API catalog

10 JSON endpoints across 4 categories. Use them when you need exact JSON instead of spending LLM tokens on utility work. Type / to search. Click any tool for its schema, credit cost, and copy-paste snippets.

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Finance 3 Text 4 Hash & Checksum 2 Math 1

Finance 3 endpoints Full page →

Exact interest, mortgage, APY, and other money math.

Interest
Compound Interest Calculatorcompound-interest-calculator
Compound-interest formula with selectable compounding frequency.
2cr
Simple Interest Calculatorsimple-interest-calculator
Simple-interest formula: I = P * r * t.
2cr
Loans
Mortgage Calculatormortgage-calculator
Monthly payment, total interest, LTV, and optional amortization schedule.
5cr

Text 4 endpoints Full page →

Word / character / line counters, whitespace, case, encoding.

Analysis
Character Countercharacter-counter
Count characters, letters, digits, whitespace, and punctuation.
1cr
Line Counterline-counter
Count total / non-empty / empty lines and longest-line length.
1cr
Word Counterword-counter
Count words, characters, sentences, paragraphs, reading/speaking time, top words.
1cr
Whitespace
Remove Spacesremove-spaces
Strip whitespace: all, extra, leading, trailing, or per-line.
1cr

Hash & Checksum 2 endpoints Full page →

SHA, MD5, HMAC, and digest utilities with stable JSON output.

MD5 Hash Generatormd5-hash-generator
Generate an MD5 hex digest for checksum and legacy compatibility.
1cr
SHA-256 Hash Generatorsha256-hash-generator
Generate a SHA-256 hex digest of a UTF-8 string.
1cr

Math 1 endpoint Full page →

Percentage, unit conversion, geometry, and sequences.

Percentage Calculatorpercentage-calculator
Six percentage operations behind one endpoint, selected by mode.
1cr