MCP server

Jackpot Calculator

io.github.jiankn/jackpot-calculator

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

Estimate US lottery taxes, compare cash and annuity, split pool prizes and calculate jackpot odds.

Working at last checkAbout 1,556 tokens per request once connected4 tools

https://jackpot-calculator-mcp.jiankn.workers.dev/mcp

At a glance

Type: MCP server
Publisher: Not verified
Status: Working at last check
Tools: 4
Token cost: About 1,556 tokens per request
Sets up in: Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok
Last checked: 26 Oct 2026, 08:29 UTC

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http jackpot-calculator https://jackpot-calculator-mcp.jiankn.workers.dev/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.jackpot-calculator]
url = "https://jackpot-calculator-mcp.jiankn.workers.dev/mcp"

Gemini CLI

{"mcpServers":{"jackpot-calculator":{"httpUrl":"https://jackpot-calculator-mcp.jiankn.workers.dev/mcp"}}}

Cursor

{"mcpServers":{"jackpot-calculator":{"url":"https://jackpot-calculator-mcp.jiankn.workers.dev/mcp"}}}

VS Code

{"servers":{"jackpot-calculator":{"type":"http","url":"https://jackpot-calculator-mcp.jiankn.workers.dev/mcp"}}}

Antigravity

agy mcp add jackpot-calculator https://jackpot-calculator-mcp.jiankn.workers.dev/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"jackpot-calculator","server_url":"https://jackpot-calculator-mcp.jiankn.workers.dev/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"jackpot-calculator","server_url":"https://jackpot-calculator-mcp.jiankn.workers.dev/mcp"}

calculate_lottery_odds ~213 tokens
Calculate jackpot coverage for distinct combinations in one drawing and optional before-tax expected ticket return.
calculate_lottery_payout Moves money · ~375 tokens
Estimate taxes and withholding on a known lottery cash prize. Input dollars; result integer cents. Bundled 2026 rules.
calculate_pool_share ~422 tokens
Estimate one equal member’s cash prize, taxes and withholding. Each member is assumed to have the specified tax profile.
compare_lump_sum_annuity ~546 tokens
Compare a published cash option with 30 growing annuity payments after taxes, including present value and break-even rate.

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