Cypher eSIM
com.cypheresim/esimcypheresim.comstreamable-httpv1.0.0Scanned
Buy no-KYC travel eSIMs and eSIMs with a real phone number in 180+ countries, paid in crypto.
9 tools: 1 can delete or cancel things, 1 do something that can't be undone, 1 change things and 6 only read.
- Reads private data · 1
- Reads text others write · 2
- Can send data out · 0
- No findings
Anlyon alternative
3 of these tools change something. Run those as governed actions.
Declare what an action changes, and Anlyon puts it under a shared limit, binds every approval to the exact request, and grades the outcome. It works on any HTTPS API you can describe as an action.
Anlyon does not run, proxy or govern this MCP server. A tool your own code calls directly is not routed through Anlyon and is not governed by it.
Import an OpenAPI spec →Tools
Grouped by what each tool does, most consequential first. Open one for its reasons and full description; descriptions are the publisher's own words.
9 tools
Deletes or cancels 1Claude Code: deny
cancel_orderCancel an unpaid order the person decided not to pay.No findings
Why it is in this group
- The name "cancel_order" says "cancel": a word for removing or ending something.
- The server marks it destructive (destructiveHint: true).
Description, as the server wrote it Cancel an unpaid order the person decided not to pay. Do not cancel after the payment was sent.
Annotations the server declares
- title: Cancel order
- readOnlyHint: false
- destructiveHint: true
- idempotentHint: true
- openWorldHint: false
Can't be undone 1Claude Code: ask
create_topupCreate a crypto invoice that adds a data plan to an existing eSIM (no new QR, nothing to install).Reads text others writeNo findings
Why it is in this group
- The name "create_topup" says "create": a word for a change.
- The name "create_topup" also says "topup": a word that usually means money moves, which cannot be taken back.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it Create a crypto invoice that adds a data plan to an existing eSIM (no new QR, nothing to install). plan_id must come from list_topups for this ICCID. Payment and polling work exactly like create_order.
Annotations the server declares
- title: Create top-up
- readOnlyHint: false
- destructiveHint: false
- idempotentHint: false
- openWorldHint: true
Changes things 1Claude Code: ask
create_orderCreate a crypto invoice for one new eSIM.Reads text others writeNo findings
Why it is in this group
- The name "create_order" says "create": a word for a change.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it Create a crypto invoice for one new eSIM. Before calling, confirm the plan with the person and tell them when validity starts and the plan notes (number plans: validity starts at installation; Europe number is French +33; UK number plan: install only after arrival). Returns order_id, order_token, the exact amount and the address. The person must send exactly that amount on that network before expires_at. Then poll get_order. Unpaid invoices per client are limited; cancel unused ones with cancel_order.
Annotations the server declares
- title: Create order
- readOnlyHint: false
- destructiveHint: false
- idempotentHint: false
- openWorldHint: true
Only reads 6Show 6 read-only tools
get_orderOrder status: pending (waiting for payment), paid (issuing), delivered, expired, failed.No findings
Why it is in this group
- The name "get_order" says "get": a word for reading.
Description, as the server wrote it Order status: pending (waiting for payment), paid (issuing), delivered, expired, failed. When delivered, returns for each eSIM: QR code (also as an image), LPA activation code, ICCID, and one-tap iOS/Android install links. Call at most once every 5 seconds.
Annotations the server declares
- title: Get order
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: false
- openWorldHint: false
get_planFull details of one plan: all covered countries, data, days, phone number (if any), install rules, when validity starts, and notes.Reads private dataNo findings
Why it is in this group
- The name "get_plan" says "get": a word for reading.
What it can reach
- private-dataThe description's first sentence says "note": it reads notes.
Description, as the server wrote it Full details of one plan: all covered countries, data, days, phone number (if any), install rules, when validity starts, and notes. Read the notes to the person before create_order.
Annotations the server declares
- title: Get plan
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
list_payment_coinsCoins and networks accepted for payment.No findings
Why it is in this group
- The name "list_payment_coins" says "list": a word for reading.
Description, as the server wrote it Coins and networks accepted for payment. Pass coin and network to create_order. Sending on a different network loses the funds.
Annotations the server declares
- title: List payment coins
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
list_plansList purchasable plans for a destination, cheapest first.No findings
Why it is in this group
- The name "list_plans" says "list": a word for reading.
Description, as the server wrote it List purchasable plans for a destination, cheapest first. type "data" = data-only eSIM: validity starts on first connection at the destination. type "number" = eSIM with a phone number, calls and SMS: validity starts at installation, so install it just before use; Europe plans give a French +33 number; the UK number plan must be installed only after arrival in the UK. For a country without its own plans, regional and world plans that cover it are returned. Prices are final USD prices; the crypto amount is set at create_order.
Annotations the server declares
- title: List plans
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
list_topupsCheck whether an installed Cypher eSIM can be topped up and list the plans that can be added to it.No findings
Why it is in this group
- The name "list_topups" says "list": a word for reading.
Description, as the server wrote it Check whether an installed Cypher eSIM can be topped up and list the plans that can be added to it.
Annotations the server declares
- title: List top-ups
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
search_destinationsFind a country, region or "world" destination by name or ISO code.No findings
Why it is in this group
- The name "search_destinations" says "search": a word for reading.
Description, as the server wrote it Find a country, region or "world" destination by name or ISO code. Returns destination codes for list_plans (country: ISO2 like "JP"; region: like "R-EUROPE"; world: "WORLD"), starting prices in USD, and how many data and phone-number plans exist. An empty query lists all destinations.
Annotations the server declares
- title: Search destinations
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.
Exfil surface
Which tools read private data, which read text someone else can write, and which can send data out. One of each is a path a prompt injection can use.
No private-data, untrusted-input, outbound path in this server alone: no tool is tagged outbound.
- Reads private data1
- Reads files, mail, messages, databases, secrets, calendars or repositories.
- Reads text others write2
- Brings in text someone else can write: web pages, inbound email, messages, issues and comments.
- Can send data out0
- Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.
Other servers in the same agent add their own tools to these paths. Audit your whole setup to see them together.
Findings
Matches of fixed checks, with the text they matched.
No check matched anything in these tool definitions. That is not a safety guarantee.
History
Changes to its tool definitions and to its remote endpoint, newest first.
No change seen yet. Its tools are rescanned every day, and a remote endpoint is looked at once a week.
Install
Pinned to version 1.0.0. Values in angle brackets are yours to fill in.
claude mcp add --transport http esim https://cypheresim.com/mcpclaude mcp add --transport http esim https://cypheresim.com/mcpRun in a terminal.
Claude Code permissions
Allow the reads, ask before a change or a way out, deny the deletes. Paste into .claude/settings.json.
{
"permissions": {
"allow": [
"mcp__esim__search_destinations",
"mcp__esim__list_plans",
"mcp__esim__get_plan",
"mcp__esim__list_payment_coins",
"mcp__esim__get_order",
"mcp__esim__list_topups"
],
"ask": [
"mcp__esim__create_order",
"mcp__esim__create_topup"
],
"deny": [
"mcp__esim__cancel_order"
]
}
}Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. A read that can send data out (it takes a URL, say) asks first too. It assumes the server is installed as esim. Review it before you use it.
Capability tags behind 3 rules
- mcp__esim__get_plan private-data
- mcp__esim__create_order untrusted-input
- mcp__esim__create_topup untrusted-input
Pin
Keep the decision: fail CI when the tools change, follow every change, or show a badge.
Pin in CI
Fail a build when the tools you reviewed are not the tools the server serves today.
curl -s "https://anlyon.dev/api/v1/servers/com.cypheresim/esim/verify?hash=2cc12847267dca69803ae0239d23ec2226499f477b2ecaa7787e4252c2829ab2" | jq -e '.changed == false'Pinned hash 2cc12847267d, from Oct 23, 2026, 15:19 UTC.
Watch
Get told when its tools change: a new tool, a new description, a new class.
https://anlyon.dev/servers/com.cypheresim/esim/changes.xmlAn Atom feed. Works in any feed reader or Slack's RSS app.
Badge
[](https://anlyon.dev/servers/com.cypheresim/esim)Source: MCP Registry. Synced Oct 23, 2026, 15:17 UTC.