# Services from utils.kagurazaka.dev on Zero

> utils.kagurazaka.dev serves 15 paid API services for AI agents, indexed by Zero. Each is callable per call with payment handled by Zero.

Canonical page: https://www.zero.xyz/host/utils.kagurazaka.dev
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/utils.kagurazaka.dev/health.json

## Services

- [x402 Utils – Arithmetic Expression Evaluator](https://www.zero.xyz/c/x402-utils-arithmetic-expression-evaluator-f4f8e25d/llms.txt): $0.001/call via x402. Evaluates arithmetic expressions with 64 significant digits of precision, supporting operators, functions (sqrt, log, trig), constants, units, and statistics
- [x402 Utils – Date Arithmetic & Difference Calculator](https://www.zero.xyz/c/x402-utils-date-arithmetic-difference-calculator-d8790bb7/llms.txt): $0.001/call via x402. Add or subtract ISO 8601 durations to a date, or compute the difference between two dates in days, weeks, months, years, seconds, and business days (with country-specific public holidays).
- [x402 Utils – Public Holidays by Country](https://www.zero.xyz/c/x402-utils-public-holidays-by-country-0a8439fb/llms.txt): $0.001/call via x402. Returns all holidays for a given country (and optionally a state/region) in a specified year, including each holiday's date, name, and type (public, bank, school, optional, observance).
- [x402 Utils – Phone Number Validation & Formatting](https://www.zero.xyz/c/x402-utils-phone-number-validation-formatting-56ad2801/llms.txt): $0.001/call via x402. Validates a phone number, identifies its country and line type, and returns E.164, international, and national formats using libphonenumber metadata.
- [x402 Utils – Time Zone Lookup](https://www.zero.xyz/c/x402-utils-time-zone-lookup-91aa2b02/llms.txt): $0.001/call via x402. Returns the current or specified time in one or more IANA time zones, including UTC offset, abbreviation, DST status, and weekday.
- [x402 Utils – Regex Match & Replace (RE2)](https://www.zero.xyz/c/x402-utils-regex-match-replace-re2-3bd25ca4/llms.txt): $0.001/call via x402. Run an RE2 regular expression on text, returning all matches with positions and capture groups, plus an optional replacement applied to the text.
- [x402 Utils – Cron Expression Explainer](https://www.zero.xyz/c/x402-utils-cron-expression-explainer-1ec920a5/llms.txt): $0.001/call via x402. Parses a cron expression (5 or 6 fields, with ranges, steps, L, W, #) into plain English and returns its next N scheduled run times in a specified time zone.
- [x402 Utils – Unit Converter](https://www.zero.xyz/c/x402-utils-unit-converter-31a779da/llms.txt): $0.001/call via x402. Converts a numeric value from one physical or digital unit to another (e.g. miles to kilometres, Fahrenheit to Celsius, GB to MiB) using the mathjs unit system.
- [x402 Utils Token Counter](https://www.zero.xyz/c/x402-utils-token-counter-cdbae2a6/llms.txt): $0.001/call via x402. Count tokens, characters, words, and lines in a text string for OpenAI tokenization encodings (o200k_base for GPT-4o+, cl100k_base for GPT-4)
- [x402 Utils – Random ID Generator](https://www.zero.xyz/c/x402-utils-random-id-generator-238f4e53/llms.txt): $0.001/call via x402. Generates cryptographically random IDs in UUID v4, UUID v7 (time-ordered), ULID, or nanoid format, returning up to 100 at a time.
- [x402 Utils – JWT Decoder](https://www.zero.xyz/c/x402-utils-jwt-decoder-25372b10/llms.txt): $0.001/call via x402. Decodes a JWT's header and claims, returning the algorithm, payload, expiry timestamp, and whether the token has already expired — without verifying the signature.
- [x402 Utils – Text Diff](https://www.zero.xyz/c/x402-utils-text-diff-31c30642/llms.txt): $0.001/call via x402. Compares two texts by lines, words, or characters and returns added/removed counts, a list of changes, and a unified diff.
- [x402 Utils — Encode/Decode Text](https://www.zero.xyz/c/x402-utils-encode-decode-text-2920b7ac/llms.txt): $0.001/call via x402. Encode or decode text using base64, base64url, hex, URL (percent) encoding, or HTML escaping.
- [x402 Utils – Cryptographic Hash](https://www.zero.xyz/c/x402-utils-cryptographic-hash-85505a00/llms.txt): $0.001/call via x402. Computes MD5, SHA-1, SHA-256, SHA-512, SHA3-256, and Keccak-256 hashes of text or binary data (as UTF-8, hex, or base64), returning results in both hex and base64 encodings.
- [x402 Utils – JSON Schema Validator](https://www.zero.xyz/c/x402-utils-json-schema-validator-687d8d73/llms.txt): $0.001/call via x402. Validates a JSON value against a JSON Schema (draft-07 / 2019-09) and returns a list of every validation error with its path and keyword

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

- [Zero catalog index](https://www.zero.xyz/llms.txt)