MyBestSim eSIM comparator

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Compare prepaid travel eSIM plans by destination, data and trip length; plan multi-country trips.

Maps & Travel

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https://mcp.mybestsim.com/mcp

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get_destination_overview Read-only

Use this when someone asks how much a travel eSIM costs in a country or region, what the average or typical price is, or how much choice there is, before comparing individual plans. Returns the number of plans and providers listed on the MyBestSim comparison page, typical prices computed over all of them (median price of standard packages: 1 GB/7 days, 5, 10 and 20 GB/30 days, unlimited 7 and 30 days; median price per GB), the cheapest plan, the best price per GB, the cheapest unlimited plan if any, the available validities, and the link to the comparison page. Pass currency when you know the traveller's.

destinationstring, required

Where the traveller is going, as they named it: a country in English or another common language ("Japan", "Japon"), an ISO 3166-1 alpha-2 code ("JP"), a well-known city ("Tokyo"), or one of the regions Europe, Asia, Africa, North America, South America, World, Balkans. Never the traveller's home country.

currencystring

Currency to show prices in (ISO 4217, e.g. "EUR", "GBP", "USD"): pass the traveller's currency whenever you know it (their country, their words, prices they quoted). Default: the currency of the MyBestSim page in the conversation language (EUR for fr, de, es, it, nl, pt…; USD for en; GBP is never assumed). Prices are converted exactly as that page shows them.

languagestring

Language of the conversation (ISO 639-1). Links open our comparison page in that language when it exists, otherwise in English. Default "en".

Try it

Call this server's tools from your browser. Nothing to install.

https://mcp.mybestsim.com/mcp

Requests go through mcptry because browsers can't call most MCP servers directly. Header values are sent to the server for that request only and are never stored or logged.

Tool list from our last check. Connect live to refresh it.

get_destination_overview Read-only

destinationstring, required

currencystring

languagestring

Language of the conversation (ISO 639-1). Links open our comparison page in that language when it exists, otherwise in English. Default "en".

Tools (4)

get_destination_overview

read-only

Argument	Type	Description
currency	string	Currency to show prices in (ISO 4217, e.g. "EUR", "GBP", "USD"): pass the traveller's currency whenever you know it (their country, their words, prices they quoted). Default: the currency of the MyBestSim page in the conversation language (EUR for fr, de, es, it, nl, pt…; USD for en; GBP is never assumed). Prices are converted exactly as that page shows them.
language	string	Language of the conversation (ISO 639-1). Links open our comparison page in that language when it exists, otherwise in English. Default "en".
destination*	string	Where the traveller is going, as they named it: a country in English or another common language ("Japan", "Japon"), an ISO 3166-1 alpha-2 code ("JP"), a well-known city ("Tokyo"), or one of the regions Europe, Asia, Africa, North America, South America, World, Balkans. Never the traveller's home country.

Input schema (JSON)

{
  "type": "object",
  "required": [
    "destination"
  ],
  "properties": {
    "currency": {
      "enum": [
        "USD",
        "EUR",
        "GBP",
        "CAD",
        "AUD",
        "JPY",
        "CNY",
        "KRW",
        "INR",
        "THB",
        "IDR",
        "MYR",
        "SGD",
        "PHP",
        "VND",
        "PKR",
        "BDT",
        "LKR",
        "AED",
        "SAR",
        "ILS",
        "TRY",
        "ZAR",
        "KES",
        "NGN",
        "EGP",
        "MAD",
        "BRL",
        "MXN",
        "COP",
        "CLP",
        "PEN",
        "NZD",
        "CHF",
        "SEK",
        "NOK",
        "DKK",
        "PLN",
        "CZK",
        "HUF",
        "RON",
        "BGN",
        "RUB"
      ],
      "type": "string",
      "description": "Currency to show prices in (ISO 4217, e.g. \"EUR\", \"GBP\", \"USD\"): pass the traveller's currency whenever you know it (their country, their words, prices they quoted). Default: the currency of the MyBestSim page in the conversation language (EUR for fr, de, es, it, nl, pt…; USD for en; GBP is never assumed). Prices are converted exactly as that page shows them."
    },
    "language": {
      "enum": [
        "fr",
        "en",
        "de",
        "es",
        "it",
        "nl",
        "pt",
        "ja",
        "ko",
        "sv",
        "no",
        "nn",
        "da",
        "fi",
        "pl",
        "cs",
        "sk",
        "sl",
        "hu",
        "ro",
        "hr",
        "bg",
        "ru",
        "uk",
        "tr"
      ],
      "type": "string",
      "description": "Language of the conversation (ISO 639-1). Links open our comparison page in that language when it exists, otherwise in English. Default \"en\"."
    },
    "destination": {
      "type": "string",
      "maxLength": 80,
      "minLength": 2,
      "description": "Where the traveller is going, as they named it: a country in English or another common language (\"Japan\", \"Japon\"), an ISO 3166-1 alpha-2 code (\"JP\"), a well-known city (\"Tokyo\"), or one of the regions Europe, Asia, Africa, North America, South America, World, Balkans. Never the traveller's home country."
    }
  },
  "additionalProperties": false
}

get_esim_plan

Use this when someone wants the detail of one plan returned by search_esim_plans or get_destination_overview: coverage (number of countries, region), features, validity and price. Needs the planId and the destination it was found under.

read-only

Argument	Type	Description
planId*	string	planId returned by search_esim_plans.
currency	string	Currency to show prices in (ISO 4217, e.g. "EUR", "GBP", "USD"): pass the traveller's currency whenever you know it (their country, their words, prices they quoted). Default: the currency of the MyBestSim page in the conversation language (EUR for fr, de, es, it, nl, pt…; USD for en; GBP is never assumed). Prices are converted exactly as that page shows them.
language	string	Language of the conversation (ISO 639-1). Links open our comparison page in that language when it exists, otherwise in English. Default "en".
destination*	string	Where the traveller is going, as they named it: a country in English or another common language ("Japan", "Japon"), an ISO 3166-1 alpha-2 code ("JP"), a well-known city ("Tokyo"), or one of the regions Europe, Asia, Africa, North America, South America, World, Balkans. Never the traveller's home country.

Input schema (JSON)

{
  "type": "object",
  "required": [
    "planId",
    "destination"
  ],
  "properties": {
    "planId": {
      "type": "string",
      "maxLength": 200,
      "minLength": 1,
      "description": "planId returned by search_esim_plans."
    },
    "currency": {
      "enum": [
        "USD",
        "EUR",
        "GBP",
        "CAD",
        "AUD",
        "JPY",
        "CNY",
        "KRW",
        "INR",
        "THB",
        "IDR",
        "MYR",
        "SGD",
        "PHP",
        "VND",
        "PKR",
        "BDT",
        "LKR",
        "AED",
        "SAR",
        "ILS",
        "TRY",
        "ZAR",
        "KES",
        "NGN",
        "EGP",
        "MAD",
        "BRL",
        "MXN",
        "COP",
        "CLP",
        "PEN",
        "NZD",
        "CHF",
        "SEK",
        "NOK",
        "DKK",
        "PLN",
        "CZK",
        "HUF",
        "RON",
        "BGN",
        "RUB"
      ],
      "type": "string",
      "description": "Currency to show prices in (ISO 4217, e.g. \"EUR\", \"GBP\", \"USD\"): pass the traveller's currency whenever you know it (their country, their words, prices they quoted). Default: the currency of the MyBestSim page in the conversation language (EUR for fr, de, es, it, nl, pt…; USD for en; GBP is never assumed). Prices are converted exactly as that page shows them."
    },
    "language": {
      "enum": [
        "fr",
        "en",
        "de",
        "es",
        "it",
        "nl",
        "pt",
        "ja",
        "ko",
        "sv",
        "no",
        "nn",
        "da",
        "fi",
        "pl",
        "cs",
        "sk",
        "sl",
        "hu",
        "ro",
        "hr",
        "bg",
        "ru",
        "uk",
        "tr"
      ],
      "type": "string",
      "description": "Language of the conversation (ISO 639-1). Links open our comparison page in that language when it exists, otherwise in English. Default \"en\"."
    },
    "destination": {
      "type": "string",
      "maxLength": 80,
      "minLength": 2,
      "description": "Where the traveller is going, as they named it: a country in English or another common language (\"Japan\", \"Japon\"), an ISO 3166-1 alpha-2 code (\"JP\"), a well-known city (\"Tokyo\"), or one of the regions Europe, Asia, Africa, North America, South America, World, Balkans. Never the traveller's home country."
    }
  },
  "additionalProperties": false
}

plan_trip_esim

Use this when one trip visits SEVERAL countries or regions, e.g. "Japan then China", "two weeks in France, Italy and Spain", "Thailand, Vietnam and Cambodia in March". Pass EVERY stage in travel order, with the days spent in each when known (or totalDurationDays), and the data need. Compares, at the real total price, every way to cover the trip: (a) one eSIM for every stage (regional or worldwide plan; coverage is checked country by country against the MyBestSim catalogue, never guessed from a plan name), (b) one plan per stage, and combinations (a regional plan for some stages, other plans for the rest; several regional plans). A plan is only proposed for stages it covers, for their whole duration and data need. Recommends the cheapest total; prefers fewer eSIMs unless installing more saves at least $2 per extra eSIM, and says so. Gives the reason, the number of eSIMs, total price, data and validity, and links to the MyBestSim pages where the traveller buys. List the countries themselves as stages: a region stage (Europe, Asia…) only matches plans listed on that region page. Ask how long they stay and how much data they use when they have not said: without it a 7-day trip with standard use is assumed and reported in "assumptions". Prepaid travel eSIMs only.

read-only

Argument	Type	Description
dataGb	number	Data for the WHOLE trip in GB, when the traveller gives a figure (spread over the stages by days). Unlimited plans always qualify.
currency	string	Currency to show prices in (ISO 4217, e.g. "EUR", "GBP", "USD"): pass the traveller's currency whenever you know it (their country, their words, prices they quoted). Default: the currency of the MyBestSim page in the conversation language (EUR for fr, de, es, it, nl, pt…; USD for en; GBP is never assumed). Prices are converted exactly as that page shows them.
dataNeed

search_esim_plans

Use this when someone is choosing a travel eSIM or needs mobile data abroad for a given country or region, e.g. "cheapest eSIM for Japan", "10 GB for two weeks in Europe", "unlimited data in the USA". Returns a shortlist (up to 10, at most 2 per provider) from the MyBestSim comparator: data allowance, validity, price in the traveller's currency (pass currency; also USD and EUR), 5G/hotspot/calls/SMS, and the link to the full comparison page on mybestsim.com where the traveller buys from the provider. Pass durationDays and dataGb (or dataNeed) whenever the traveller mentions trip length or usage, and ask for them when unknown: without them a 7-day trip with standard use (0.7 GB/day) is assumed and reported in "assumptions"; with dataGb but no durationDays, plans valid for fewer than 7 days are excluded. For a trip through several countries or regions, call plan_trip_esim with every stage instead of searching each country. Prepaid travel eSIMs only: not home mobile contracts, physical SIM cards or a carrier's roaming pass.

read-only

Argument	Type	Description
sort	string	value (default) = the cheapest plan that covers the data need (given, or assumed standard use) for the trip length; with unlimited=true and no figure, the lowest price per GB of fair use; cheapest = lowest total price; data = most data; days = longest validity. The need and trip length filter every sort.
limit	integer	Number of plans to return (default 5).
dataGb	number	Minimum data in GB, when the traveller gives a figure. Unlimited plans always qualify.
currency	string	Currency to show prices in (ISO 4217, e.g. "EUR", "GBP", "USD"): pass the traveller's currency whenever you know it (their country, their words, prices they quoted). Default: the currency of the MyBestSim page in the conversation language (EUR for fr, de, es, it, nl, pt…; USD for en; GBP is never assumed). Prices are converted exactly as that page shows them.

{ "type": "object", "required": [ "itinerary" ], "properties": { "dataGb": { "type": "number", "maximum": 1000, "description": "Data for the WHOLE trip in GB, when the traveller gives a figure (spread over the stages by days). Unlimited plans always qualify.", "exclusiveMinimum": 0 }, "currency": { "enum": [ "USD", "EUR", "GBP", "CAD", "AUD", "JPY", "CNY", "KRW", "INR", "THB", "IDR", "MYR", "SGD", "PHP", "VND", "PKR", "BDT", "LKR", "AED", "SAR", "ILS", "TRY", "ZAR", "KES", "NGN", "EGP", "MAD", "BRL", "MXN", "COP", "CLP", "PEN", "NZD", "CHF", "SEK", "NOK", "DKK", "PLN", "CZK", "HUF", "RON", "BGN", "RUB" ], "type": "string", "description": "Currency to show prices in (ISO 4217, e.g. \"EUR\", \"GBP\", \"USD\"): pass the traveller's currency whenever you know it (their country, their words, prices they quoted). Default: the currency of the MyBestSim page in the conversation language (EUR for fr, de, es, it, nl, pt…; USD for en; GBP is never assumed). Prices are converted exactly as that page shows them." }, "dataNeed": { "enum": [ "light", "standard", "heavy" ], "type": "string", "description": "Data appetite when no figure is given: light ≈ 0.3 GB/day, standard ≈ 0.7 GB/day, heavy ≈ 1.5 GB/day. Default standard. Ignored when dataGb is set." }, "features": { "type": "array", "items": { "enum": [ "fiveG", "hotspot", "calls", "sms" ], "type": "string" }, "maxItems": 4, "description": "Features every proposed plan must include." }, "language": { "enum": [ "fr", "en", "de", "es", "it", "nl", "pt", "ja", "ko", "sv", "no", "nn", "da", "fi", "pl", "cs", "sk", "sl", "hu", "ro", "hr", "bg", "ru", "uk", "tr" ], "type": "string", "description": "Language of the conversation (ISO 639-1). Links open our comparison page in that language when it exists, otherwise in English. Default \"en\"." }, "itinerary": { "type": "array", "items": { "type": "object", "required": [ "destination" ], "properties": { "destination": { "type": "string", "maxLength": 80, "minLength": 2, "description": "Country, ISO 3166-1 alpha-2 code, well-known city or region of this stage, as the traveller named it. Never their home country." }, "durationDays": { "type": "integer", "maximum": 365, "minimum": 1, "description": "Days spent in this stage, when known." } }, "additionalProperties": false }, "maxItems": 8, "minItems": 1, "description": "The stages of the trip in travel order (1 to 8). A stage is a country, a well-known city or one of the regions (Europe, Asia…)." }, "unlimited": { "type": "boolean", "description": "true = unlimited plans only; false = fixed-data plans only; omit for both." }, "totalDurationDays": { "type": "integer", "maximum": 365, "minimum": 1, "description": "Whole trip length in days, when the stages are not dated one by one (a single plan must last this long)." } }, "additionalProperties": false }

{ "type": "object", "required": [ "destination" ], "properties": { "sort": { "enum": [ "value", "cheapest", "data", "days" ], "type": "string", "description": "value (default) = the cheapest plan that covers the data need (given, or assumed standard use) for the trip length; with unlimited=true and no figure, the lowest price per GB of fair use; cheapest = lowest total price; data = most data; days = longest validity. The need and trip length filter every sort." }, "limit": { "type": "integer", "maximum": 10, "minimum": 1, "description": "Number of plans to return (default 5)." }, "dataGb": { "type": "number", "maximum": 1000, "description": "Minimum data in GB, when the traveller gives a figure. Unlimited plans always qualify.", "exclusiveMinimum": 0 }, "currency": { "enum": [ "USD", "EUR", "GBP", "CAD", "AUD", "JPY", "CNY", "KRW", "INR", "THB", "IDR", "MYR", "SGD", "PHP", "VND", "PKR", "BDT", "LKR", "AED", "SAR", "ILS", "TRY", "ZAR", "KES", "NGN", "EGP", "MAD", "BRL", "MXN", "COP", "CLP", "PEN", "NZD", "CHF", "SEK", "NOK", "DKK", "PLN", "CZK", "HUF", "RON", "BGN", "RUB" ], "type": "string", "description": "Currency to show prices in (ISO 4217, e.g. \"EUR\", \"GBP\", \"USD\"): pass the traveller's currency whenever you know it (their country, their words, prices they quoted). Default: the currency of the MyBestSim page in the conversation language (EUR for fr, de, es, it, nl, pt…; USD for en; GBP is never assumed). Prices are converted exactly as that page shows them." }, "dataNeed": { "enum": [ "light", "standard", "heavy" ], "type": "string", "description": "Data appetite when no figure is given: light ≈ 0.3 GB/day (maps, messaging), standard ≈ 0.7 GB/day (social, some video), heavy ≈ 1.5 GB/day (streaming, hotspot). Multiplied by durationDays; without it a 7-day trip is assumed, and plans valid for fewer than 7 days are excluded. Ignored when dataGb is set." }, "features": { "type": "array", "items": { "enum": [ "fiveG", "hotspot", "calls", "sms" ], "type": "string" }, "maxItems": 4, "description": "Features every returned plan must include." }, "language": { "enum": [ "fr", "en", "de", "es", "it", "nl", "pt", "ja", "ko", "sv", "no", "nn", "da", "fi", "pl", "cs", "sk", "sl", "hu", "ro", "hr", "bg", "ru", "uk", "tr" ], "type": "string", "description": "Language of the conversation (ISO 639-1). Links open our comparison page in that language when it exists, otherwise in English. Default \"en\"." }, "unlimited": { "type": "boolean", "description": "true = unlimited plans only; false = fixed-data plans only; omit for both." }, "destination": { "type": "string", "maxLength": 80, "minLength": 2, "description": "Where the traveller is going, as they named it: a country in English or another common language (\"Japan\", \"Japon\"), an ISO 3166-1 alpha-2 code (\"JP\"), a well-known city (\"Tokyo\"), or one of the regions Europe, Asia, Africa, North America, South America, World, Balkans. Never the traveller's home country." }, "maxPriceUsd": { "type": "number", "maximum": 1000, "description": "Maximum total price in USD.", "exclusiveMinimum": 0 }, "durationDays": { "type": "integer", "maximum": 365, "minimum": 1, "description": "Trip length in days: plans valid for fewer days are excluded. Default 7 (reported in assumptions)." } }, "additionalProperties": false }