Commerce for Agents

Compare Travel eSIMs

compare-esims

Read-onlyIdempotent

Use this when the user wants a travel eSIM, compares eSIM data plans for a trip abroad, or asks for the cheapest eSIM for a country. Ranks a curated catalog of country eSIM packages (Airalo, Saily, Ubigi, Holafly, Nomad) by USD list price among packages valid for the whole trip with at least the data needed, listing each provider's cheapest package first and then the remaining packages by price, and shows price per GB and per day with a provider link. Destinations: AU, BR, CA, CO, DE, ES, FR, GB, GR, IT, JP, KR, MX, NL, PT, TH, TR, US. Inputs: destination (country code), days, optional data_gb, unlimited and providers. No personal data is used. Keywords: travel eSIM, eSIM for Japan, cheapest eSIM, international data plan, roaming.

Input Schema

TableJSON Schema

Name	Required	Description
`days`	Yes	Trip length in days; packages must be valid at least this long.
`data_gb`	No	Minimum data needed in GB (default 1). Ignored when unlimited is true.
`providers`	No	Only these providers, e.g. ["Airalo", "Saily"].
`unlimited`	No	true: only unlimited-data packages; false: exclude them; omitted: unlimited packages also qualify.
`destination`	Yes	Destination country, ISO 3166-1 alpha-2 (e.g. JP, US, GB). Supported: AU, BR, CA, CO, DE, ES, FR, GB, GR, IT, JP, KR, MX, NL, PT, TH, TR, US.

Output Schema

TableJSON Schema

Name	Required	Description
`days`	Yes
`basis`	Yes
`closest`	No	When nothing qualifies: the largest package that lasts the trip.
`message`	No
`results`	Yes
`excluded`	Yes
`disclosure`	Yes
`destination`	Yes
`catalogVerifiedOldest`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedOct 15, 2026

changedInput schema / properties / destination / description

Previous value: -"Destination country, ISO 3166-1 alpha-2 (e.g. JP, US, GB, FR, IT, ES, TH, MX)."New value: +"Destination country, ISO 3166-1 alpha-2 (e.g. JP, US, GB). Supported: AU, BR, CA, CO, DE, ES, FR, GB, GR, IT, JP, KR, MX, NL, PT, TH, TR, US."

Changed2 schema fields changedOct 15, 2026
- addedOutput schema / properties / closest / properties / offerTargetUrl
```
Added value: +{
+  "description": "Where offerUrl redirects to.",
+  "type": "string"
+}
```
- addedOutput schema / properties / results / items / properties / offerTargetUrl
```
Added value: +{
+  "description": "Where offerUrl redirects to.",
+  "type": "string"
+}
```
AddedOct 2, 2026

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