# MyBestSim eSIM comparator (remote · mcp.mybestsim.com)

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

- Trust score: 84/100 (high trust)
- Change this week: +4
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-11-05

## Components

- remote · `mcp.mybestsim.com`: 84/100 (this document), [markdown](https://verifymcp.io/servers/com-mybestsim-esim-comparator/mcp.md), [page](https://verifymcp.io/servers/com-mybestsim-esim-comparator/mcp)

## Channel facts

- Endpoint: `https://mcp.mybestsim.com/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.1.0`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-11-05.

- **Endpoint Security**: 83/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one.
  - HTTPS is enforced; there's no plaintext access path.
  - The HSTS (Strict-Transport-Security) header is present.
  - DNSSEC is configured correctly; the domain's records validate against the full chain to the root.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 72/100
  - 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 2464 tokens (~492/item across 5 items; 4 tools + 1 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 67/100
  - Stability observed for 20 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
  - Structured output schemas are declared (100% of tools); any adoption earns full credit.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 4 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 6 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.
  - Supports UI / widget rendering.

## Install

### How do I install the MyBestSim eSIM comparator MCP server?

MyBestSim eSIM comparator is a hosted endpoint at https://mcp.mybestsim.com/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add --transport http com-mybestsim-esim-comparator 'https://mcp.mybestsim.com/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "com-mybestsim-esim-comparator": {
      "url": "https://mcp.mybestsim.com/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "com-mybestsim-esim-comparator": {
      "type": "http",
      "url": "https://mcp.mybestsim.com/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.com-mybestsim-esim-comparator]
url = "https://mcp.mybestsim.com/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "com-mybestsim-esim-comparator": {
      "type": "remote",
      "url": "https://mcp.mybestsim.com/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add com-mybestsim-esim-comparator --url 'https://mcp.mybestsim.com/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  com-mybestsim-esim-comparator:
    url: "https://mcp.mybestsim.com/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "com-mybestsim-esim-comparator": {
      "Transport": "http",
      "Url": "https://mcp.mybestsim.com/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add com-mybestsim-esim-comparator -t streamable-http -u 'https://mcp.mybestsim.com/mcp'
```

### Other

```json
{
  "mcpServers": {
    "com-mybestsim-esim-comparator": {
      "type": "http",
      "url": "https://mcp.mybestsim.com/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-11-05 (score 84, +1)

No change was recorded against any check on this day. Stability & Change Management went from 63 to 67. That category is still filling its 30-day observation window: 19 days of observed history at the previous scan, 20 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-11-03 (score 83, +1)

No change was recorded against any check on this day. Stability & Change Management went from 57 to 60. That category is still filling its 30-day observation window: 17 days of observed history at the previous scan, 18 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-11-01 (score 82, +1)

No change was recorded against any check on this day. Stability & Change Management went from 50 to 53. That category is still filling its 30-day observation window: 15 days of observed history at the previous scan, 16 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-30 (score 81, +1)

No change was recorded against any check on this day. Stability & Change Management went from 43 to 47. That category is still filling its 30-day observation window: 13 days of observed history at the previous scan, 14 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-28 (score 80, +1)

No change was recorded against any check on this day. Stability & Change Management went from 37 to 40. That category is still filling its 30-day observation window: 11 days of observed history at the previous scan, 12 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-26 (score 79, +1)

No change was recorded against any check on this day. Stability & Change Management went from 30 to 33. That category is still filling its 30-day observation window: 9 days of observed history at the previous scan, 10 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-24 (score 78, +1)

No change was recorded against any check on this day. Stability & Change Management went from 23 to 27. That category is still filling its 30-day observation window: 7 days of observed history at the previous scan, 8 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-21 (score 77, +1)

No change was recorded against any check on this day. Stability & Change Management went from 13 to 17. That category is still filling its 30-day observation window: 4 days of observed history at the previous scan, 5 at this one. The score rises as the window fills, whether or not the server changes.

## MCP tools (4)

### `search_esim_plans` (~760 tokens)

Compare travel 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.

Input parameters:

- `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 MyBe…
- `dataGb` (number): Minimum data in GB, when the traveller gives a figure. Unlimited plans always qualify.
- `dataNeed` (string): 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 i…
- `destination` (string, 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 regio…
- `durationDays` (integer): Trip length in days: plans valid for fewer days are excluded. Default 7 (reported in assumptions).
- `features` (array): Features every returned plan must include.
- `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".
- `limit` (integer): Number of plans to return (default 5).
- `maxPriceUsd` (number): Maximum total price in USD.
- `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 =…
- `unlimited` (boolean): true = unlimited plans only; false = fixed-data plans only; omit for both.

Output parameters:

- `assumptions` (object): What was assumed because the traveller did not say it (null = given). Ask for the real value to refine.
- `comparisonUrl` (string)
- `currency` (string): Currency of price, pricePerGb and totals (ISO 4217).
- `currencySymbol` (string): Symbol the MyBestSim page uses for that currency.
- `destination` (object)
- `language` (string)
- `matched` (integer): Plans matching the criteria, before the shortlist.
- `minDataGb` (number|null)
- `minDurationDays` (integer|null): Minimum validity applied (given, or assumed); null when none.
- `plans` (array)
- `sort` (string)
- `totalPlans` (integer): Plans listed on the comparison page of the destination.

### `plan_trip_esim` (~637 tokens)

Plan eSIMs for a multi-country trip

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.

Input parameters:

- `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 MyBe…
- `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.
- `dataNeed` (string): 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` (array): Features every proposed plan must include.
- `itinerary` (array, required): 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…).
- `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".
- `totalDurationDays` (integer): Whole trip length in days, when the stages are not dated one by one (a single plan must last this long).
- `unlimited` (boolean): true = unlimited plans only; false = fixed-data plans only; omit for both.

Output parameters:

- `assumptions` (object): What was assumed because the traveller did not say it (null = given). Ask for the real value to refine.
- `combination`
- `currency` (string): Currency of price, pricePerGb and totals (ISO 4217).
- `currencySymbol` (string): Symbol the MyBestSim page uses for that currency.
- `dataGb` (number|null): Data needed for the whole trip; null for unlimited-only.
- `kind` (string)
- `language` (string)
- `optionsByEsimCount` (array): Cheapest real total for each possible number of eSIMs (every split of the stages compared), to show what one more or one fewer eSIM costs.
- `perStage`
- `plansCoveringAllStages` (integer): Plans proven to cover every stage (listed on the page of each stage, or with a catalogue line in each country of the trip), before the length/data/feature criteria.
- `recommendation`
- `singlePlan`
- `singlePlanAlternatives` (array): Other single plans covering every stage (up to 2).
- `stages` (array)
- `totalDays` (integer)

### `get_destination_overview` (~367 tokens)

Travel eSIM prices for a destination

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.

Input parameters:

- `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 MyBe…
- `destination` (string, 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 regio…
- `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".

Output parameters:

- `bestPricePerGb`
- `cheapest`
- `cheapestUnlimited`
- `comparisonUrl` (string)
- `currency` (string): Currency of price, pricePerGb and totals (ISO 4217).
- `currencySymbol` (string): Symbol the MyBestSim page uses for that currency.
- `destination` (object)
- `durationsDays` (array)
- `language` (string)
- `planCount` (integer)
- `providerCount` (integer)
- `typicalPrices`

### `get_esim_plan` (~293 tokens)

Travel eSIM plan detail

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.

Input parameters:

- `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 MyBe…
- `destination` (string, 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 regio…
- `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".
- `planId` (string, required): planId returned by search_esim_plans.

Output parameters:

- `comparisonUrl` (string)
- `currency` (string): Currency of price, pricePerGb and totals (ISO 4217).
- `currencySymbol` (string): Symbol the MyBestSim page uses for that currency.
- `destination` (object)
- `language` (string)
- `plan` (object)

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/com-mybestsim-esim-comparator/mcp#diagnostics

## Score history

- 2026-11-05: 84
- 2026-11-04: 83
- 2026-11-03: 83
- 2026-11-02: 82
- 2026-11-01: 82
- 2026-10-31: 81
- 2026-10-30: 81
- 2026-10-29: 80
- 2026-10-28: 80
- 2026-10-27: 79
- 2026-10-26: 79
- 2026-10-25: 78
- 2026-10-24: 78
- 2026-10-23: 77
- 2026-10-22: 77
- 2026-10-21: 77
- 2026-10-20: 76
- 2026-10-19: 76
- 2026-10-18: 75
- 2026-10-17: 75
- 2026-10-16: 74

## Common questions

### What is the MyBestSim eSIM comparator MCP server?

MyBestSim eSIM comparator is an MCP server listed in the public MCP registry as com.mybestsim/esim-comparator. Compare prepaid travel eSIM plans by destination, data and trip length; plan multi-country trips. This page covers its hosted endpoint (https://mcp.mybestsim.com/mcp).

### Is the MyBestSim eSIM comparator MCP server safe to use?

MyBestSim eSIM comparator scores 84 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the MyBestSim eSIM comparator MCP server expose?

MyBestSim eSIM comparator exposes 4 tools: search_esim_plans, plan_trip_esim, get_destination_overview, get_esim_plan. Their descriptions and schemas cost roughly 2,057 tokens of context every time the server is loaded.

### Does the MyBestSim eSIM comparator MCP server require authentication?

No. We connected to MyBestSim eSIM comparator without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the MyBestSim eSIM comparator MCP server still maintained?

MyBestSim eSIM comparator is still listed as active in the MCP registry. We last reached this channel on 5 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

## Links

- Remote endpoint: https://mcp.mybestsim.com/mcp
- Website: https://mybestsim.com/
- Changelog RSS feed: https://verifymcp.io/servers/com-mybestsim-esim-comparator/mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/com-mybestsim-esim-comparator/mcp.json
- HTML version of this page: https://verifymcp.io/servers/com-mybestsim-esim-comparator/mcp