MCP servers from gumballtools.com

15 servers, 15 answering our latest check. Online first.

Equation Steps

Step-by-step solver for linear/quadratic equations in one variable, signs and ± always right.
equation-steps.gumballtools.com/api/mcp
● Online, checked 329 min ago

by gumballtools.com

ISO Week Number

ISO 8601 week numbers: date to week, week to date, weeks-per-year.
iso-week.gumballtools.com/api/mcp
● Online, checked 329 min ago

by gumballtools.com

Payload Validator

Validate JSON, YAML, XML and CSV with exact line/column errors and silent-corruption warnings.
payload-validator.gumballtools.com/api/mcp
● Online, checked 329 min ago

by gumballtools.com

Amortization Schedule

Row-by-row loan amortization schedules: monthly or daily accrual, extra principal, PMI, biweekly.
amortize.gumballtools.com/api/mcp
● Online, checked 329 min ago

by gumballtools.com

Project Gumball

One MCP server exposing every tool in the Gumball portfolio.
gumballtools.com/api/mcp
● Online, checked 329 min ago

by gumballtools.com

Words in Context

Words-in-context vocabulary practice questions with distractor explanations.
words-in-context.gumballtools.com/api/mcp
● Online, checked 329 min ago

by gumballtools.com

Timezone Truth

Convert times between IANA zones and detect skipped or ambiguous DST local times.
timezone-truth.gumballtools.com/api/mcp
● Online, checked 329 min ago

by gumballtools.com

Sports Rules

Work an offside call through IFAB Law 11 or NHL Rule 83, step by step.
sports-rules.gumballtools.com/api/mcp
● Online, checked 329 min ago

by gumballtools.com

Regex Explainer

Explain a regex in plain English and detect catastrophic backtracking risk.
regex-explainer.gumballtools.com/api/mcp
● Online, checked 329 min ago

by gumballtools.com

Penny Rounding

Round cash totals to the nearest nickel correctly — after tax, on the total, cash only.
penny-rounding.gumballtools.com/api/mcp
● Online, checked 329 min ago

by gumballtools.com

JSON to Types

Convert JSON samples into TypeScript interfaces and Zod schemas, with inference caveats.
json-to-types.gumballtools.com/api/mcp
● Online, checked 329 min ago

by gumballtools.com

Due Date

Estimate a due date from LMP, conception, or ultrasound, with ACOG redating rules.
due-date.gumballtools.com/api/mcp
● Online, checked 329 min ago

by gumballtools.com

Color Companion

Convert colours between hex, RGB, HSL, OKLCH and CMYK, and compute harmonies.
color-companion.gumballtools.com/api/mcp
● Online, checked 329 min ago

by gumballtools.com

Body Metrics

Convert height and weight, compute BMI, TDEE and protein targets with error bounds.
body-metrics.gumballtools.com/api/mcp
● Online, checked 329 min ago

by gumballtools.com

Check Digit Validator

Validates IBAN/ISBN/EAN/Luhn checksums and finds the one wrong digit
check-digit.gumballtools.com/api/mcp
● Online, checked 329 min ago

by gumballtools.com