Barcode Tools (decode, render, GTIN validate)

io.github.appvantagelabs2-a11yPublished by GitHub account appvantagelabs2-a11yv1.0.2Updated Oct 24, 2026

Decode, render, validate barcodes: QR, DataMatrix, EAN, UPC, PDF417. All tools free, no auth.

VerifiedStreamable HTTPWeb executableDeveloper ToolsMedia & Design

Overview

AI-generated overview

A remote MCP server that lets an assistant decode barcodes from images, render text as barcode PNGs, and validate GTIN product codes.

What you can do
Decode barcodes and QR codes found in a base64-encoded image, optionally filtered by format, returning format and text pairs. Render text as a barcode PNG in formats such as QR, Aztec, DataMatrix, Code128, EAN, UPC and PDF417, with a self-check decode flag. Validate GTIN product codes for length and mod-10 checksum and return the detected type and normalized value. List the supported barcode formats with render and decode support notes.
When to use it
Useful when an assistant needs to read codes from product or document images, generate barcode images for labels or testing, or check whether a product code is a well-formed GTIN.
Requirements
A remote streamable HTTP endpoint; no authentication, API keys or environment variables are declared. Images must be supplied as base64-encoded bytes.
Before you install
Images you submit are sent to a third-party remote service, so avoid confidential material. Rendering and validation are read-only computations, but GTIN codes with an invalid mod-10 checksum are rejected.

Installation

In SourceWeft

  1. Open Barcode Tools (decode, render, GTIN validate) in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/io.github.appvantagelabs2-a11y%2Fbarcode/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "barcode-tools-decode-render-gtin-validat": {
      "type": "http",
      "url": "https://mcp.casuyi.com/mcp"
    }
  }
}

Tools

4

decode_barcode

Decode barcodes from an image

Detect and decode all barcodes in an image. Input: base64-encoded image bytes (PNG/JPEG/WebP/anything sharp reads). Output: JSON array of {format, text}. Supports QR, Aztec, DataMatrix, Code128/39/93, EAN-13/8, UPC-A/E, ITF, PDF417, Codabar. Use formats filter to restrict results.

Parametersformatsimage_base64required

render_barcode

Render a barcode/QR to PNG

Render text as a barcode PNG. format: one of qr, aztec, datamatrix, code128, code39, code93, ean13, ean8, upca, itf, pdf417. Output: base64 PNG plus 'decoded' self-check flag (we decode our own render; upca intentionally verifies as zero-padded EAN-13). GTIN codes must have a valid mod-10 checksum.

Parameterstextrequiredscaleformatrequired

validate_gtin

Validate a GTIN/EAN/UPC code

Check a product code against GTIN rules: length + mod-10 checksum. Returns {valid, type: ean13|ean8|upcA|null, normalized}. Rejects codes with a broken checksum (e.g. 8595234703191).

Parameterscoderequired

list_formats

List supported symbologies

Static table of supported barcode formats with render/decode support and notes.

Takes no parameters.

Version history

2
  1. v1.0.2LatestSep 16, 2026
  2. v1.0.1Sep 16, 2026

Score

83% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts
  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts

    Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.

  • LicenseNot applicable

    A hosted service is used under its provider's terms, so no license is expected here. This check is left out of the percentage.