MCP server

Barcode Tools (decode, render, GTIN validate)

io.github.appvantagelabs2-a11y/barcode

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

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

Working at last checkAbout 614 tokens per request once connected4 tools

Website

https://mcp.casuyi.com/mcp

At a glance

Type: MCP server
Publisher: Not verified
Status: Working at last check
Tools: 4
Token cost: About 614 tokens per request
Sets up in: Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok
Last checked: 26 Oct 2026, 08:29 UTC

Connect it to your agent

Add to Cursor Add to VS Code VS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http barcode https://mcp.casuyi.com/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.barcode]
url = "https://mcp.casuyi.com/mcp"

Gemini CLI

{"mcpServers":{"barcode":{"httpUrl":"https://mcp.casuyi.com/mcp"}}}

Cursor

{"mcpServers":{"barcode":{"url":"https://mcp.casuyi.com/mcp"}}}

VS Code

{"servers":{"barcode":{"type":"http","url":"https://mcp.casuyi.com/mcp"}}}

Antigravity

agy mcp add barcode https://mcp.casuyi.com/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"barcode","server_url":"https://mcp.casuyi.com/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"barcode","server_url":"https://mcp.casuyi.com/mcp"}

Tools

decode_barcode ~198 tokens
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.
list_formats ~65 tokens
Static table of supported barcode formats with render/decode support and notes.
render_barcode ~229 tokens
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.
validate_gtin ~122 tokens
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).

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