Gs1

Install

Works with Claude Code, Codex, VS Code, Cursor, Windsurf, Claude Desktop. Read the repository before you give any tool access to your data.

npx agentmarket install connector/yaktool-com-gs1

About

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Permissions

What this server can do and what it asks for, from its tool list, install config and code. Checked Oct 25, 2026.

Tools

4 read · 3 write · 0 delete

Secrets

None asked for

Install scripts

None found

Runs as

Node.js package

Tools (7)

Read from the source code; the running server may differ. Descriptions are the server’s own words; hidden characters are shown as [U+…].

• build_gs1_element_stringBuild a GS1-128 element string from application identifiers

  The inverse of parse_gs1_element_string: turn AI/value pairs into the string a barcode actually carries. THREE FORMS come back and only one of them is the data: `hri` is the human-readable form with brackets — never encode those; `data` is the real payload where FNC1 is the ASCII group separator (U+001D); `visible` is the same payload with FNC1 shown as <GS> so it survives being pasted into a chat or a ticket. Separator rule, both halves: a variable-length element is closed by FNC1 UNLESS it is the last element — omitting it runs two fields together, and adding a trailing one makes the symbol …

• build_variable_measure_codeBuild a variable-measure barcode number with its price check digit

  Description is built at runtime.

• check_itf14_specCheck an ITF-14 case code print specification and compute its printed size

  Judge the PRINT SPECIFICATION of an ITF-14 carton barcode against the GS1 General Specifications (Release 26.0), and compute how big it will actually be. This is the layer the barcode generators skip: they draw the symbol, but a case code is rejected at goods-in for its dimensions far more often than for its number. THE BEARER BAR RULE DEPENDS ON THE PRESS, and getting this backwards is the main way a compliant label gets called non-conformant: a plate-based process needs a constant 4.83 mm bearer bar completely surrounding the symbol including its quiet zones (it equalises plate pressure); a …

• decode_variable_measure_codeDecode a variable-measure (price- or weight-embedded) in-store barcode

  Description is built at runtime.

• generate_gs1_datamatrixGenerate a GS1 DataMatrix (ECC200) from application identifiers

  Build a GS1 DataMatrix symbol and return it as SVG plus the module matrix. WHAT MAKES IT A *GS1* DataMatrix: FNC1 in the first position (codeword 232). Without it the symbol is a plain DataMatrix carrying digits and no scanner has any reason to read 0104006381333931 as a GTIN; with it the scanner emits the ]d2 symbology identifier and downstream systems split the data into AIs. This tool always sets it. The element string is validated BEFORE anything is drawn (unknown AI, wrong length, bad check digit, invalid date, character set) and no symbol is returned when a check fails — a symbol that sc…

• list_gs1_keysList the GS1 identification keys and their syntax

  Return the GS1 keys this server can validate, each with the application identifiers that carry it, what it identifies, and its syntax as written in the GS1 Barcode Syntax Dictionary (for example "N1,zero N13,csum [X..16]" for GRAI). Useful before validating: it tells you which key a given AI belongs to, which keys carry a check digit, and which two (GIAI, GINC) carry none at all. Returns { keys[{key, ais, name, identifies, syntax, hasCheckDigit, hasCheckPair, numericLength?, maxLength?}] }.

• validate_gs1_extended_keyValidate GRAI, GIAI, GSRN, GDTI, GINC, GSIN, GCN or GMN

  Validate the eight GS1 keys beyond SSCC and GLN (those two live in validate_gs1_key). The key type must be given: several of these share a length, so guessing would be wrong more often than right. Formats come from the GS1 Barcode Syntax Dictionary, GS1's own machine-readable source: GRAI = a literal 0 plus 13 digits with a check digit plus an optional 16-character serial; GIAI = up to 30 characters, NO check digit; GSRN (8017 provider / 8018 recipient) = 18 digits with a check digit; GDTI = 13 digits with a check digit plus an optional 17-character serial; GINC = up to 30 characters, NO check…

Signals

Last release

Sep 7, 2026 (1 month ago)

Details

Registry name

com.yaktool/gs1

Version

0.3.0

Auth

No auth

Packages

npm yaktool-gs1-mcp

License

License unknown

First seen

Oct 24, 2026

Last checked

Oct 24, 2026

Source

Official MCP Registry