peppolvalidator.com

01Agentic payment rails

02A primary action is discoverable

03Markdown content negotiation

// Next.js route handler
if (request.headers.get("accept")?.includes("text/markdown")) {
  return new Response(markdownFor(slug), {
    headers: { "content-type": "text/markdown; charset=utf-8", vary: "Accept" },
  });
}

// Register the first tool an agent can call on this page.
// Works today with the polyfill: npm install @mcp-b/global
await document.modelContext.registerTool({
  name: "search_products",
  description: "Search the product catalogue by free text. Returns name, price and a link per match.",
  inputSchema: {
    type: "object",
    properties: { query: { type: "string", description: "Free-text search term" } },
    required: ["query"],
  },
  annotations: { readOnlyHint: true },
  execute: async ({ query }, { signal }) => {
    const res = await fetch(`/api/products?q=${encodeURIComponent(query)}`, { signal });
    return { content: [{ type: "text", text: JSON.stringify(await res.json()) }] };
  },
});

{
  "name": "peppolvalidator.com",
  "description": "Return a short summary of this site and links to its main sections.",
  "tools": [
    {
      "name": "search_products",
      "description": "Search the product catalogue by free text. Returns name, price and a link per match."
    }
  ],
  "pages": [
    "https://peppolvalidator.com/"
  ]
}

# Peppol Validator - Free Online BIS 3 & UBL XML Check

> Free online Peppol validator. Drop UBL XML invoices and credit notes. Get every BIS Billing 3.0, EN16931 and country-specific schematron error in seconds. No signup, no upload limit, shareable result links.

## Main pages
- [Start](https://peppolvalidator.com/)
- [About](https://peppolvalidator.com/about)
- [Contact](https://peppolvalidator.com/contact)