Koskamo

Zovo Big Five Test MCP

Provides an interactive Big Five personality test using the public-domain IPIP 50-item markers. It scores traits like Extraversion and Conscientiousness, reports percentiles against 600,000+ volunteers, and generates shareable comparison cards for users.

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Endpoint and access

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Zovo Big Five Test MCP logo, by ZovoCommunity listingStreamable HTTPNo sign-inEndpoint checked 2026-11-01Published by Zovo
MCP endpoint (Streamable HTTP)
https://personality-test.zovo.one/mcp
Vendor documentation

What you can do with it

  • Take a 50-item Big Five personality test
  • Score raw results for five personality traits
  • Generate a share card with test results
  • Compare Big Five scores between two people

Source and maintenance

Community listingRegistry 1.0.0
mcp-registry: io.github.theluckystrike/personality-test@1.0.0Project website

Protocol and capabilities

Server
personality-test 1.0.0
MCP protocol
2025-06-18
Tools
3 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 Big Five Test administers the public-domain IPIP 50-item Big-Five Factor Markers (Goldberg, 1992) and scores it exactly. Call show_personality_test to let the user take the test in the widget; call calculate_personality_scores when you have all 50 answers (1-5, item order); call compare_personality_scores to compare two people's raw scores. Results are descriptive self-report scores, never a diagnosis, mental-health assessment, or hiring tool. Do not infer health conditions from the scores.

Tools

3 advertised

calculate_personality_scores — Calculate Big Five scores
Advertised by the server during the last successful anonymous check.
Advertised read-only

Use this when the user has answered all 50 items of the IPIP Big-Five Factor Markers test (answers 1-5 in item order) and wants their personality test scores. Returns raw scores (10-50) for Extraversion, Agreeableness, Conscientiousness, Emotional Stability and Intellect/Imagination, an approximate percentile, a low/average/high band with a plain-language description, a share card (SVG) and a share page link. Reverse-keyed items are scored automatically. Does not diagnose anything and is not for hiring decisions. Do not use for other questionnaires (MBTI, DISC, Enneagram) or with invented answers.

calculate_personality_scores input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "properties": {
    "name": {
      "type": "string",
      "maxLength": 500,
      "description": "Optional first name or nickname for the share card, e.g. Alex. Leave empty for an anonymous card."
    },
    "answers": {
      "anyOf": [
        {
          "type": "array",
          "items": {
            "anyOf": [
              {
                "type": "number"
              },
              {
                "type": "string",
                "maxLength": 40
              },
              {
                "type": "null"
              }
            ]
          },
          "maxItems": 100
        },
        {
          "type": "string",
          "maxLength": 2000
        }
      ],
      "description": "Required. The 50 answers in item order, each 1-5 (1 very inaccurate ... 5 very accurate), e.g. [4,2,4,2,4,2,5,2,4,2, ...]. A string like \"4,2,4,2,...\", \"4242...\" or a numbered list \"1: 4, 2: 2, ...\" also works. Use null for an unanswered item."
    }
  }
}
calculate_personality_scores output schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "domains",
    "norm_note",
    "disclaimer",
    "name",
    "downloads"
  ],
  "properties": {
    "name": {
      "type": "string"
    },
    "domains": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "key",
          "name",
          "score",
          "percentile",
          "band",
          "description"
        ],
        "properties": {
          "key": {
            "type": "string"
          },
          "band": {
            "type": "string"
          },
          "name": {
            "type": "string"
          },
          "score": {
            "type": "number"
          },
          "percentile": {
            "type": "number"
          },
          "description": {
            "type": "string"
          }
        },
        "additionalProperties": false
      }
    },
    "downloads": {
      "type": "object",
      "required": [
        "card",
        "page"
      ],
      "properties": {
        "card": {
          "type": "string"
        },
        "page": {
          "type": "string"
        }
      },
      "additionalProperties": false
    },
    "norm_note": {
      "type": "string"
    },
    "disclaimer": {
      "type": "string"
    }
  },
  "additionalProperties": false
}
calculate_personality_scores annotations
{
  "title": "Calculate Big Five scores",
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}
show_personality_test — Show Big Five personality test
Advertised by the server during the last successful anonymous check.
Advertised read-only

Use this when the user wants to take a personality test, a Big Five (five-factor, OCEAN) test, or a personality test for self-reflection, students, teens or couples. Shows the 50 public-domain IPIP Big-Five Factor Marker items in an interactive widget (one at a time, progress bar, back button); answers stay in the widget until the user submits, then they are scored with calculate_personality_scores. Also returns the item list and a browser link to take the same test. Does not score anything by itself. Do not use for MBTI/16-type, DISC or Enneagram tests, or to screen job candidates.

show_personality_test input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "properties": {
    "name": {
      "type": "string",
      "maxLength": 500,
      "description": "Optional first name or nickname to prefill for the result card, e.g. Alex."
    }
  }
}
show_personality_test output schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "instructions",
    "scale",
    "items",
    "name",
    "test_page",
    "disclaimer"
  ],
  "properties": {
    "name": {
      "type": "string"
    },
    "items": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "n",
          "text"
        ],
        "properties": {
          "n": {
            "type": "number"
          },
          "text": {
            "type": "string"
          }
        },
        "additionalProperties": false
      }
    },
    "scale": {
      "type": "array",
      "items": {
        "type": "string"
      }
    },
    "test_page": {
      "type": "string"
    },
    "disclaimer": {
      "type": "string"
    },
    "instructions": {
      "type": "string"
    }
  },
  "additionalProperties": false
}
show_personality_test annotations
{
  "title": "Show Big Five personality test",
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}
compare_personality_scores — Compare two Big Five profiles
Advertised by the server during the last successful anonymous check.
Advertised read-only

Use this when the user wants to compare two people's Big Five personality test results, e.g. friends, partners or siblings who both took the 50-item test. Takes each person's five raw scores (10-50) and returns per-trait differences (similar when 3 points or fewer apart), each person's percentile, a comparison card (SVG) and a comparison page. Describes differences only; it does not rate compatibility, predict relationships, or judge who is better. Do not use for hiring or team selection.

compare_personality_scores input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "person_a",
    "person_b"
  ],
  "properties": {
    "person_a": {
      "type": "object",
      "properties": {
        "name": {
          "type": "string",
          "maxLength": 500,
          "description": "Optional first name or nickname shown on the card, e.g. Alex."
        },
        "extraversion": {
          "anyOf": [
            {
              "type": "number"
            },
            {
              "type": "string",
              "maxLength": 12
            }
          ],
          "description": "Extraversion raw score, whole number 10-50 (required), e.g. 34."
        },
        "agreeableness": {
          "anyOf": [
            {
              "type": "number"
            },
            {
              "type": "string",
              "maxLength": 12
            }
          ],
          "description": "Agreeableness raw score, whole number 10-50 (required), e.g. 41."
        },
        "conscientiousness": {
          "anyOf": [
            {
              "type": "number"
            },
            {
              "type": "string",
              "maxLength": 12
            }
          ],
          "description": "Conscientiousness raw score, whole number 10-50 (required), e.g. 29."
        },
        "emotional_stability": {
          "anyOf": [
            {
              "type": "number"
            },
            {
              "type": "string",
              "maxLength": 12
            }
          ],
          "description": "Emotional Stability raw score, whole number 10-50 (required), e.g. 30."
        },
        "intellect_imagination": {
          "anyOf": [
            {
              "type": "number"
            },
            {
              "type": "string",
              "maxLength": 12
            }
          ],
          "description": "Intellect/Imagination raw score, whole number 10-50 (required), e.g. 38."
        }
      },
      "description": "First person's raw scores, e.g. {\"name\":\"Alex\",\"extraversion\":34,\"agreeableness\":41,\"conscientiousness\":29,\"emotional_stability\":30,\"intellect_imagination\":38}."
    },
    "person_b": {
      "type": "object",
      "properties": {
        "name": {
          "type": "string",
          "maxLength": 500,
          "description": "Optional first name or nickname shown on the card, e.g. Alex."
        },
        "extraversion": {
          "anyOf": [
            {
              "type": "number"
            },
            {
              "type": "string",
              "maxLength": 12
            }
          ],
          "description": "Extraversion raw score, whole number 10-50 (required), e.g. 34."
        },
        "agreeableness": {
          "anyOf": [
            {
              "type": "number"
            },
            {
              "type": "string",
              "maxLength": 12
            }
          ],
          "description": "Agreeableness raw score, whole number 10-50 (required), e.g. 41."
        },
        "conscientiousness": {
          "anyOf": [
            {
              "type": "number"
            },
            {
              "type": "string",
              "maxLength": 12
            }
          ],
          "description": "Conscientiousness raw score, whole number 10-50 (required), e.g. 29."
        },
        "emotional_stability": {
          "anyOf": [
            {
              "type": "number"
            },
            {
              "type": "string",
              "maxLength": 12
            }
          ],
          "description": "Emotional Stability raw score, whole number 10-50 (required), e.g. 30."
        },
        "intellect_imagination": {
          "anyOf": [
            {
              "type": "number"
            },
            {
              "type": "string",
              "maxLength": 12
            }
          ],
          "description": "Intellect/Imagination raw score, whole number 10-50 (required), e.g. 38."
        }
      },
      "description": "Second person's raw scores, e.g. {\"name\":\"Sam\",\"extraversion\":22,\"agreeableness\":38,\"conscientiousness\":44,\"emotional_stability\":35,\"intellect_imagination\":31}."
    }
  }
}
compare_personality_scores output schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "person_a",
    "person_b",
    "differences",
    "similar_count",
    "largest_difference",
    "note",
    "downloads"
  ],
  "properties": {
    "note": {
      "type": "string"
    },
    "person_a": {
      "type": "object",
      "required": [
        "name",
        "domains"
      ],
      "properties": {
        "name": {
          "type": "string"
        },
        "domains": {
          "type": "array",
          "items": {
            "type": "object",
            "required": [
              "key",
              "name",
              "score",
              "percentile",
              "band",
              "description"
            ],
            "properties": {
              "key": {
                "type": "string"
              },
              "band": {
                "type": "string"
              },
              "name": {
                "type": "string"
              },
              "score": {
                "type": "number"
              },
              "percentile": {
                "type": "number"
              },
              "description": {
                "type": "string"
              }
            },
            "additionalProperties": false
          }
        }
      },
      "additionalProperties": false
    },
    "person_b": {
      "type": "object",
      "required": [
        "name",
        "domains"
      ],
      "properties": {
        "name": {
          "type": "string"
        },
        "domains": {
          "type": "array",
          "items": {
            "type": "object",
            "required": [
              "key",
              "name",
              "score",
              "percentile",
              "band",
              "description"
            ],
            "properties": {
              "key": {
                "type": "string"
              },
              "band": {
                "type": "string"
              },
              "name": {
                "type": "string"
              },
              "score": {
                "type": "number"
              },
              "percentile": {
                "type": "number"
              },
              "description": {
                "type": "string"
              }
            },
            "additionalProperties": false
          }
        }
      },
      "additionalProperties": false
    },
    "downloads": {
      "type": "object",
      "required": [
        "card",
        "page"
      ],
      "properties": {
        "card": {
          "type": "string"
        },
        "page": {
          "type": "string"
        }
      },
      "additionalProperties": false
    },
    "differences": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "key",
          "name",
          "a",
          "b",
          "difference",
          "summary"
        ],
        "properties": {
          "a": {
            "type": "number"
          },
          "b": {
            "type": "number"
          },
          "key": {
            "type": "string"
          },
          "name": {
            "type": "string"
          },
          "summary": {
            "type": "string"
          },
          "difference": {
            "type": "number"
          }
        },
        "additionalProperties": false
      }
    },
    "similar_count": {
      "type": "number"
    },
    "largest_difference": {
      "type": "string"
    }
  },
  "additionalProperties": false
}
compare_personality_scores annotations
{
  "title": "Compare two Big Five profiles",
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}

Prompts

Not advertised

No prompt definitions available.

Resources

1 advertised

personality-test-widget — Zovo Big Five Test view

Advertised by the server during the last successful anonymous check.

Interactive view for Zovo Big Five Test.

personality-test-widget URI
ui://widget/personality-test-v1-1.0.0-be5669bf01d2e705689b1920bc2929d4e21a8c42a6a6bfe0307dc186bbe56bbe.html

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

personality-test-widget-legacy — Zovo Big Five Test view (previous versions)

Advertised by the server during the last successful anonymous check.

personality-test-widget-legacy URI template
ui://widget/personality-test-{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
325 ms
95th percentile latency
325 ms

Maintenance history

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

  • · probe · passed · 325 ms · metadata changed · 3 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-big-five-test-mcp https://personality-test.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-big-five-test-mcp --url https://personality-test.zovo.one/mcp

Cursor

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

Cline

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

VS Code

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

Claude Desktop

Merge this into claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\), then restart Claude Desktop.
Claude Desktop configuration
{
  "mcpServers": {
    "zovo-big-five-test-mcp": {
      "url": "https://personality-test.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-big-five-test-mcp": {
      "serverUrl": "https://personality-test.zovo.one/mcp"
    }
  }
}

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