Is the Appvantagelabs2 A11y Barcode MCP server down?

mcp-registry/io.github.appvantagelabs2-a11y/barcode · v0.3.0

As of 2026-10-22 15:53 UTC, the Appvantagelabs2 A11y Barcode MCP server is up with a Glimind reliability score of 88/100 (grade B). Over the last 30 days it answered 99.9% of Glimind's liveness checks. It had 6 outages in 90 days, with a median recovery of 11 minutes.

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

claude mcp add --transport http appvantagelabs2-a11y-barcode-mcp-server https://mcp.casuyi.com/mcp

{
  "mcpServers": {
    "appvantagelabs2-a11y-barcode-mcp-server": {
      "type": "http",
      "url": "https://mcp.casuyi.com/mcp"
    }
  }
}

Third-party server, listed as discovered. Review its source before installing.

Agent-readiness: B (84/100)

What to fix (3)

Auto-fix: 2 corrected tool definitions

Paste-ready definitions with the problems above fixed. Changes marked verify need a human look. All of them as JSON: /v1/readiness/mcp-registry%2Fio.github.appvantagelabs2-a11y%2Fbarcode/fixes

{
  "name": "list_formats",
  "description": "Static table of supported barcode formats with render/decode support and notes.",
  "inputSchema": {
    "type": "object",
    "$schema": "https://json-schema.org/draft/2020-12/schema",
    "properties": {}
  },
  "annotations": {
    "readOnlyHint": true
  },
  "title": "List supported symbologies"
}

{
  "name": "validate_gtin",
  "description": "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).",
  "inputSchema": {
    "type": "object",
    "$schema": "https://json-schema.org/draft/2020-12/schema",
    "required": [
      "code"
    ],
    "properties": {
      "code": {
        "type": "string",
        "description": "Candidate product code, digits only"
      }
    }
  },
  "annotations": {
    "readOnlyHint": true
  },
  "title": "Validate a GTIN/EAN/UPC code"
}

Get alerted

Get an email or webhook when this server's readiness drops by 10+ points, tool-poisoning text appears, or a tool breaks:

curl -X POST https://glimind.com/v1/subscriptions -H 'content-type: application/json' -d '{"tools":["mcp-registry/io.github.appvantagelabs2-a11y/barcode"],"email":"[email protected]"}'

Agents: watch_tool({"toolId": "mcp-registry/io.github.appvantagelabs2-a11y/barcode"}) over MCP.

Passed

• Every tool has a well-formed, typed input schema.
• Every tool and parameter is described.
• No tool-poisoning patterns (hidden characters, instruction overrides, concealment, secret access, tool shadowing).
• Compact tool list (~595 tokens).
• Tool names are unique and portable across clients.
• Speaks MCP 2025-06-18.
• 99.91% uptime over 30 days.
• No breaking contract changes in 30 days.

Largest tool definitions

• render_barcode ~222 tokens
• decode_barcode ~192 tokens
• validate_gtin ~118 tokens
• list_formats ~63 tokens

Static checks of the advertised tools/list (schema, descriptions, annotations, tool-poisoning patterns, names, size) plus observed protocol, uptime, latency and contract changes. Read-only: no tool is ever called. Weights: schema 15, docs 20, safety 15, efficiency 15, compatibility 15, protocol 5, reliability 10, stability 5. Token counts are estimates (~3.6 characters per token).

Operator? Fix these, then re-check live. Embed the readiness badge:

[![MCP agent-readiness](https://glimind.com/v1/readiness/badge/mcp-registry%2Fio.github.appvantagelabs2-a11y%2Fbarcode.svg)](https://glimind.com/server/mcp-registry%2Fio.github.appvantagelabs2-a11y%2Fbarcode?ref=badge)

<a href="https://glimind.com/server/mcp-registry%2Fio.github.appvantagelabs2-a11y%2Fbarcode?ref=badge"><img src="https://glimind.com/v1/readiness/badge/mcp-registry%2Fio.github.appvantagelabs2-a11y%2Fbarcode.svg" alt="MCP agent-readiness"></a>

.. image:: https://glimind.com/v1/readiness/badge/mcp-registry%2Fio.github.appvantagelabs2-a11y%2Fbarcode.svg
   :target: https://glimind.com/server/mcp-registry%2Fio.github.appvantagelabs2-a11y%2Fbarcode?ref=badge
   :alt: MCP agent-readiness

Tool-definition log

Glimind records every version of this server's tool definitions in a signed, append-only transparency log. Current manifest sha256:908f3307f066a253…, first seen 2026-10-17, included at leaf 3121 of 46,801. Version history · verify what your client received.

Tools (4)

• decode_barcode
• list_formats
• render_barcode
• validate_gtin

Compare: most reliable media servers · most reliable knowledge servers · most reliable data servers

claude mcp add --transport http glimind https://glimind.com/mcp

{
  "mcpServers": {
    "glimind": {
      "type": "http",
      "url": "https://glimind.com/mcp"
    }
  }
}

FAQ

Is the Appvantagelabs2 A11y Barcode MCP server down right now?

As of 2026-10-22 15:53 UTC, the Appvantagelabs2 A11y Barcode MCP server is up with a Glimind reliability score of 88/100 (grade B). Over the last 30 days it answered 99.9% of Glimind's liveness checks. It had 6 outages in 90 days, with a median recovery of 11 minutes.

How many tools does Appvantagelabs2 A11y Barcode MCP server provide?

Appvantagelabs2 A11y Barcode MCP server advertises 4 tools, including decode_barcode, list_formats, render_barcode, validate_gtin.

How do I install Appvantagelabs2 A11y Barcode MCP server?

Point your MCP client at this streamable-http endpoint: https://mcp.casuyi.com/mcp

Is the Appvantagelabs2 A11y Barcode MCP server safe to connect to an AI agent?

Glimind scanned all 4 tool definitions for tool-poisoning patterns — hidden or invisible characters, instructions that override the model, concealment from the user, requests to read credential or MCP config files, conversation exfiltration and cross-tool shadowing — and found none. This checks what the server tells the model, not what its code does; review the source before granting access to sensitive data.

Operator of Appvantagelabs2 A11y Barcode MCP server?

Status page: 90-day uptime, every outage and how long it lasted.

Claim this listing to get the Verified operator marker, a remediation checklist and owner analytics, or embed the live badge from any of the tool pages above. Maintainers: alerts, deploy attestation and monthly reports.

Status is an automated estimate from Glimind's liveness checks (handshake and tool listing only; no tool is ever called) and may lag or differ from your network. Glimind is not affiliated with this server or its operator. Operator? Request a correction or opt out at https://glimind.com/opt-out.