simfuse.app
Buy a travel eSIM and get online the moment you land. QR code by email in seconds, plans for 205+ countries, no physical SIM, no roaming bills. Pay with Apple Pay or Google Pay.
First seen 2026-11-05 · Last seen 2026-11-05 · Source: webmcp.com
Answer 12 · Act 3 · Transact 1 · Score: Not yet scored
Tool inspector
plan-trip
Answer "which eSIM should I buy for this trip?". Give it the stops, a country code and the days spent in each, and it compares one plan covering the whole route against one plan per country against a mix of the two, on live prices, then flags the cheapest option that covers everything and explains the choice in a sentence you can quote. It also estimates the data each stop needs, names any country SimFuse cannot cover, and returns package ids that go straight into create-checkout-session. Use it whenever a trip has two or more countries, and for a single country when the traveller wants a recommendation rather than a list. Read-only: nothing is reserved and nothing is charged, and the totals are today's catalog prices, not a quote held for later.
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Input schema
| Property | Type | Required | Description |
|---|---|---|---|
stops |
array | yes | The trip, one entry per country, in travel order. 1 to 12 stops, e.g. [{"country":"JP","days":7},{"country":"KR","days":5}]. |
usage |
string | no | Optional. Trip-wide data usage for stops that do not set their own: "light" (about 300 MB a day), "regular" (about 800 MB a day) or "heavy" (about 2 GB a day). Defaults to "regular". |
start |
string | no | Optional. Departure date as YYYY-MM-DD, e.g. "2026-04-18". Only used to date the stops in the answer; it does not change prices. Defaults to today. |
currency |
string | no | Optional. ISO 4217 three-letter code every price is quoted in, e.g. "USD", "EUR", "GBP". Defaults to EUR. An unknown code falls back to EUR rather than failing. |
Raw JSON schema
{
"properties": {
"stops": {
"description": "The trip, one entry per country, in travel order. 1 to 12 stops, e.g. [{\"country\":\"JP\",\"days\":7},{\"country\":\"KR\",\"days\":5}].",
"minItems": 1,
"maxItems": 12,
"items": {
"properties": {
"country": {
"description": "ISO 3166-1 alpha-2 country code, e.g. \"JP\" for Japan. Look one up with list-destinations rather than guessing. Each country may appear once: give one stop with the total days rather than two visits.",
"minLength": 2,
"maxLength": 2,
"type": "string"
},
"days": {
"description": "Days spent in that country, 1 to 365. Count the nights of the stay.",
"minimum": 1,
"maximum": 365,
"type": "integer"
},
"usage": {
"description": "Optional. How heavily data is used during this stop: \"light\" (about 300 MB a day, maps and messaging), \"regular\" (about 800 MB a day) or \"heavy\" (about 2 GB a day, video and hotspot). Overrides the trip-wide `usage` for this stop only.",
"enum": [
"light",
"regular",
"heavy"
],
"type": "string"
}
},
"type": "object",
"required": [
"country",
"days"
]
},
"type": "array"
},
"usage": {
"description": "Optional. Trip-wide data usage for stops that do not set their own: \"light\" (about 300 MB a day), \"regular\" (about 800 MB a day) or \"heavy\" (about 2 GB a day). Defaults to \"regular\".",
"default": "regular",
"enum": [
"light",
"regular",
"heavy"
],
"type": "string"
},
"start": {
"description": "Optional. Departure date as YYYY-MM-DD, e.g. \"2026-04-18\". Only used to date the stops in the answer; it does not change prices. Defaults to today.",
"minLength": 10,
"maxLength": 10,
"type": "string"
},
"currency": {
"description": "Optional. ISO 4217 three-letter code every price is quoted in, e.g. \"USD\", \"EUR\", \"GBP\". Defaults to EUR. An unknown code falls back to EUR rather than failing.",
"minLength": 3,
"maxLength": 3,
"type": "string"
}
},
"type": "object",
"required": [
"stops"
]
}
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