EAN Check barcode tools for ChatGPT

com.eancheck/barcode-tools

GS1 check digits, code identification, UPC-E and ISBN conversion, GTIN repair and barcodes.

client:ChatGPT transport:streamable-http tools:10

Install EAN Check barcode tools in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://eancheck.com/api/mcp

Custom connectors are a paid-plan feature and take a remote URL only. ChatGPT cannot run a packaged server locally. ChatGPT docs