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Lons Publishing ISBN MCP server

Which MCP servers are Lons Publishing ISBN's own, from the official registry and from asking its own domain, whether they answer, and what they offer. A program checked each of these, nobody copied them from a product page.

read 2026-10-27

← Back to Lons Publishing ISBN

Whose server it is
  • Registry namecom.lonscloud/isbnverified in the MCP registry

The registry name sits under lonscloud.com. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

When we asked itchecked 2026-10-27
  • Stateanswerschecked 2026-10-27
  • Tools4
  • Server calls itselflons-isbn
  • Server version1.1.0
  • Protocol version2025-06-18

On 2026-10-27 the server answered initialize and tools/list without a sign-in. First answer in 216 ms.

Should an agent connect itSkip it
  • Its tools do none of the product's use cases we checked: add a barcode to a printed book cover; list a book on Amazon, Google Books or bookstores.
  • Checked on 2 of the 7 days it takes to judge reliability.

Said by rules from the measurements above. The likely first call is a model's pick from the tool list; read its description before relying on it.

Measured dailydaily checks: 2, the first on 2026-10-27
  • INITE MCP scoreafter a weeka score needs 7 daily checks: 2 so far
  • What an agent can do with it0 of 2 use cases
  • Answeredmeasuring2 of the 7 daily checks it takes to print a share
  • Median first answer188 ms
  • Space in an agent's context≈ 545 tokensthe definitions of all its tools (4), which an agent carries on every turn
  • Tool definitionsA · 100 of 100
  • Typed results0 of 4 toolsdeclared outputSchema: results come typed, read once
  • Every tool passes all six checks.

What an agent can do with it

  • not sure · obtain a 13-digit ISBN under their own imprint
  • cannot · add a barcode to a printed book cover
  • cannot · list a book on Amazon, Google Books or bookstores

Each of the product's use cases, put to Jev against this server's tool list: can an agent do it with these tools?

Worth a look

None of the five warning signs in these definitions.

A program checks the server once a day: initialize and tools/list, no model. Tokens are the definitions' length at about four characters a token. The grade averages six checks of every tool's name, description, schema and annotations; it says how well the tools are described, not whether they work. The score weighs what was measured and nothing else: answering (25%), doing the product's job (25%), definitions (20%), context (10%), use (10%) and how readily a client connects (10%). A part that was not measured is left out, and a hidden instruction caps the score at 40. The state of vendors' MCP servers: method and numbers →

Tools it offers4 tools · read 2026-10-27
  • get_isbn_offer

    Returns the three ISBN packs (simple, barcode, premium) with prices in USD and FCFA (XOF), what each includes, delivery delay, payment methods, supported languages and contact.

  • get_order_link

    Returns the secure page where the CUSTOMER pays for an ISBN pack. card = Stripe Checkout link; mobile_money = order page with the Mobile Money form. This tool never performs or initiates a payment and collects no payment data.

  • get_required_book_info

    Lists the fields the customer fills in on the thank-you page after payment, so an agent can help prepare them in advance.

  • faq

    Answers common questions about the ISBN service. Optional keyword filter.

How to connect

Add the server to your MCP client config. Claude Desktop, Cursor and most other clients read this shape:

{
  "mcpServers": {
    "isbn": {
      "type": "http",
      "url": "https://lons-isbn-mcp.padbor.workers.dev/mcp"
    }
  }
}

Add it

Claude Code, in a terminal

claude mcp add --transport http lonscloud https://lons-isbn-mcp.padbor.workers.dev/mcp

Add to CursorAdd to VS Code

claude.ai, ChatGPT and other clients: add https://lons-isbn-mcp.padbor.workers.dev/mcp as a custom connector in the settings.

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.