io.github.mrfentmen/barcode-mcp

barcode-mcp

Is the io.github.mrfentmen/barcode-mcp MCP server down? No. It answered initialize and tools/list in the probe of 2026-10-27.

Generate EAN-13 and Code-128 barcodes locally and return SVG data. No network and no key.

alive probed 2026-11-14 · unchanged since 2026-10-27

2tools

258tokens in Claude Opus 5.5

0.1 %of Claude's 200k window

0.1×the median server

432 msto initialize

11 msto list tools

Run it: npx -y barcode-mcp@1.0.1 (stdio, probed in a container with the network off)
Host: npmjs.com
Reports itself as: barcode-mcp 1.0.0
Capabilities: tools
Instructions: none
Of a 1M window: <0.1 % of a 1M context window
Count: 258 tokens in Claude Opus 5.5, exact, measured 2026-10-27. With the Claude Code prefix mcp__…__ on each tool name: 282. The o200k_base estimate is 138. Counted again when the tool definitions change. Method.
Repository: https://github.com/mrfentmen/barcode-mcp
Registry: active, updated 2026-09-21 · registry entry
Changes: 2 recorded, reachable in 2 of them. A row is added when the result, the tool count or the cost changes.

Most expensive tools

The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.87×.

Tool	≈ Claude tokens	o200k estimate	Share of this server
generate_ean	135	72	52 %
generate_code128	123	66	48 %

Other registry entries on npmjs.com, the ones next to this name; all of them.

Servers that mention barcode.

We add a row when the result changes. A server with no change keeps its last row.

Probed	Result	Init	Tools	Claude	o200k
2026-10-27 06:58	alive	321 ms	2	258	138
2026-10-20 06:44	alive	432 ms	2		138

The result of the latest probe, the tool count and the token cost. The feed has an entry for every probe that changed them.

Stops answering, comes back, tool set or cost changes. One confirmation mail first, a stop link in every mail.