diagram-mcp": {
      "url": "https://activity-diagram.zovo.one/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure).
Cline configuration
{
  "mcpServers": {
    "zovo-activity-diagram-mcp": {
      "type": "streamableHttp",
      "url": "https://activity-diagram.zovo.one/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start zovo-activity-diagram-mcp and inspect its tools.
VS Code configuration
{
  "servers": {
    "zovo-activity-diagram-mcp": {
      "type": "http",
      "url": "https://activity-diagram.zovo.one/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.
Gemini CLI configuration
gemini mcp add --transport http zovo-activity-diagram-mcp https://activity-diagram.zovo.one/mcp

Claude Desktop

Open Claude Settings > Connectors > Add custom connector, enter this server URL and enable it for the conversation. This is a manual remote-connector handoff, not a desktop JSON configuration.
Claude Desktop configuration
https://activity-diagram.zovo.one/mcp

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.
Windsurf configuration
{
  "mcpServers": {
    "zovo-activity-diagram-mcp": {
      "serverUrl": "https://activity-diagram.zovo.one/mcp"
    }
  }
}

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