For the complete documentation index, see llms.txt.

Miscellaneous API

3 endpoints — Same auth, same credit pool, same JSON envelope. Use them directly from apps, content sites, workflows, or agents without rebuilding formulas, validation, and docs for each tool.

Start free → View OpenAPI All categories

General Tools

Tire Size Calculatortire-size-calculator

Calculate tire sidewall, diameter, circumference, and revolutions per mile.

1cr · v2026-04-22

Student Calculators

Test Score Calculatortest-score-calculator

Convert earned and total test points into a percentage, letter grade, and GPA points.

1cr · v2026-04-22

Weighted Grade Calculatorweighted-grade-calculator

Calculate a weighted course grade from category weights and scores.

1cr · v2026-04-22