ALT eSIM
REMOTE · ALTESIM.COM
Search & buy travel data eSIMs for 70+ destinations — pay by Stripe link, get the eSIM QR. USD.
Available components
Last scanned (22 hours ago)
Scores higher than 84% of remote servers
Reachable. Last reached 4 Nov 2026.
Category E-commerce
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 Security63
- 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 check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability75
- AI-judged instruction clarity (excellent).Pass
- Context-footprint check failed: tool/resource definitions use about 919 tokens (~131/item across 7 items; 7 tools + 0 resources), over budget; trim descriptions and params. See how to fix → Fail
- 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 Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
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 8 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
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.
- 29 Oct 26 0
- The server rewrote its instructions, which are the text every model session reads security
- Tool “list_destinations” rewrote its description, which is the text the model reads security
- Schema quality: 657 → 919 ▼ functional
- Server version: 1.31.0 → 1.32.0 functional
- New tool “get_shop_facts” functional
- New tool “recommend_plans” functional
- 28 Oct 26 0
- Server version: 1.29.0 → 1.31.0 functional
- 27 Oct 26 0
- Server version: 1.28.16 → 1.29.0 functional
- 22 Oct 26 0
- Server version: 1.28.15 → 1.28.16 functional
- 20 Oct 26 0
- Server version: 1.28.13 → 1.28.15 functional
- 17 Oct 26 0
- Server version: 1.28.9 → 1.28.13 functional
- 15 Oct 26 0
- Server version: 1.28.8 → 1.28.9 functional
- 14 Oct 26 0
- Server version: 1.28.6 → 1.28.8 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 4 Nov 2026 · Probed https://altesim.com/api/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=altesim.com | CN=WE1,O=Google Trust Services,C=US | 9 Sept 2026 | 8 Dec 2026 | ECDSA 256 | ECDSA-SHA256 | 6ba4c5a5459ea3500e2d325306042da2 |
| SANs: altesim.com, *.altesim.com | ||||||
| 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 insecure
Validation of altesim.com. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| com. | present | 19718 | 13 | Verified |
| altesim.com. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
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=63072000; includeSubDomains; preload |
| content-security-policy | default-src 'self'; script-src 'self' 'unsafe-inline' 'unsafe-eval' https://js.stripe.com https://*.firebaseapp.com https://apis.google.com https://www.googletagmanager.com https://www.google-analytics.com https://accounts.google.com https://static.cloudflareinsights.com https://www.google.com https://www.gstatic.com; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com https://accounts.google.com; font-src 'self' data: https://fonts.gstatic.com; img-src 'self' data: blob: https:; connect-src 'self' https://*.googleapis.com https://*.firebaseio.com https://api.stripe.com https://apiext1.multi-byte.io https://mall.multi-byte.com wss://*.firebaseio.com https://www.google-analytics.com https://*.google-analytics.com https://*.analytics.google.com https://www.googletagmanager.com https://accounts.google.com https://edm-api-nguhrk2wgq-de.a.run.app https://cloudflareinsights.com https://www.google.com https://rental-api.anlander.com; frame-src 'self' https://js.stripe.com https://hooks.stripe.com https://* |
| x-content-type-options | nosniff |
| x-frame-options | SAMEORIGIN |
| referrer-policy | strict-origin-when-cross-origin |
| permissions-policy | camera=(), microphone=(), geolocation=(self), interest-cohort=() |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://altesim.com/api/mcp | Verified | 200 | |
| http (plaintext) | http://altesim.com/api/mcp | HTTPS enforced | 301 | https://altesim.com/api/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 →
create_checkout ~195
Create a secure Stripe payment link for an Alt eSIM plan. Returns a payment URL the BUYER opens to pay (the agent never handles card details) AND a checkout_session_id. After the buyer pays, call get_qr_code with that checkout_session_id to fetch the eSIM QR and show it to the buyer. The QR is also emailed. Charged in USD. You MUST collect the buyer's real email.
| Name | Type | Req | Description |
|---|---|---|---|
| customer_code | string | – | Optional Alt customer code (format Alt-XXXXXXXX, shown on the buyer's altesim.com account page). If provided, the order is linked to that account and appears in its order history regardless of the de… |
| string | yes | Buyer's email — the eSIM QR code is also sent here. | |
| lang | string | – | Delivery email language (default 'en'). |
| sku_or_id | string | yes | The plan sku or id to buy. |
No output schema declared.
No examples provided.
get_esim_plan ~73
Get one Alt eSIM plan by its sku or id. Returns full details: title, data amount, validity days, USD price, coverage carriers, product URL.
| Name | Type | Req | Description |
|---|---|---|---|
| sku_or_id | string | yes | The plan sku (e.g. 'eSIM_Alt_JP_1DG1') or id. |
No output schema declared.
No examples provided.
get_qr_code ~169
Fetch the eSIM QR code(s) for an order, to show the buyer directly. Pass the checkout_session_id from create_checkout. Returns a clear `status`: 'awaiting_payment' (buyer has NOT paid — tell them to pay), 'processing' (paid, eSIM still provisioning — retry in ~30s), 'manual_review' (paid, activation paused for security review; ask buyer to contact support@altesim.com with the order reference), 'ready' (returns the QR image(s) + ICCID(s) to display), 'expired', 'refunded', or 'failed'. Use the status to tell the buyer exactly what's happening — never assume payment succeeded.
| Name | Type | Req | Description |
|---|---|---|---|
| checkout_session_id | string | yes | The checkout_session_id from create_checkout (Stripe session id). |
No output schema declared.
No examples provided.
get_shop_facts ~51
Shop rules for Alt eSIM in the shop's own words: product model, currency, refund policy, payment/delivery, and how agents must quote prices/URLs. Call this before recommending or buying.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
list_destinations ~47
List all Alt eSIM destinations (country/region slugs with English names and region). Use a slug as the 'country' argument for search_esim_plans / recommend_plans.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
recommend_plans ~178
Recommend up to a few real catalog plans for one destination. Ranks existing SKUs by trip days and usage (light≈0.5 / normal≈1.5 / heavy≈4 GB/day) — never invents prices or URLs. Prefer this for 'what should I buy?'.
| Name | Type | Req | Description |
|---|---|---|---|
| country | string | yes | Destination slug, e.g. 'japan', 'thailand', 'europe'. |
| days | number | – | Trip length in days (optional). Prefers plans whose validity is close. |
| limit | number | – | How many plans to return (1–8, default 3). |
| max_price_usd | number | – | Optional max USD price filter. |
| usage | string | – | Data intensity: light≈0.5, normal≈1.5, heavy≈4 GB/day (ranking only). |
No output schema declared.
No examples provided.
search_esim_plans ~135
Search Alt eSIM travel data plans. Filter by destination country slug (e.g. 'japan', 'usa', 'europe'), region, and/or max USD price. Returns plans with sku, data amount, validity days, USD price and coverage carriers. All prices are USD.
| Name | Type | Req | Description |
|---|---|---|---|
| country | string | – | Destination country/region slug, e.g. 'japan', 'south-korea', 'thailand', 'usa', 'europe'. Omit to list all. |
| max_price_usd | number | – | Optional max price in USD. |
| region | string | – | Optional region filter. |
No output schema declared.
No examples provided.
How do I install the ALT eSIM MCP server?
ALT eSIM is a hosted endpoint at https://altesim.com/api/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 · altesim.com
claude mcp add --transport http com-altesim-esim 'https://altesim.com/api/mcp'
What is the ALT eSIM MCP server?
ALT eSIM is an MCP server listed in the public MCP registry as com.altesim/esim. Search & buy travel data eSIMs for 70+ destinations, pay by Stripe link, get the eSIM QR. USD. This page covers its hosted endpoint (https://altesim.com/api/mcp).
Is the ALT eSIM MCP server safe to use?
ALT eSIM scores 81 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 ALT eSIM MCP server expose?
ALT eSIM exposes 7 tools: get_shop_facts, list_destinations, search_esim_plans, recommend_plans, get_esim_plan, and 2 more. Their descriptions and schemas cost roughly 848 tokens of context every time the server is loaded.
Does the ALT eSIM MCP server require authentication?
No. We connected to ALT eSIM without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the ALT eSIM MCP server still maintained?
ALT eSIM is still listed as active in the MCP registry. We last reached this channel on 4 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.