Sindri

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Base URLhttps://ppu43fkyhimq5fiqpmo42eh5ri0yypid.lambda-url.us-east-1.on.aws

• POST/chemicalElementLookup$0.01Periodic table element lookup by symbol or atomic number, returning name, atomic mass, and category. Covers the most commonly referenced elements.
• POST/fatFireCalculator$0.01Fat FIRE calculator. Same year-by-year compound-growth simulation as the standard FIRE calculator, framed for a higher, more lifestyle-preserving retirement spending target.
• POST/savingsRateCalculator$0.01Savings rate calculator. Divides the gap between monthly take-home income and spending by income to produce your personal savings rate as a percentage.
• POST/urlDecode$0.01URL decoder API. Decodes percent-encoded URL text back to plain text.
• POST/base64Decode$0.01Base64 decoder API. Decodes a base64 string back to UTF-8 text instantly and correctly, avoiding the padding and charset errors LLMs make when decoding base64 by hand.
• POST/primeFactorize$0.01Prime factorization of an integer via trial division, returning the full list of prime factors (with repetition).
• POST/generatePassword$0.01Secure password generator API. Generates a cryptographically random password — true randomness an LLM cannot produce on its own. Accepts optional length (8-128), per-character-class toggles (uppercase/lowercase/numbers/symbols) with guaranteed inclusion, and a pronounceable easy-to-say mode.
• POST/bigNumberArithmetic$0.01Arbitrary-precision integer arithmetic (add, subtract, multiply, power) beyond IEEE-754 float precision, using native BigInt. Operands are passed as digit strings so precision is never lost in transit. For power, the combined magnitude (base digit count x exponent) is capped at 50000 to bound response size, in addition to the per-operand digit cap and exponent cap.
• POST/colorConvert$0.01Converts a color between hex, rgb, and hsl representations using exact arithmetic.
• POST/baristaFireCalculator$0.01Barista FIRE calculator. Simulates net worth growth through a full-time-saving phase and then a reduced-target phase funded partly by part-time/side income after quitting full-time work, until full financial independence is reached.
• POST/matrixOperations$0.01Matrix operations: multiply, transpose, determinant, and invert, for matrices up to 20x20. Uses the ml-matrix library's LU decomposition (LuDecomposition) for determinant and inversion, with a numerical near-singularity guard beyond the library's exact-singular check.
• POST/gasMileageSavingsCalculator$0.01Gas mileage savings calculator. Compares annual fuel cost between two gas-powered vehicles based on miles driven, gas price, and each vehicle's MPG, and computes the break-even point for any price premium of the more efficient vehicle.
• POST/compoundInterestCalculator$0.01Compound interest calculator. Projects the ending value of an investment given a starting principal, monthly contributions, and an annual interest rate, compounded monthly over a chosen number of years.
• POST/astronomyEphemeris$0.01Sunrise, sunset, solar noon, day length, and moon phase for a given latitude/longitude/date, computed via the suncalc library (standard solar/lunar position algorithms) — precise astronomical math an LLM cannot reliably compute mentally.
• POST/evaluateExpression$0.01Safe arithmetic expression evaluator. Parses and evaluates expressions with +, -, *, /, ^, and parentheses using a bounded-recursion parser (no eval/Function), avoiding the arithmetic slips an LLM makes on long expressions.
• POST/generateChecksumFormat$0.01Checksummed-identifier-format generator API. Generates a structurally valid isbn, upc, vin, or imei, each computed with its real check-digit algorithm. vin and imei take no arguments. Accepts optional locale (default en_US).
• POST/hsaGrowthCalculator$0.01HSA (Health Savings Account) growth calculator. Projects year-by-year account balance from a starting value, annual contributions, annual expense withdrawals, and an annual return rate.
• POST/houseHackingCalculator$0.01House hacking calculator. Nets rental income from other units/rooms against your mortgage payment and expenses, then adds back the equity you build via principal paydown and the market rent you avoid paying elsewhere, to compute the true monthly net-worth impact of living in and renting out part of a property.
• POST/teslaSavingsCalculator$0.01Tesla savings calculator. Compares annual electricity cost for a Tesla against annual gas cost for a comparable gas vehicle, accounting for free-charging usage, and computes break-even years, cost per full charge, and gas-price-equivalent effective MPG.
• POST/unitConvertScientific$0.01Scientific unit conversion for pressure, energy, and molarity using exact conversion factors.
• POST/generateSlug$0.01Slug generator API. Converts any text into a clean, URL-safe slug (lowercase, hyphen-separated, unicode-aware), handling punctuation and accented-character edge cases a naive regex misses.
• POST/getCurrentCryptoPrice$0.01Live cryptocurrency price API. Returns the current market price (in USD) of any cryptocurrency by ticker symbol (BTC, ETH, DOGE, etc.) — live market data an LLM cannot know on its own.
• POST/generateGeoCoordinate$0.01True-random-geo-coordinate generator API. Generates a bounded random latitude, longitude, or a coordinate near a given origin (via one of: latitude, longitude, nearbyGPSCoordinate). Accepts optional locale (default en_US). Numeric args are capped to +/-1e15; precision is capped to 0-20; origin must be a [latitude, longitude] pair.
• POST/generateUUID$0.01UUID generator API. Generates a random RFC 4122 version 4 UUID using a cryptographically secure source — not the pseudo-random, collision-prone IDs an LLM would invent. No input required.
• POST/keepingUpWithInflationCalculator$0.01Keeping up with inflation calculator. Computes the pre-tax raise needed under two scenarios — keeping the same dollar amount saved, or maintaining the same savings rate — after inflation raises your spending and a marginal tax rate reduces the raise itself.

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