APIShed

The 52 tools it listed

"Read only" and "Changes data" are the server's own marks. Underlined parameters are required.

1. color_contrast

   Computes the WCAG 2.1 contrast ratio between two hex colors. Alpha, if present, is composited over white first.

   colorA colorB

2. color_convert

   Converts a color between hex, rgb, hsl, and hsv. value's shape depends on from/to: a string for hex, an object ({r,g,b,a?} etc.) otherwise.

   from to value

3. csv_from_json

   Converts JSON records to CSV text. columns is the explicit, ordered header — JSON object key order can't be relied on to infer it.

   columns records delimiter

4. csv_parse

   Parses CSV text into rows of string fields (no type guessing). Ragged rows are tolerated — use csv_validate to detect them.

   text delimiter

5. csv_stats

   Parses CSV text (header row required) and reports per-column non-empty/empty value counts across the data rows. No numeric aggregation.

   text delimiter

6. csv_to_json

   Converts CSV text to JSON: header=true (default) returns one object per data row keyed by the header row; header=false returns raw rows. Every value is a string.

   text delimiter header

7. csv_validate

   Reports whether CSV text is structurally well-formed: every row has the same field count as the first.

   text delimiter

8. datemath_add

   Adds years/months/days to date. years/months are applied together with end-of-month clamping — e.g. 2026-01-31 + 1 month = 2026-02-28, not an overflowed 2026-03-03. days is then applied as plain calendar-day arithmetic.

   date years months days

9. datemath_age

   Age in whole years as of asOf (optional, defaults to the current UTC date). A Feb-29 birthDate is treated as falling on March 1 in a non-leap asOf year.

   birthDate asOf

10. datemath_businessdays

    Counts days in [from, to] (inclusive on both ends) whose weekday is in weekdays (default mon-fri) and which aren't in holidays.

    from to weekdays holidays

11. datemath_dayofweek

    Day of the week for date: both the weekday name and its ISO 8601 weekday number (1=Monday..7=Sunday).

    date

12. datemath_diff

    Day difference between two YYYY-MM-DD dates: to minus from, in whole days. Negative if to is before from.

    from to

13. datemath_leapyear

    Checks whether year is a leap year in the Gregorian calendar.

    year

14. datetime_now

    Returns the actual current date/time — an LLM has a training cutoff and no live clock, so it can't know what time it actually is right now.

    format timezone

15. ean_validate

    Validates an 8-digit (EAN-8), 12-digit (UPC-A), 13-digit (EAN-13), or 14-digit (GTIN-14) barcode checksum: alternating weights 1 3 applied right-to-left, check digit is (10 - sum mod 10) mod 10.

    value

16. email_validate

    Checks value is a single, bare RFC 5322 email address — syntax only, not a deliverability check. user@localhost is valid (no TLD required). "Name <email>" display syntax is rejected.

    value

17. encode_decode

    Decodes rot13, base64, base64url, base32, hex, uuencode, urlcomponent, urlform, or html text back to the original. encoding in the result is "text" if the decoded bytes are valid UTF-8, or "base64" if they're binary.

    format input

18. encode_encode

    Encodes plain UTF-8 text into rot13, base64, base64url, base32, hex, uuencode, urlcomponent (RFC 3986 percent-encoding, space -> %20), urlform (application/x-www-form-urlencoded, space -> +), or html (entity-escapes < > & ' "). Returns plain ASCII.

    format input

19. hash_digest

    Computes a hash digest of input (decoded per encoding: "text" default, "base64", or "hex") using algo: md5, sha1, sha256, sha512, or crc32. Returns the digest as lowercase hex.

    algo input encoding

20. hash_hmac

    Computes an HMAC of input (decoded per encoding) using algo: md5, sha1, sha256, or sha512 (crc32 isn't offered — it's a checksum, not a cryptographic primitive HMAC composes with). key is used as its raw UTF-8 bytes, not decoded per encoding. Returns the MAC as lowercase hex.

    algo key input encoding

21. iban_validate

    Validates an IBAN's length for its issuing country (per the SWIFT IBAN registry) and its mod-97 checksum. Does not decompose the BBAN into a bank code/account number or resolve a BIC.

    value

22. isbn_validate

    Validates a 10- or 13-character ISBN. ISBN-10 uses weights 10..1 over 10 characters (last may be X, worth 10), sum mod 11 must be 0. ISBN-13 uses the same GTIN checksum as barcodes.

    value

23. jsonschema_validate

    Validates document against schema (JSON Schema draft-07 or 2020-12). Reports one specific violation per call, not an aggregated list.

    schema document

24. luhn_validate

    Validates a numeric string against the Luhn (mod-10) checksum — payment card numbers, IMEI numbers, and similar identifiers.

    value

25. network_cidr_contains

    Reports whether a CIDR block contains an address. Different address families (IPv4 vs IPv6) never match.

    cidr address

26. network_cidr_info

    Parses a CIDR block and reports its network address, address range, and address count. An address with host bits set (e.g. 10.14.32.17/21) is normalized to its network address in the result.

    cidr

27. network_cidr_overlaps

    Reports whether two CIDR blocks share any address.

    cidrA cidrB

28. nip_validate

    Validates the checksum of a 10-digit Polish tax identification number (NIP). Checksum uses weights 6 5 7 2 3 4 5 6 7 over the first 9 digits; sum mod 11 must equal the 10th digit. A sum mod 11 of 10 is itself invalid.

    value

29. pesel_validate

    Validates the checksum of an 11-digit Polish national identification number (PESEL). Checksum uses weights 1 3 7 9 1 3 7 9 1 3 over the first 10 digits; control digit is (10 - sum mod 10) mod 10. On success also decodes the date of birth and sex embedded in the number; a checksum-valid number with an impossible calendar date (e.g. Feb 30) is still reported invalid.

    value

30. pipe_run

    Runs a short ordered chain of existing apished operations in one call (same as POST /v1/pipe/run), passing one named field of each step's result into the next step's args. Stops at the first failing step.

    steps

31. random_int

    Generates cryptographically random integers in [min, max] (inclusive), using crypto/rand — an actual random value, not a guess. count defaults to 1, max 1000.

    min max count

32. regex_extract

    Extracts up to maxMatches non-overlapping regex matches from input, using Go's RE2-based regexp engine (linear-time, no backreferences/lookaround). Named groups (?P<name>...) are reported in namedGroups.

    pattern input maxMatches

33. regex_match

    Tests input against pattern (Go's regexp package: RE2 syntax, not PCRE — no backreferences or lookaround; use inline flags like (?i) for case-insensitive matching). Returns the full match and captured groups.

    pattern input

34. regex_replace

    Replaces every regex match of pattern in input with replacement, which may reference capture groups as $1, $name, etc. (Go's Regexp.Expand syntax).

    pattern input replacement

35. regex_split

    Splits input around regex matches of pattern, returning at most limit substrings (the last holds the unsplit remainder). limit<=0 means no limit.

    pattern input limit

36. regon_validate

    Validates the checksum of a 9- or 14-digit Polish business registry number (REGON). 9-digit: weights 8 9 2 3 4 5 6 7 over the first 8 digits, sum mod 11 (10 mapped to 0) must equal the 9th digit. 14-digit: the first 9 digits must themselves be a valid 9-digit REGON, and weights 2 4 8 5 0 9 7 3 6 1 2 4 8 over the first 13 digits (sum mod 11, 10 mapped to 0) must equal the 14th digit.

    value

37. rpncalc_eval

    Evaluates a Reverse Polish Notation (postfix) expression: whitespace-separated tokens, each a number or an operator/function that pops its operands off a stack and pushes the result. Supports arithmetic, exponentiation/modulo, roots, trigonometry, logarithms, rounding, bitwise ops, and constants (pi, e, phi). Always returns the decimal result — for hex/bin/oct rendering, convert the returned number yourself.

    expr

38. swiftbic_validate

    Structural format validation only for a SWIFT/BIC code: 8 or 11 characters (4 letters bank code + 2 letters country code + 2 alphanumeric location code + optional 3 alphanumeric branch code). The country code is not cross-checked against ISO 3166-1.

    value

39. text_charat

    Returns the 0-indexed character (rune) at index in text.

    text index

40. text_count

    Counts non-overlapping occurrences of substring in text (rune-safe, not byte-based).

    text substring

41. text_palindrome

    Checks whether text reads the same forwards and backwards. ignoreCase/ignoreNonAlnum default false (strict, literal comparison); set both true for phrase-style palindromes like "A man, a plan, a canal: Panama".

    text ignoreCase ignoreNonAlnum

42. text_reverse

    Reverses text by Unicode code point (rune), not grapheme cluster.

    text

43. text_sort

    Sorts text's characters or words alphabetically. by: "chars" (default, sorts runes, no separator) or "words" (splits on whitespace, rejoins with a single space).

    text by

44. text_stats

    Descriptive statistics for text: rune/byte/word/line counts, a unique-rune count, a letters/digits/spaces/punctuation/other breakdown, an exact per-character frequency table, and word-length min/max/average plus the actual shortest/longest word (ties resolve to the first occurrence).

    text

45. text_wordcount

    Counts whitespace-delimited words in text.

    text

46. tokens_count

    Counts tokens under an OpenAI-compatible (tiktoken) encoding. Provide exactly one of model (e.g. "gpt-4o") or encoding ("o200k_base" or "cl100k_base"). No Claude/Anthropic tokenizer.

    text model encoding

47. units_convert_datasize

    Converts a data-size value (decimal string) between bit, Kbit, Mbit, Gbit, Tbit (SI bits), B, KB, MB, GB, TB, PB (SI bytes), and KiB, MiB, GiB, TiB, PiB (IEC bytes). Always exact.

    value from to

48. units_convert_temperature

    Converts a temperature value (decimal string) between C, F, and K. Offset-aware, not a bare multiplier.

    value from to

49. url_validate

    Checks value is a well-formed absolute URL (has both a scheme and a host) — syntax only, not a reachability check.

    value

50. uuid_generate

    Generates count (default 1, max 1000) random version-4 UUIDs from crypto/rand-backed entropy.

    count

51. uuid_validate

    Parses value as a UUID and reports its version/variant if well-formed.

    value

52. vateu_validate

    Format validation only (no VIES lookup) for an EU VAT number: checks the 2-letter member-state prefix (EL for Greece, XI for Northern Ireland) against that country's digit/letter pattern. A format-valid result does not mean the number is actually registered.

    value