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Tryvon

by tryvon.nl · remote · no sign-in to list tools · v1.1.1 · published by nl.tryvon

Dutch price comparison, starting with travel eSIMs: total price, delivery and price history.

Changes · 2
CompareRegistry entry

6 tools: 2 change things and 4 only read.

Scanned Oct 21, 2026

No check matched anything in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http tryvon https://tryvon.nl/mcp

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

6 tools

Changes things 2Claude Code: ask
  • price_historyLowest daily total price of a product over time (all shops together), with the lowest price ever and the change versus 30 days ago.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    Lowest daily total price of a product over time (all shops together), with the lowest price ever and the change versus 30 days ago. Use to answer "is this a good moment to buy?".

    Annotations the server declares

    • title: Price history
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
    • readOnlyHint: true
  • top_productsThe best products for a need, e.g.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    The best products for a need, e.g. "top 5 smartphones" or "best airfryer under 150 euro", ranked by the Tryvon score: buyer rating (review-weighted, so a few 5-star reviews don't beat thousands of 4.6-star ones), popularity, value for money and delivery speed. Commission plays no part. Returns rating, review count, lowest price, shops and key specifications per product. Products without reviews are marked hasReviews=false.

    Annotations the server declares

    • title: Top products
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
    • readOnlyHint: true
Only reads 4Claude Code: allow
  • compare_pricesFor one product, list every shop selling the same item (matched by barcode or brand + part number), cheapest total price first, with each shop's delivery promise.No findings

    Why it is in this group

    • The name "compare_prices" says "compare": a word for reading.
    Description, as the server wrote it
    For one product, list every shop selling the same item (matched by barcode or brand + part number), cheapest total price first, with each shop's delivery promise. Answers "where is this cheapest" and "who delivers it tomorrow". Pass product_key or offer_id.

    Annotations the server declares

    • title: Compare prices across shops
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
    • readOnlyHint: true
  • compare_productsCompare 2-4 different products side by side: every specification (rows where they differ are marked), buyer rating, lowest total price and shop, number of shops and delivery.No findings

    Why it is in this group

    • The name "compare_products" says "compare": a word for reading.
    Description, as the server wrote it
    Compare 2-4 different products side by side: every specification (rows where they differ are marked), buyer rating, lowest total price and shop, number of shops and delivery. Marks the cheapest, the best rated and the best choice (highest Tryvon score).

    Annotations the server declares

    • title: Compare different products
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
    • readOnlyHint: true
  • search_productsSearch products and travel eSIM data plans at Dutch partner shops.No findings

    Why it is in this group

    • The name "search_products" says "search": a word for reading.
    Description, as the server wrote it
    Search products and travel eSIM data plans at Dutch partner shops. Returns products (one entry per product, not per shop) with the lowest total price incl. shipping, the cheapest shop, how many shops sell it and whether any shop delivers next day. Use compare_prices with product_key to see every shop for one product.

    Annotations the server declares

    • title: Search products
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
    • readOnlyHint: true

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Install

Pinned to version 1.1.1. Values in angle brackets are yours to fill in.

claude mcp add --transport http tryvon https://tryvon.nl/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__tryvon__compare_products",
      "mcp__tryvon__search_products",
      "mcp__tryvon__get_buy_link",
      "mcp__tryvon__compare_prices"
    ],
    "ask": [
      "mcp__tryvon__price_history",
      "mcp__tryvon__top_products"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as tryvon. Review it before you use it.