Koskamo

Zovo Venn MCP

Compares 2 or 3 lists and draws a Venn diagram, with a CSV table of the region of each item. It finds which items are only in one list, in two lists or in all three, counts each region, and draws the items inside their region when up to 12 fit at a readable size.

Visit Zovo

Endpoint and access

No sign-in to connect and list tools. Individual tools may still need a vendor account, credentials, or permissions; check the documented prerequisites.

Zovo Venn MCP logo, by ZovoCommunity listingStreamable HTTPNo sign-inEndpoint checked 2026-11-08Published by Zovo
You need:No sign-in is needed.
MCP endpoint (Streamable HTTP)
https://venn-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

  • Compare two or three lists of items to find overlaps
  • Generate a Venn diagram visualization from named lists
  • Download results as vector SVG, PDF, or CSV

Source and maintenance

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

Protocol and capabilities

Server
venn-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 Venn compares 2 or 3 lists. make_venn draws a Venn diagram with each item in its region and gives SVG, PDF and CSV downloads; compare_lists returns the region table (only A, only B, A and B, ...) with counts and a CSV, without a diagram. Items are matched after Unicode and space clean-up, ignoring case unless case_sensitive is true. It does not read files or images. Lists are not kept after the call; the download files of large diagrams are stored for 1 hour and then deleted.

Tools

2 advertised

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

Use this when the user wants a Venn diagram of 2 or 3 lists or groups, for example "Venn diagram of these two customer lists" or "draw the overlap of skills for 3 candidates". Takes 2 or 3 named sets of items (up to 500 per set, 80 characters per item) or only region counts, a layout (symmetric, or proportional for 2 sets) and a case option. Returns the count of each region, which items are drawn, a check that each drawn label sits inside its region, an interactive diagram, and SVG, PDF and CSV downloads. Does not read files or images, and does not draw 4 or more sets. Lists are not kept after the call; download files of large diagrams are stored for 1 hour.

make_venn input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "properties": {
    "sets": {
      "type": "array",
      "items": {
        "type": "object",
        "propertyNames": {
          "type": "string"
        },
        "additionalProperties": {}
      },
      "maxItems": 10,
      "description": "2 or 3 named lists to compare. Each set: {\"name\":\"Team A\",\"items\":[\"Ann\",\"Bo\",\"Cy\"]}. Names up to 40 characters; up to 500 items per set, each up to 80 characters. Give this or set_names with region_counts."
    },
    "title": {
      "type": "string",
      "maxLength": 400,
      "description": "Diagram title, e.g. \"Skills of two candidates\". Up to 80 characters. Default: the set names joined with \"vs\"."
    },
    "layout": {
      "enum": [
        "symmetric",
        "proportional"
      ],
      "type": "string",
      "description": "symmetric (default): circles of equal size, areas not to scale. proportional: 2 sets only, both with at least one item, circle and overlap areas to scale with the counts."
    },
    "set_names": {
      "type": "array",
      "items": {
        "type": "string",
        "maxLength": 400
      },
      "maxItems": 10,
      "description": "Only with region_counts: the 2 or 3 set names in order a, b, c, e.g. [\"Email\",\"SMS\"]."
    },
    "region_counts": {
      "type": "object",
      "description": "Use when only the counts are known, not the items. Keys name one region each: 2 sets a, b, ab; 3 sets a, b, c, ab, ac, bc, abc (a = only the first set; ab = in the first and second set but not the third). Example: {\"a\":120,\"b\":80,\"ab\":45}.",
      "propertyNames": {
        "type": "string"
      },
      "additionalProperties": {}
    },
    "case_sensitive": {
      "type": "boolean",
      "description": "false (default): \"Apple\" and \"apple\" are the same item. true: case matters."
    }
  }
}
make_venn output schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "title",
    "layout",
    "mode",
    "set_count",
    "normalization",
    "sets",
    "regions",
    "union_count",
    "placement_check",
    "pdf",
    "warnings",
    "downloads"
  ],
  "properties": {
    "pdf": {
      "type": "object",
      "propertyNames": {
        "type": "string"
      },
      "additionalProperties": {}
    },
    "mode": {
      "type": "string"
    },
    "sets": {
      "type": "array",
      "items": {
        "type": "object",
        "propertyNames": {
          "type": "string"
        },
        "additionalProperties": {}
      }
    },
    "title": {
      "type": "string"
    },
    "layout": {
      "type": "string"
    },
    "regions": {
      "type": "array",
      "items": {
        "type": "object",
        "propertyNames": {
          "type": "string"
        },
        "additionalProperties": {}
      }
    },
    "warnings": {
      "type": "array",
      "items": {
        "type": "string"
      }
    },
    "downloads": {
      "type": "object",
      "properties": {
        "csv": {
          "type": "string"
        },
        "pdf": {
          "type": "string"
        },
        "svg": {
          "type": "string"
        }
      },
      "additionalProperties": false
    },
    "set_count": {
      "type": "number"
    },
    "union_count": {
      "type": "number"
    },
    "proportional": {
      "type": "object",
      "propertyNames": {
        "type": "string"
      },
      "additionalProperties": {}
    },
    "normalization": {
      "type": "string"
    },
    "preview_count": {
      "type": "object",
      "propertyNames": {
        "type": "string"
      },
      "additionalProperties": {}
    },
    "placement_check": {
      "type": "object",
      "propertyNames": {
        "type": "string"
      },
      "additionalProperties": {}
    }
  },
  "additionalProperties": false
}
make_venn annotations
{
  "title": "Make Venn diagram",
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}
compare_lists — Compare lists
Advertised by the server during the last successful anonymous check.
Advertised read-only

Use this when the user wants to know which items 2 or 3 lists share and which are unique, without a diagram, for example "which names are on both lists" or "compare these three guest lists". Takes 2 or 3 named lists (up to 500 items each, 80 characters per item) and a case option. Returns each region (only A, only B, A and B, ...) with its count and items, the overlap percentage for each pair, and a CSV with each item's region. Does not read files, does not fuzzy-match spellings, and does not draw a diagram.

compare_lists input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "sets"
  ],
  "properties": {
    "sets": {
      "type": "array",
      "items": {
        "type": "object",
        "propertyNames": {
          "type": "string"
        },
        "additionalProperties": {}
      },
      "maxItems": 10,
      "description": "2 or 3 named lists to compare. Each set: {\"name\":\"Team A\",\"items\":[\"Ann\",\"Bo\",\"Cy\"]}. Names up to 40 characters; up to 500 items per set, each up to 80 characters."
    },
    "case_sensitive": {
      "type": "boolean",
      "description": "false (default): \"Apple\" and \"apple\" are the same item. true: case matters."
    }
  }
}
compare_lists output schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "set_count",
    "normalization",
    "sets",
    "regions",
    "union_count",
    "pairs",
    "items_complete",
    "warnings",
    "downloads"
  ],
  "properties": {
    "sets": {
      "type": "array",
      "items": {
        "type": "object",
        "propertyNames": {
          "type": "string"
        },
        "additionalProperties": {}
      }
    },
    "pairs": {
      "type": "array",
      "items": {
        "type": "object",
        "propertyNames": {
          "type": "string"
        },
        "additionalProperties": {}
      }
    },
    "regions": {
      "type": "array",
      "items": {
        "type": "object",
        "propertyNames": {
          "type": "string"
        },
        "additionalProperties": {}
      }
    },
    "warnings": {
      "type": "array",
      "items": {
        "type": "string"
      }
    },
    "downloads": {
      "type": "object",
      "properties": {
        "csv": {
          "type": "string"
        }
      },
      "additionalProperties": false
    },
    "set_count": {
      "type": "number"
    },
    "union_count": {
      "type": "number"
    },
    "normalization": {
      "type": "string"
    },
    "items_complete": {
      "type": "boolean"
    }
  },
  "additionalProperties": false
}
compare_lists annotations
{
  "title": "Compare lists",
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}

Prompts

Not advertised

No prompt definitions available.

Resources

1 advertised

venn-diagram-widget — Zovo Venn view

Advertised by the server during the last successful anonymous check.

Interactive view for Zovo Venn.

venn-diagram-widget URI
ui://widget/venn-diagram-v1-1.0.0-98bdccab4cb5a20778d6df612ce180f7c0f27d813b5393b391df15ac30123233.html

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

venn-diagram-widget-legacy — Zovo Venn view (previous versions)

Advertised by the server during the last successful anonymous check.

venn-diagram-widget-legacy URI template
ui://widget/venn-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
1936 ms
95th percentile latency
1936 ms

Maintenance history

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

  • · probe · passed · 1936 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-venn-mcp https://venn-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-venn-mcp --url https://venn-diagram.zovo.one/mcp

Cursor

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

Cline

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

VS Code

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

Let your agent find its tools

Find servers like Zovo Venn MCP from your agent. Add Koskamo once to search the index for endpoints, access requirements, and client setup. Public discovery needs no key.

Connect Koskamo Explore workflows
See all 6,060