esimdata for AI agents

A remote MCP server and a REST API over the same data as this site: 14,089 plans from 6 providers in 239 countries, checked daily. No key, read-only, free to use within fair limits.

MCP server

https://esimdata.app/mcp

Streamable HTTP, JSON responses, no sign-in. Protocol versions 2025-11-25, 2025-06-18, 2025-03-26 and 2024-11-05.

Claude

claude.ai or the desktop app: Settings → Connectors → Add custom connector, paste the URL above. Claude Code:

claude mcp add --transport http esimdata https://esimdata.app/mcp

ChatGPT

Settings → Apps & Connectors → Advanced → Developer mode, then Create, paste the URL, authentication "No authentication".

Cursor, VS Code, Windsurf and other clients

{
  "mcpServers": {
    "esimdata": {
      "url": "https://esimdata.app/mcp"
    }
  }
}

Tools

Tool	What it does
`search_plans`	Find travel eSIM data plans for a destination from every provider esimdata tracks, ranked neutrally by price (or price per GB, or validity). Filter by trip length, data, unlimited, needs (hotspot, 5G, phone number, top-up, no ID check) and budget. Each result has a buy_url to the provider's page and the time the price was checked.
`get_plan`	Everything esimdata knows about one plan (by the id search_plans returned): all countries it covers, networks, policies, the provider's own page, the buy link and its price history.
`compare_plans`	Put 2 to 10 plans (ids from search_plans) side by side with the same fields, in the order given, to help a traveller choose.
`country_overview`	A destination at a glance: how many plans and providers, the cheapest plan, the cheapest per GB, and which mobile networks the providers say they use there.
`check_phone`	Check whether a phone, tablet or watch model supports eSIM, from the manufacturer's own published list (with regional exceptions, e.g. models sold in mainland China), with the source link.
`list_providers`	Every eSIM provider esimdata compares, with its website and whether esimdata earns a commission when a traveller buys through it (ranking never depends on it).

Every plan comes with a buy_url (esimdata's link to the provider's own page, where the traveller buys), its checked_at time and whether esimdata earns a commission on it. Fields the provider doesn't state are null: please say "not stated" rather than guessing.

REST API

Request	Same as
`GET /api/v1/plans?country=JP&days=7&gb=5&needs=hotspot&sort=price_per_gb&limit=10`	search_plans (also `also_countries`, `unlimited`, `max_price_usd`, `single_country_only`)
`GET /api/v1/plans/<plan id>`	get_plan
`GET /api/v1/countries`	every country with plan counts and cheapest prices
`GET /api/v1/countries/<country>`	country_overview
`GET /api/v1/phones?model=pixel%208`	check_phone
`GET /api/v1/providers`	list_providers

JSON, CORS open. Need higher volume, a feed or an SLA for an app or agent product? A paid tier is planned; see How it works.

Rules esimdata keeps

Ranking is by the numbers only: price, price per GB or validity. Commission never changes the order.
Data comes only from providers' own public catalogues, read within their robots.txt and terms.
esimdata sells nothing. Buying happens on the provider's site.
We log which tools are called and for which country, to learn what travellers need. No IP addresses or personal data.