Simsima Connectivity
REMOTE · MCP.SIMSIMA.IO · SCANNED SEP 20
Search, recommend & buy travel eSIM data plans for 190+ destinations via AI agents.
Available components
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. How we score → Why this is hard to score →
Endpoint Security66
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- Authorisation not fully verified: no authorisation is required to call this server, and 7 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe. See how to fix → View diagnostics → Unverified
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- The HSTS (Strict-Transport-Security) header is present. View diagnostics → Pass
- DNSSEC is configured correctly; the domain's records validate against the full chain to the root. View diagnostics → Pass
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability51
- AI-judged instruction clarity (fair).Partial
- Tool/resource definitions use about 344 tokens (~49/item across 7 items; 7 tools + 0 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management100
- No destabilizing schema changes in the last 30 days.Pass
Tool Coverage67
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 0% of tool parameters carry a description.Fail
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 7 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 7 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
How do I install the Simsima Connectivity MCP server?
Simsima Connectivity is a hosted endpoint at https://mcp.simsima.io/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.
remote · mcp.simsima.io
claude mcp add --transport http willyfab-simsima-connectivity 'https://mcp.simsima.io/mcp'
{
"mcpServers": {
"willyfab-simsima-connectivity": {
"url": "https://mcp.simsima.io/mcp"
}
}
} {
"servers": {
"willyfab-simsima-connectivity": {
"type": "http",
"url": "https://mcp.simsima.io/mcp"
}
}
} [mcp_servers.willyfab-simsima-connectivity] url = "https://mcp.simsima.io/mcp"
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"willyfab-simsima-connectivity": {
"type": "remote",
"url": "https://mcp.simsima.io/mcp",
"enabled": true
}
}
} openclaw mcp add willyfab-simsima-connectivity --url 'https://mcp.simsima.io/mcp' --transport streamable-http
mcp_servers:
willyfab-simsima-connectivity:
url: "https://mcp.simsima.io/mcp" {
"McpServers": {
"willyfab-simsima-connectivity": {
"Transport": "http",
"Url": "https://mcp.simsima.io/mcp"
}
}
} assistant mcp add willyfab-simsima-connectivity -t streamable-http -u 'https://mcp.simsima.io/mcp'
{
"mcpServers": {
"willyfab-simsima-connectivity": {
"type": "http",
"url": "https://mcp.simsima.io/mcp"
}
}
} The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 4 Sept 26 +1
- DNSSEC: fail → pass ▲ security
- 26 Aug 26 +2
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 25 Aug 26 0
- Stability: 0.97 → pass security
- Schema quality: 241 → 344 ▼ functional
- New tool “check_coverage” functional
- New tool “get_destination_info” functional
- 24 Aug 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 93 to 97. That category is still filling its 30-day observation window: 28 days of observed history at the previous scan, 29 at this one. The score rises as the window fills, whether or not the server changes.
- 11 Aug 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 31 Jul 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 30 Jul 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 27 Jul 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 20 Sept 2026 · Probed https://mcp.simsima.io/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=simsima.io | CN=WE1,O=Google Trust Services,C=US | 4 Sept 2026 | 3 Dec 2026 | ECDSA 256 | ECDSA-SHA256 | 8648e777789247be0ea1af82c8ae7533 |
| SANs: simsima.io, *.simsima.io | ||||||
| CN=WE1,O=Google Trust Services,C=US (CA) | CN=GTS Root R4,O=Google Trust Services LLC,C=US | 13 Dec 2023 | 20 Feb 2029 | ECDSA 256 | ECDSA-SHA384 | 7ff31977972c224a76155d13b6d685e3 |
| CN=GTS Root R4,O=Google Trust Services LLC,C=US (CA) | CN=GlobalSign Root CA,OU=Root CA,O=GlobalSign nv-sa,C=BE | 15 Nov 2023 | 28 Jan 2028 | ECDSA 384 | SHA256-RSA | 7fe530bf331343bedd821610493d8a1b |
Background: What to check on a remote MCP endpoint →
DNSSEC secure
Validation of mcp.simsima.io. — Secure
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| io. | present | 57355 | 8 | Verified |
| simsima.io. | present | 2371 | 13 | Verified |
| mcp.simsima.io. | Verified address RRset verified with the apex keys |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
| Header | Value |
|---|---|
| strict-transport-security | max-age=15552000 |
| x-content-type-options | nosniff |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://mcp.simsima.io/mcp | Verified | 200 | |
| http (plaintext) | http://mcp.simsima.io/mcp | HTTPS enforced | 301 | https://mcp.simsima.io/mcp |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
check_coverage Check whether a destination covers a country ~61
Answer "does this eSIM work in <country>" for a destination (country, region or global plan). Accepts a country name or ISO code.
| Name | Type | Req | Description |
|---|---|---|---|
| country | string | yes | – |
| destination | string | yes | – |
| locale | string | – | – |
No output schema declared.
No examples provided.
create_checkout_link Create an attributed checkout link ~55
Return a Simsima product URL with agent attribution, for the user to complete checkout.
| Name | Type | Req | Description |
|---|---|---|---|
| agentSource | string | yes | – |
| destination | string | – | – |
| locale | string | – | – |
| sku | string | – | – |
No output schema declared.
No examples provided.
get_destination_info Get destination coverage and networks ~42
Coverage (ISO country codes), mobile operators, top-up availability and entry price for a destination.
| Name | Type | Req | Description |
|---|---|---|---|
| destination | string | yes | – |
| locale | string | – | – |
No output schema declared.
No examples provided.
get_plan Get eSIM plan detail ~30
Get a single plan by its sku.
| Name | Type | Req | Description |
|---|---|---|---|
| locale | string | – | – |
| sku | string | yes | – |
No output schema declared.
No examples provided.
list_destinations List eSIM destinations ~32
List destinations (countries) Simsima covers, with min price and product URL.
| Name | Type | Req | Description |
|---|---|---|---|
| locale | string | – | – |
No output schema declared.
No examples provided.
recommend_plan Recommend an eSIM plan ~53
Recommend the best plan(s) for a trip given its length and data usage.
| Name | Type | Req | Description |
|---|---|---|---|
| destination | string | yes | – |
| locale | string | – | – |
| tripDays | integer | yes | – |
| usage | string | yes | – |
No output schema declared.
No examples provided.
search_plans Search eSIM plans ~71
Search plans for a destination (country name or slug), with optional filters.
| Name | Type | Req | Description |
|---|---|---|---|
| destination | string | yes | – |
| locale | string | – | – |
| maxPrice | number | – | – |
| maxValidityDays | number | – | – |
| minDataGB | number | – | – |
| unlimited | boolean | – | – |
No output schema declared.
No examples provided.
What is the Simsima Connectivity MCP server?
Simsima Connectivity is an MCP server listed in the public MCP registry as io.github.Willyfab/simsima-connectivity. Search, recommend & buy travel eSIM data plans for 190+ destinations via AI agents. This page covers its hosted endpoint (https://mcp.simsima.io/mcp).
Is the Simsima Connectivity MCP server safe to use?
Simsima Connectivity scores 75 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 Simsima Connectivity MCP server expose?
Simsima Connectivity exposes 7 tools: list_destinations, search_plans, get_plan, recommend_plan, create_checkout_link, and 2 more. Their descriptions and schemas cost roughly 344 tokens of context every time the server is loaded.
Does the Simsima Connectivity MCP server require authentication?
No. We connected to Simsima Connectivity without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the Simsima Connectivity MCP server still maintained?
Simsima Connectivity is still listed as active in the MCP registry. We last reached this channel on 20 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.