APIShed

Reliability

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How to connect

Add it to any MCP client that supports remote servers.

{
  "mcpServers": {
    "apished": {
      "type": "http",
      "url": "https://apished.com/mcp"
    }
  }
}

52 tools

• color_contrast

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

• 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.

• 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.

• csv_parse

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

• csv_stats

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

• 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.

• csv_validate

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

• 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.

• 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.

• 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.

• datemath_dayofweek

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

• datemath_diff

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

• datemath_leapyear

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

• 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.

• 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.

• 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.

• 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.

• 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.

• 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.

• 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.

• 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.

• 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.

• jsonschema_validate

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

• luhn_validate

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

• network_cidr_contains

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

• 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.

• network_cidr_overlaps

  Reports whether two CIDR blocks share any address.

• 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.

• 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…

• 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.

• 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.

• 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.

• 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.

• 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).

• 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.

• 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…

• 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…

• 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.

• text_charat

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

• text_count

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

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