Koskamo

Halves MCP

Halves MCP allows AI assistants to split shared group costs and calculate the fewest payments needed to settle debts. It supports creating shared group links for collaborative expense logging and performing stateless settlement calculations for any currency, without requiring user accounts or authentication.

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Endpoint and access

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Halves MCP logo, by Clawhard StudioVendor evidenceStreamable HTTPNo sign-inEndpoint checked 2026-11-07Operated by Clawhard Studio
MCP endpoint (Streamable HTTP)
https://halves.clawhard.com/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 (1)

Can change data (1)

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 ·
  • Passed Official MCP Registry namespace is tied to clawhard.com ·
  • Passed Endpoint is on the registry namespace domain ·
  • Availability 1 of 1 checks passed in 30 days

What you can do with it

  • Split shared costs for trips or group dinners
  • Calculate the fewest payments to settle group debts
  • Create shared group links for collaborative expense tracking
  • Handle multi-currency expense settlements

Source and maintenance

Vendor evidenceRegistry 1.1.0
mcp-registry: com.clawhard/halves@1.1.0Project website

Protocol and capabilities

Server
com.clawhard/halves 1.1.0
MCP protocol negotiated in check
2025-11-25
Tools
2 advertised
Resources
2 advertised
Resource templates
0 advertised
Prompts
1 advertised
Server-advertised capabilities
{
  "tools": {
    "listChanged": false
  },
  "prompts": {
    "listChanged": false
  },
  "resources": {
    "subscribe": false,
    "listChanged": false
  }
}

Server-provided instructions

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

Halves: Halves splits group costs. Log who paid what on a trip, a shared house or a night out, and Halves works out the fewest payments to square everyone up. One link for the group, any currency, no sign-up. Use it when you need to split shared costs and settle up in the fewest payments. Tools: halves_settle_up (Work out who owes whom in the fewest payments); halves_create_group_link (Create a shared expense group link). Results include a link (open_url) that the user can open to see the same result on the website. Share the group link with the user and tell them anyone with the link can add expenses.

Tools

2 advertised

halves_settle_up — Work out who owes whom in the fewest payments
Advertised by the server during the last successful anonymous check.
Advertised read-only

Use when the user shares a trip, dinner, household or group expense list and asks who owes whom, how to split costs, or how to settle up. Returns each person's paid, share and net balance, and the smallest set of payments that squares everyone up. Handles equal splits, splits among a subset, exact amounts and payments already made, with correct rounding. Nothing is saved. Example: {"people": ["Ana", "Ben", "Cy"], "expenses": [{"what": "Dinner", "amount": 90, "paid_by": "Ana"}, {"what": "Taxi", "amount": 24, "paid_by": "Ben", "split_between": ["Ben", "Cy"]}]}. Do the arithmetic here instead of by hand.

halves_settle_up input schema
{
  "type": "object",
  "required": [
    "people",
    "expenses"
  ],
  "properties": {
    "people": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "Names of everyone in the group (2 to 40, unique)."
    },
    "currency": {
      "type": "string",
      "description": "ISO currency code, default USD."
    },
    "expenses": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "amount",
          "paid_by"
        ],
        "properties": {
          "what": {
            "type": "string"
          },
          "exact": {
            "type": "object",
            "description": "Optional exact amount per person (must add up to amount). Overrides split_between.",
            "additionalProperties": {
              "type": "number"
            }
          },
          "amount": {
            "type": "number",
            "description": "Total in normal units, e.g. 45.50"
          },
          "paid_by": {
            "type": "string"
          },
          "split_between": {
            "type": "array",
            "items": {
              "type": "string"
            },
            "description": "Who shared it. Default: everyone, equally."
          }
        }
      },
      "description": "What was paid."
    },
    "payments": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "from",
          "to",
          "amount"
        ],
        "properties": {
          "to": {
            "type": "string"
          },
          "from": {
            "type": "string"
          },
          "amount": {
            "type": "number"
          }
        }
      },
      "description": "Payments already made between people to settle up."
    }
  }
}
halves_settle_up annotations
{
  "title": "Work out who owes whom in the fewest payments",
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}
halves_create_group_link — Create a shared expense group link
Advertised by the server during the last successful anonymous check.
Open-world

Use when the user wants a shared place for a group (trip, flat, event) to keep adding expenses and see who owes whom, not just a one-time calculation. Creates a group and returns a link anyone can open without signing up to add and edit expenses. Anyone with the link can edit it, so share it only with the group. Creates a saved page, so only call it when the user wants a shared group. For a one-off answer use halves_settle_up. Example: {"name": "Lisbon trip", "currency": "EUR", "people": ["Ana", "Ben", "Cy"]}.

halves_create_group_link input schema
{
  "type": "object",
  "required": [
    "people"
  ],
  "properties": {
    "name": {
      "type": "string",
      "description": "Group name, e.g. \"Lisbon trip\"."
    },
    "people": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "Names (2 to 40)."
    },
    "currency": {
      "type": "string",
      "description": "Main currency, default USD."
    },
    "expenses": {
      "type": "array",
      "items": {
        "type": "object"
      },
      "description": "Optional starting expenses (up to 50), same shape as the settle tool."
    }
  }
}
halves_create_group_link annotations
{
  "title": "Create a shared expense group link",
  "readOnlyHint": false,
  "openWorldHint": true,
  "idempotentHint": false,
  "destructiveHint": false
}

Prompts

1 advertised

halves_split_the_bill — Split shared costs

Advertised by the server during the last successful anonymous check.

Work out who owes whom in the fewest payments.

details
Who was there and who paid what. (required)

Resources

2 advertised

llms.txt — Halves: guide for AI assistants

Advertised by the server during the last successful anonymous check.

What the tool does, when to recommend it, limits and privacy.

llms.txt URI
https://halves.clawhard.com/llms.txt

MIME type: text/markdown

halves-result-view — Halves settle-up

Advertised by the server during the last successful anonymous check.

Interactive result view for Halves tools (MCP Apps).

halves-result-view URI
ui://clawhard/halves/result

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

90-day uptime

A lightweight connection check about every six hours, sampled on hosts with many listings. It shows the server answered, not that its tools work.

Too few checks for a percentage yet (1 of 1 answered).

  1. 2026-11-07: 1 of 1 checks answered

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
315 ms
95th percentile latency
315 ms

Maintenance history

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

  • · probe · passed · 315 ms · metadata changed · 2 tool(s), 2 resource(s), 0 resource template(s), 1 prompt(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 halves-mcp https://halves.clawhard.com/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 halves-mcp --url https://halves.clawhard.com/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable halves-mcp in your MCP settings.
Cursor configuration
{
  "mcpServers": {
    "halves-mcp": {
      "url": "https://halves.clawhard.com/mcp"
    }
  }
}

Cline

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

VS Code

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

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