MCP servers in com.gumballtools

Row-by-row loan amortization schedules: monthly or daily accrual, extra principal, PMI, biweekly.

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Convert height and weight, compute BMI, TDEE and protein targets with error bounds.

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Validates IBAN/ISBN/EAN/Luhn checksums and finds the one wrong digit

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Convert colours between hex, RGB, HSL, OKLCH and CMYK, and compute harmonies.

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Estimate a due date from LMP, conception, or ultrasound, with ACOG redating rules.

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Step-by-step solver for linear/quadratic equations in one variable, signs and ± always right.

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ISO 8601 week numbers: date to week, week to date, weeks-per-year.

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Convert JSON samples into TypeScript interfaces and Zod schemas, with inference caveats.

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Validate JSON, YAML, XML and CSV with exact line/column errors and silent-corruption warnings.

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Round cash totals to the nearest nickel correctly — after tax, on the total, cash only.

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One MCP server exposing every tool in the Gumball portfolio.

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Explain a regex in plain English and detect catastrophic backtracking risk.

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Work an offside call through IFAB Law 11 or NHL Rule 83, step by step.

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Convert times between IANA zones and detect skipped or ambiguous DST local times.

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Words-in-context vocabulary practice questions with distractor explanations.

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