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esimoa MCP server

Which servers in the official MCP registry are esimoa's own, whether they answer, and what they offer. A program checked each of these, nobody copied them from a product page.

read 2026-10-20

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Whose server it is
  • Registry namecom.esimoa/esimverified in the MCP registry

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

When we asked itchecked 2026-10-20
  • Stateanswerschecked 2026-10-20
  • Tools6
  • Server calls itselfesimoa
  • Server version1.1.0
  • Protocol version2025-06-18

On 2026-10-20 the server answered initialize and tools/list without a sign-in. First answer in 733 ms.

Should an agent connect itNot proven either way yet
  • Whether its tools do the product's job has not been judged yet.
  • Checked on 2 of the 7 days it takes to judge reliability.

Once connected

  • Parameters are untyped or undescribed in 2 of 6 tools: check arguments before calling.

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 2026-10-20
  • INITE MCP scoreafter a weeka score needs 7 daily checks: 2 so far
  • Use1 GitHub stars
  • Answeredmeasuring2 of the 7 daily checks it takes to print a share
  • Median first answer851 ms
  • Space in an agent's context≈ 1,388 tokensthe definitions of all its tools (6), which an agent carries on every turn
  • Tool definitionsA · 94 of 100
  • Typed results6 of 6 toolsdeclared outputSchema: results come typed, read once
  • Parameters without a description: in 2 of 6

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 (30%), doing the product's job (25%), definitions (20%), context (10%) and use (15%). 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 offers6 tools · read 2026-10-20
  • search_esims

    Search the travel eSIM catalog of esimoa (이심모아) and compare plans for a destination. Filter by trip length, data, unlimited or daily data, local phone number, local or roaming network, multi-country coverage, price, provider, hotspot and…

  • get_esim

    Get the details of one esimoa (이심모아) eSIM plan by id (from search_esims), including its plan page `url`.

  • compare_esims

    Compare 2 to 5 esimoa (이심모아) eSIM plans side by side by id (ids come from search_esims): price, data, validity, price per GB, coverage, network, hotspot and local phone number. Returns which plan has the lowest price, most data, longest…

  • list_countries

    List countries where esimoa (이심모아) sells eSIMs, with the number of plans and the lowest price (KRW). Optionally filter by name.

  • search

    Free-text search of esimoa (이심모아) eSIM plans in the search/fetch format used by ChatGPT deep research, e.g. "Japan 7 days unlimited" or "USA 3 days local phone number". Understands unlimited, daily, local phone number, local network…

  • fetch

    Fetch one esimoa (이심모아) eSIM plan as a document by id returned from search (ChatGPT deep research format). For plans found with search_esims, use get_esim.

How to connect

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

{
  "mcpServers": {
    "esim": {
      "type": "http",
      "url": "https://api.esimoa.com/mcp"
    }
  }
}

Add it

Claude Code, in a terminal

claude mcp add --transport http esimoa https://api.esimoa.com/mcp

Add to CursorAdd to VS Code

claude.ai, ChatGPT and other clients: add https://api.esimoa.com/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.