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eSIMCompare MCP server

Which MCP servers are eSIMCompare'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 2026-10-29

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Whose server it is
  • Registry nameco.esimcompare/travel-esim-pricesverified in the MCP registry

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

When we asked itchecked 2026-10-29
  • Stateanswerschecked 2026-10-29
  • Tools3
  • Server calls itselfesimcompare
  • Server version1.1.0
  • Protocol version2025-06-18

On 2026-10-29 the server answered initialize and tools/list without a sign-in. First answer in 301 ms.

Should an agent connect itConnect it
  • Its tools do every use case we checked: compare eSIM data plans by destination and price; pick the lowest-cost data plan for a destination; check data allowance and validity before buying.

Once connected

  • For "compare eSIM data plans by destination and price", the likely first call is search_esim_plans.
  • For "pick the lowest-cost data plan for a destination", the likely first call is search_esim_plans.
  • For "check data allowance and validity before buying", the likely first call is search_esim_plans.

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: 7, the first on 2026-10-29
  • INITE MCP score100 of 100answers 100 · does the job 100 · definitions 100 · context 100 · connects 100
  • What an agent can do with it3 of 3 use cases
  • Answered100% of days7 of 7 daily checks
  • Median first answer530 ms
  • Space in an agent's context≈ 663 tokensthe definitions of all its tools (3), which an agent carries on every turn
  • Tool definitionsA · 100 of 100
  • Typed results0 of 3 toolsdeclared outputSchema: results come typed, read once
  • Every tool passes all six checks.

What an agent can do with it

  • can do · compare eSIM data plans by destination and price
  • can do · pick the lowest-cost data plan for a destination
  • can do · check data allowance and validity before buying

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 offers3 tools · read 2026-10-29
  • search_esim_plans

    Find the cheapest travel eSIM data plans for a destination from 16 providers (Airalo, Holafly, Nomad eSIM, Saily, Ubigi, Yesim and more), filtered to what a trip needs. Returns plans sorted by price (cheapest first) with data allowance…

  • esim_price_index

    What a week of mobile data costs a traveler: the cheapest eSIM with at least 5 GB valid for at least 7 days, per country, from eSIMCompare's price index of 194 countries. With a country: its price, the plan behind it, the cheapest price…

  • compare_esim_providers

    How travel eSIM providers stand against each other on eSIMCompare's data: plans and destinations covered, entry price, best price per GB, share of unlimited plans, an independent verdict, and links to the full review and head-to-head…

How to connect

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

{
  "mcpServers": {
    "travel-esim-prices": {
      "type": "http",
      "url": "https://esimcompare.co/mcp"
    }
  }
}

Add it

Claude Code, in a terminal

claude mcp add --transport http esimcompare https://esimcompare.co/mcp

Add to CursorAdd to VS Code

claude.ai, ChatGPT and other clients: add https://esimcompare.co/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.