Jackpot Calculator
Estimate US lottery taxes, compare cash and annuity, split pool prizes and calculate jackpot odds.
Should I use this
Quality & Safety
A
Findings (1)
- LOWTool 'calculate_lottery_payout' description lacks action verbin calculate_lottery_payout
Based on automated analysis of tool definitions and protocol compliance.
Context Cost
~1,511Tokens (tool definitions)
~3.4 KBTypical response size
Moderate attention impact (1.18% of 128k context)
This is the approximate number of tokens consumed each time the server's tools are loaded into a model's context. Higher counts reduce the attention available for other tasks.
Install
One-Click Install
Add this to your `claude_desktop_config.json` file:
{
"mcpServers": {
"jackpot-calculator": {
"url": "https://jackpot-calculator-mcp.jiankn.workers.dev/mcp"
}
}
}Remote endpoints
https://jackpot-calculator-mcp.jiankn.workers.dev/mcpstreamable-httpWhat it can do
Tool inventory
Tools (4)
🟢 Read-only🟡 Write🔴 Delete⚪ Unknown
🟢calculate_lottery_payout(prize, game, stateCode, locality, status, ...)
Estimate taxes and withholding on a known lottery cash prize. Input dollars; result integer cents. Bundled 2026 rules.
Input Schema
{
"type": "object",
"properties": {
"prize": {
"type": "number",
"exclusiveMinimum": 0,
"maximum": 1000000000000,
"description": "US dollars, not cents. Maximum $1 trillion."
},
"game": {
"default": "custom",
"type": "string",
"enum": [
"powerball",
"megaMillions",
"custom"
]
},
"stateCode": {
"type": "string",
"enum": [
"AK",
"AL",
"AR",
"AZ",
"CA",
"CO",
"CT",
"DC",
"DE",
"FL",
"GA",
"HI",
"IA",
"ID",
"IL",
"IN",
"KS",
"KY",
"LA",
"MA",
"MD",
"ME",
"MI",
"MN",
"MO",
"MS",
"MT",
"NC",
"ND",
"NE",
"NH",
"NJ",
"NM",
"NV",
"NY",
"OH",
"OK",
"OR",
"PA",
"RI",
"SC",
"SD",
"TN",
"TX",
"UT",
"VA",
"VT",
"WA",
"WI",
"WV",
"WY"
],
"description": "US residence and ticket-purchase state, two-letter code. Cross-state claims are not modeled."
},
"locality": {
"description": "Only valid with stateCode NY.",
"type": "string",
"enum": [
"NYC",
"YONKERS"
]
},
"status": {
"default": "single",
"type": "string",
"enum": [
"single",
"joint",
"headOfHousehold"
]
},
"otherIncome": {
"default": 0,
"description": "Other annual income in US dollars before the standard deduction.",
"type": "number",
"minimum": 0,
"maximum": 1000000000000
}
},
"required": [
"prize",
"stateCode"
],
"$schema": "https://json-schema.org/draft/2020-12/schema",
"additionalProperties": false
}🟢compare_lump_sum_annuity(jackpot, cashValue, game, stateCode, locality, ...)
Compare a published cash option with 30 growing annuity payments after taxes, including present value and break-even rate.
Input Schema
{
"type": "object",
"properties": {
"jackpot": {
"type": "number",
"exclusiveMinimum": 0,
"maximum": 1000000000000,
"description": "Advertised annuity total in US dollars."
},
"cashValue": {
"type": "number",
"exclusiveMinimum": 0,
"maximum": 1000000000000,
"description": "Published cash option in US dollars; do not infer it from a fixed ratio."
},
"game": {
"default": "custom",
"type": "string",
"enum": [
"powerball",
"megaMillions",
"custom"
]
},
"stateCode": {
"type": "string",
"enum": [
"AK",
"AL",
"AR",
"AZ",
"CA",
"CO",
"CT",
"DC",
"DE",
"FL",
"GA",
"HI",
"IA",
"ID",
"IL",
"IN",
"KS",
"KY",
"LA",
"MA",
"MD",
"ME",
"MI",
"MN",
"MO",
"MS",
"MT",
"NC",
"ND",
"NE",
"NH",
"NJ",
"NM",
"NV",
"NY",
"OH",
"OK",
"OR",
"PA",
"RI",
"SC",
"SD",
"TN",
"TX",
"UT",
"VA",
"VT",
"WA",
"WI",
"WV",
"WY"
],
"description": "US residence and ticket-purchase state, two-letter code. Cross-state claims are not modeled."
},
"locality": {
"description": "Only valid with stateCode NY.",
"type": "string",
"enum": [
"NYC",
"YONKERS"
]
},
"status": {
"default": "single",
"type": "string",
"enum": [
"single",
"joint",
"headOfHousehold"
]
},
"otherIncome": {
"default": 0,
"description": "Other annual income in US dollars before the standard deduction.",
"type": "number",
"minimum": 0,
"maximum": 1000000000000
},
"discountRate": {
"default": 0.04,
"description": "Annual discount rate as a fraction, e.g. 0.04 for 4%.",
"type": "number",
"minimum": 0,
"maximum": 1
},
"winners": {
"default": 1,
"description": "Number of jackpot-winning tickets sharing the prize.",
"type": "integer",
"minimum": 1,
"maximum": 10000
},
"sharePercent": {
"default": 100,
"description": "Your percentage of one winning ticket.",
"type": "number",
"exclusiveMinimum": 0,
"maximum": 100
}
},
"required": [
"jackpot",
"cashValue",
"stateCode"
],
"$schema": "https://json-schema.org/draft/2020-12/schema",
"additionalProperties": false
}🟢calculate_pool_share(prize, members, game, stateCode, locality, ...)
Estimate one equal member’s cash prize, taxes and withholding. Each member is assumed to have the specified tax profile.
Input Schema
{
"type": "object",
"properties": {
"prize": {
"type": "number",
"exclusiveMinimum": 0,
"maximum": 1000000000000,
"description": "Whole ticket cash prize in US dollars."
},
"members": {
"type": "integer",
"minimum": 2,
"maximum": 10000,
"description": "Equal owners of one ticket. Result assumes every member has the specified tax profile."
},
"game": {
"default": "custom",
"type": "string",
"enum": [
"powerball",
"megaMillions",
"custom"
]
},
"stateCode": {
"type": "string",
"enum": [
"AK",
"AL",
"AR",
"AZ",
"CA",
"CO",
"CT",
"DC",
"DE",
"FL",
"GA",
"HI",
"IA",
"ID",
"IL",
"IN",
"KS",
"KY",
"LA",
"MA",
"MD",
"ME",
"MI",
"MN",
"MO",
"MS",
"MT",
"NC",
"ND",
"NE",
"NH",
"NJ",
"NM",
"NV",
"NY",
"OH",
"OK",
"OR",
"PA",
"RI",
"SC",
"SD",
"TN",
"TX",
"UT",
"VA",
"VT",
"WA",
"WI",
"WV",
"WY"
],
"description": "US residence and ticket-purchase state, two-letter code. Cross-state claims are not modeled."
},
"locality": {
"description": "Only valid with stateCode NY.",
"type": "string",
"enum": [
"NYC",
"YONKERS"
]
},
"status": {
"default": "single",
"type": "string",
"enum": [
"single",
"joint",
"headOfHousehold"
]
},
"otherIncome": {
"default": 0,
"description": "Other annual income in US dollars before the standard deduction.",
"type": "number",
"minimum": 0,
"maximum": 1000000000000
}
},
"required": [
"prize",
"members",
"stateCode"
],
"$schema": "https://json-schema.org/draft/2020-12/schema",
"additionalProperties": false
}🟢calculate_lottery_odds(game, tickets, jackpotCash)
Calculate jackpot coverage for distinct combinations in one drawing and optional before-tax expected ticket return.
Input Schema
{
"type": "object",
"properties": {
"game": {
"type": "string",
"enum": [
"powerball",
"megaMillions"
]
},
"tickets": {
"default": 1,
"description": "Different number combinations in the SAME drawing; repeated combinations do not add coverage.",
"type": "integer",
"minimum": 1,
"maximum": 302575350
},
"jackpotCash": {
"description": "Optional jackpot cash option in US dollars, required to compute expected ticket return.",
"type": "number",
"exclusiveMinimum": 0,
"maximum": 1000000000000
}
},
"required": [
"game"
],
"$schema": "https://json-schema.org/draft/2020-12/schema",
"additionalProperties": false
}Community
Evidence
Recent observations
verifiedversion not recorded4 tools