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MCP servers › com.pyungyo › mvno-plans

MCP server · registry snapshot 2026-10-23 · last tested 2026-10-23

com.pyungyo/mvno-plans

Korean MVNO(알뜰폰) mobile plans from carriers' official sites, checked 5x daily, with price history — the publisher's description

1 of 2 record checks metRead-only · tools listed 2026-10-23Topic: data-and-databases · AI-classifiedversion 2.0.0streamable HTTP10 tools

Summary

com.pyungyo/mvno-plans is a remote MCP server listed in the official MCP registry at version 2.0.0. On 2026-10-23 ProtocolProbe connected to it in read-only mode and read its inventory: 10 tools, 5 resources and 3 prompts.

Record checks

1 of 2 record checks met · 7 do not apply

  • met: Registry entry is active and says how to run it
  • not met: Source repository link opens
  • not applicable: Repository is not archived
  • not applicable: Code pushed to the repository in the 90 days before our check
  • not applicable: Repository publishes a security policy (SECURITY.md)
  • not applicable: Package names its licence with a standard (SPDX) identifier
  • not applicable: The version the registry lists can be installed and is not withdrawn
  • not applicable: npm package carries build provenance (attestation)
  • not applicable: No known critical or high advisory in the package or its dependencies
  • Not ranked by downloads: a remote server publishes no download figure
  • Not ranked by stars: no public GitHub repository

From public records, not a safety rating. Each check with its reason

Key facts

Runs
remote (hosted by the publisher)
Transport
streamable HTTP
Sign-in
none needed to open a session
Tools
10
Described as changing data
0 of 10 toolsAI-classified
Mainly works on
nothing outside itself: it only answers questionsAI-classified
Topic
data-and-databasesAI-classified
Last tested
2026-10-23

Add to your client

How fresh this is

Live-tested
yes, a real session (not a text-only review)
Last tested
2026-10-23
Mode
read-only (no tool calls)
Latest version
2.0.0, published 2026-10-15 (registry, as of the 2026-10-23 snapshot)
First listed version
2026-10-15 (earliest version still in the registry; older removed versions would be earlier)
Registry data
snapshot 2026-10-23
Package and repository
checked 2026-10-22
Engine
mcp-runtime-engine@0.1.0 · sdk@1.32.0

Changes since the last refresh

New in the registry: not in the list of 2026-10-04, listed on 2026-10-23 with version 2.0.0 (published 2026-10-15).

Source: the official MCP Registry list on 2026-10-04 and on 2026-10-23.

What it is

What does this server offer?

Observed inventory
10tools
5resources
3prompts

What it mainly works on, as our AI model read its tool descriptions: nothing outside itself: it only answers questions.

None of its 10 tools are described as changing anything.

  • searchon 763 other serversreads or searches

    “Search Korean MVNO (알뜰폰) mobile plans in plain Korean.”

    Publisher declares: read-only yes · destructive no · idempotent yes · open-world no

    1 input, 1 required
    • querystringrequired“한국어 검색어”
  • fetchon 432 other serversreads or searches

    “Fetch one plan by id: 요금·원문 근거·테더링·유심비·결합 할인·혜택 원문·가입 조건·가격 기록(날짜별)·고객센터 전화.”

    Publisher declares: read-only yes · destructive no · idempotent yes · open-world no

    1 input, 1 required
    • idstringrequired“요금제 id (예: joytel-617)”
  • search_planson 9 other serversreads or searches

    “조건을 칸으로 정해 알뜰폰 요금제를 찾습니다(통신사 공식 홈페이지 기준, 하루 5번 확인).”

    Publisher declares: read-only yes · destructive no · idempotent yes · open-world no

    21 inputs
    • typestring“lifetime=평생 할인·정가(기본) / limited=선착순·기한 한정 가입 / period=N개월 기간 할인 / nodate=종료일 안 적힌 할인 / all=전부”
    • dataMinnumber“한 달 데이터 최소 GB (매일 제공은 30일치로 계산, 무제한 포함)”
    • dataUnlimitedboolean“데이터 무제한만”
    • dailyDataboolean“매일 추가 데이터(예: 매일 2GB)를 따로 주는 요금제만”
    • qosMinnumber“데이터 다 쓴 뒤 최소 속도 kbps (예: 1000=1Mbps, 3000=3Mbps, 5000=5Mbps)”
    • feeMaxnumber“월 요금 상한(원, VAT 포함)”
    • mnostring“빌려 쓰는 통신망”
    • networkstring
    • voiceUnlimitedboolean“통화 무제한만”
    • voiceMinnumber“통화 최소 분”
    • smsUnlimitedboolean“문자 무제한만”
    • extraCallMinnumber“부가통화(전국대표번호 15XX·050·영상통화)를 따로 이 분 이상 주는 요금제만 — 공식 화면에 분이 적힌 것만 (예: 300)”
    • usimFreeboolean“요금제에 "유심 무료"가 공식 원문으로 적힌 요금제만”
    • tetheringMinnumber“공식 홈페이지에 테더링(핫스팟) 한도가 적힌 요금제 중 한 달 테더링 가능 최소 GB (1=테더링 한도 표시 전체)”
    • bundlestring“결합 혜택 원문이 있는 요금제 (internet=인터넷·유선 결합, mobile=가족·모바일 결합, any=둘 중 하나 이상)”
    • dataSharingboolean“데이터 쉐어링 가능 원문이 적힌 요금제만”
    • noConditionboolean“최소 사용량·개통 초기 유지 기간 등 가입 조건이 하나도 없는 요금제만”
    • brandstring“알뜰폰 통신사 이름 일부 (예: 이야기, 프리티, 헬로)”
    • sortstring“fee=월 요금 낮은 순(기본), data=데이터 많은 순, total24=24개월 총액 낮은 순(기간할인 포함 비교 시)”
    • comparePeriodboolean“true 로 주면 같은 조건의 기간 할인(프로모션) 최저가·할인 종료 후 인상 요금·24개월 총액 비교(periodComparison)를 함께 돌려줍니다”
    • limitnumber“1~50, 기본 10”
  • cheapest_by_datareads or searches

    “데이터 1·5·10·15·30·70·100GB 이상 구간마다 지금 가장 싼 평생 할인·정가 요금제와 기간 할인 요금제(할인 종료 후 요금·24개월 총액)를 비교합니다.”

    Publisher declares: read-only yes · destructive no · idempotent yes · open-world no

    5 inputs
    • mnostring“빌려 쓰는 통신망”
    • networkstring
    • voiceUnlimitedboolean“통화 무제한만”
    • qosMinnumber“데이터 다 쓴 뒤 최소 속도 kbps (예: 1000=1Mbps, 3000=3Mbps, 5000=5Mbps)”
    • usimFreeboolean“요금제에 "유심 무료"가 공식 원문으로 적힌 요금제만”
  • market_statson 17 other serversreads or searches

    “알뜰폰 전체 통계: 평생요금제·기간 할인·선착순 한정 개수, 기간 할인이 끝난 뒤 월 요금 인상액 중앙값·최대값·할인 개월 수, 통신망별(SKT·KT·LG U+) 최저가·중앙값, 유심 무료·테더링·결합·조건 없음 요금제 수.”

    Publisher declares: read-only yes · destructive no · idempotent yes · open-world no

    Takes no inputs.

  • ssal_eventsreads or searches

    “통신사 공식 이벤트 페이지의 사은품(네이버페이·상품권·포인트)이 유지 기간 월 요금+유심비보다 많아 실제로 돈이 남는(+) 알뜰폰 요금제 계산표.”

    Publisher declares: read-only yes · destructive no · idempotent yes · open-world no

    5 inputs
    • brandstring“알뜰폰 통신사 이름 일부 (예: 이야기, 프리티, 헬로)”
    • mnostring“빌려 쓰는 통신망”
    • minNetnumber“최소 남는 돈(원)”
    • excludeReferralboolean“친구추천 링크 가입 조건 제외 여부”
    • limitnumber“1~50, 기본 25”
  • recent_price_changeson 4 other serversreads or searches

    “최근 N일(기본 7, 최대 60) 동안 월 요금이 오르거나 내린 요금제와 바뀐 날짜·이전·이후 요금.”

    Publisher declares: read-only yes · destructive no · idempotent yes · open-world no

    8 inputs
    • daysnumber“1~60, 기본 7”
    • directionstring“up=오른 것만, down=내린 것만”
    • typestring“lifetime=평생 할인·정가(기본) / limited=선착순·기한 한정 가입 / period=N개월 기간 할인 / nodate=종료일 안 적힌 할인 / all=전부”
    • mnostring“빌려 쓰는 통신망”
    • networkstring
    • dataMinnumber“한 달 데이터 최소 GB (매일 제공은 30일치로 계산, 무제한 포함)”
    • brandstring“알뜰폰 통신사 이름 일부 (예: 이야기, 프리티, 헬로)”
    • limitnumber“오름·내림 각각 최대 개수 1~100, 기본 30”
  • plan_price_historyreads or searches

    “요금제 하나의 날짜별 월 요금 기록(매일 공식 홈페이지 확인, 기록 시작일부터).”

    Publisher declares: read-only yes · destructive no · idempotent yes · open-world no

    1 input, 1 required
    • idstringrequired
  • list_carrierson 2 other serversreads or searches

    “알뜰폰 통신사별 요금제 개수·통신망·가장 싼 평생요금제·고객센터 전화(유료/무료)·유심 안내(통신사 원문).”

    Publisher declares: read-only yes · destructive no · idempotent yes · open-world no

    Takes no inputs.

  • price_indexon 3 other serversreads or searches

    “데이터 구간별 평생요금제 월 요금 중앙값·최저값을 달마다 비교한 지수.”

    Publisher declares: read-only yes · destructive no · idempotent yes · open-world no

    Takes no inputs.

Each quoted sentence is the first sentence of the publisher’s own description. The kind of tool and the “changes data” mark are our AI model’s reading of that description, not something we tested: two differently worded runs had to agree, otherwise no label is shown, and nobody has checked them by hand. A tool without the “changes data” mark is described as only reading, searching or calculating, or the two runs did not agree. No tool was called. Read the publisher’s full description before relying on it. “Publisher declares” lists the hints the server itself sends with the tool (MCP annotations: read-only, destructive, idempotent, open-world); they are the publisher's claims, not checked by us. Inputs are the parameters in the tool's own input schema: name, declared type, whether it is required, and the first sentence of its description. Read 2026-10-23.

How well are its tools described?

Features #4 and #5

How clearly this server's own tool descriptions say what a tool does, and how consistent its tool list is. The first part is an AI model's yes/no reading of each description; the second part is counted. We do not turn it into a grade.

Descriptions

AI reading of each description

Says what the tool does
100% of 10 tools
Says what it returns
100% of 10 tools
States limits, defaults or errors
20% of 10 tools
Says when to use it
100% of 10 tools
Items covered per tool
3.2 of 4 on average

Counted from the listing

Parameters with a description
90% of 42
Tools with a description
100% of 10
Typical description length
139 characters

The tool set

Counted from the listing

Tools
10
Size of the list
about 1,774 tokens for an agent to load (characters ÷ 4)
Naming
8 of 10 names use snake_case

AI reading: easy to mix up

No pair found.

The AI items cover 10 of 10 tools: for a tool where two differently worded runs disagreed, that item is left out. They were not checked by hand, and no tool was called. “Easy to mix up” means two tools whose names or descriptions overlap without saying how they differ; the AI found none. We do not rate whether the tool set is complete or whether side effects are spelled out, because our AI reading of those was not reliable enough.

How do I add it to my client?

Config from the registry entry

From the remote endpoint (Streamable HTTP)

We connected to this URL on 2026-10-23 (a read-only session: no tool was called).

Add to CursorAn install link in the format Cursor documents, holding the Cursor config below.

Claude Desktop or claude.ai
Settings → Connectors → Add custom connector, then paste:
https://pyungyo.com/mcp
Cursor · .cursor/mcp.json in a project, or ~/.cursor/mcp.json
{
  "mcpServers": {
    "mvno-plans": {
      "url": "https://pyungyo.com/mcp"
    }
  }
}
VS Code · .vscode/mcp.json
{
  "servers": {
    "mvno-plans": {
      "type": "http",
      "url": "https://pyungyo.com/mcp"
    }
  }
}
VS Code (command line) · Bash or zsh terminal (macOS, Linux)
code --add-mcp '{"name":"mvno-plans","type":"http","url":"https://pyungyo.com/mcp"}'
Claude Code
claude mcp add --transport http mvno-plans https://pyungyo.com/mcp
Try it in the MCP Inspector · runs on your machine, opens in your browser · Node 22.19+
npx @modelcontextprotocol/inspector@2.11.0 --server-url https://pyungyo.com/mcp --transport http
  • The server runs on the operator's infrastructure; it may ask you to sign in when you first connect.
  • The MCP Inspector lists the server's tools, resources and prompts; a tool you call there runs for real.

Built from the server's registry entry with each client's documented format (checked 2026-10-14; the Cursor link and the VS Code command 2026-10-19; the MCP Inspector command 2026-10-21). Values in < > are yours to fill in; this page never contains a key. Where the server needs a setting the entry does not declare, it can still fail to start.

Does the registry listing match what we found?

Feature #6

The registry verifies a package once, when it is published, and does not re-check it. A difference below is about the listing, not a judgement of the publisher.

Registry saysWe foundResultSource · date
Remote endpoint pyungyo.com/mcpSession openedmatchesour test · 2026-10-23
No credential declared as requiredOpened a session without any credentialmatchesour test · 2026-10-23

Choosing

Record checks

Public records · not a safety rating

1 of 2 record checks met · 7 do not apply

  • Not ranked by downloads: a remote server publishes no download figure
  • Not ranked by stars: no public GitHub repository
  • MetRegistry entry is active and says how to run itActive, with a package or a remote address.
  • Not metSource repository link opensThe registry entry gives no repository link.
  • Does not applyRepository is not archivedNo public GitHub repository to read.
  • Does not applyCode pushed to the repository in the 90 days before our checkNo public GitHub repository to read.
  • Does not applyRepository publishes a security policy (SECURITY.md)No public GitHub repository to read.
  • Does not applyPackage names its licence with a standard (SPDX) identifierRemote server: it ships no package.
  • Does not applyThe version the registry lists can be installed and is not withdrawnRemote server: it ships no package.
  • Does not applynpm package carries build provenance (attestation)Remote server: it ships no package.
  • Does not applyNo known critical or high advisory in the package or its dependenciesRemote server: it ships no package.

Read from public records only: the registry entry, npm/PyPI, GitHub and advisory databases, checked 2026-10-22. No tool was called. Only “met” and “not met” are counted, so the total differs between servers; a check that does not apply or that we could not run is listed, never counted against it. It is not a safety rating. How each check works · Leaderboards

Common questions about com.pyungyo/mvno-plans

Answered from the data above

Does com.pyungyo/mvno-plans need an API key or sign-in?

It opened a session without any credential on 2026-10-23. The registry entry declares no required credential; no declaration is not a guarantee.

Has com.pyungyo/mvno-plans been security tested?

Partly. 4 of the 15 checks that apply to it were exercised. We connected and read what the server declares, but did not call its tools: ProtocolProbe calls no server's tools for anything it publishes. This is our choice, not a block by the server. No security verdict is published before verification.

What can com.pyungyo/mvno-plans do?

It lists 10 tools. In our AI model's reading of their descriptions (two runs had to agree, nobody checked it by hand), they include tools that read or search. We did not call any tool, so this describes the text, not the behaviour.

Can com.pyungyo/mvno-plans change or delete data?

None of its 10 tools is described as changing anything (our AI model's reading of the descriptions; nobody checked it by hand). We did not call any tool.

Found this page useful?

Anonymous · no sign-in

A quick, anonymous reaction — no account, no email. One per kind from your browser. The tally updates when the page is next refreshed, and it is only a rough count, never a safety rating or a measured number of people.

Similar servers

Same topic · AI-read

Active servers whose topic is also “data-and-databases” and that have at least one tool of the same kind; most kinds in common first, then most GitHub stars. The topic and the tool kinds are an AI model's reading of the publishers' descriptions, not checked by hand. Similar is not a recommendation.

Compare with another server

Side by side: registry entry, our read-only session, the tools and the 18 classification fields. Same values as each page; no score.

Security testing

What did we test, and what did we leave out?

18 checks · features #1, #2

Not probed (we call no server's tools)

We connected and read what the server declares, but did not call its tools: ProtocolProbe calls no server's tools for anything it publishes. This is our choice, not a block by the server. No security score is given; a check we did not run is never counted as passed.

The 18 checks at a glanceour test · 2026-10-23
  1. Inventory: exercised
  2. Hidden instructions: exercised
  3. Real execution: not run · our policy
  4. Secret leak: not run · nothing to check it against
  5. Internal addresses: not run · our policy
  6. Unconfirmed changes: not run · our policy
  7. Bad input: not run · our policy
  8. Model requests: not run · nothing to check it against
  9. Sensitive questions: not run · nothing to check it against
  10. Folder boundary: not run · our policy
  11. Log leaks: not run · nothing to check it against
  12. Hidden content: exercised
  13. Fake assistant turns: exercised
  14. Token passthrough: not applicable
  15. Token audience: not applicable
  16. Sign-in redirect: not run · our policy
  17. Consent handling: not testable from outside
  18. Sign-in metadata: not applicable

4 exercised11 not run (reason given)3 not applicable

Each check ends in exactly one state: exercised, not run (with the reason), or not applicable (with the reason). 4 of the 15 checks that apply to it were exercised. We do not publish security-check outcomes for named servers.

Exercised · 4
  • 1Inventory
    tool-list
    Reads the declared tools, resources and prompts.exercised
  • 2Hidden instructions
    description-poisoning
    Looks for hidden instructions in tool descriptions.exercised
  • 12Hidden content
    audience-hiding
    Checks resources that hide content from the user.exercised
  • 13Fake assistant turns
    fake-assistant-turn
    Checks prompts that pose as the assistant's own words.exercised
Not run, with the reason · 11
  • 3Real execution
    real-execution
    Calls a tool and checks what really happens.This check calls the server's tools. ProtocolProbe calls no server's tools for anything it publishes; an operator can run this check on their own server with our self-test command.not run · our policy
  • 4Secret leak
    canary-leak
    Plants a fake secret and checks whether it leaks.This check needs at least one successful tool call to have something to check, and no tool was called.not run · nothing to check it against
  • 5Internal addresses
    ssrf
    Checks whether a tool can be steered to internal addresses.This check calls the server's tools. ProtocolProbe calls no server's tools for anything it publishes; an operator can run this check on their own server with our self-test command.not run · our policy
  • 6Unconfirmed changes
    write-without-confirmation
    Checks whether tools that change data act without asking.This check calls the server's tools. ProtocolProbe calls no server's tools for anything it publishes; an operator can run this check on their own server with our self-test command.not run · our policy
  • 7Bad input
    error-handling
    Sends bad input and watches how the server answers.This check calls the server's tools. ProtocolProbe calls no server's tools for anything it publishes; an operator can run this check on their own server with our self-test command.not run · our policy
  • 8Model requests
    sampling
    Checks whether the server asks the client's model to act for it.This check needs at least one successful tool call to have something to check, and no tool was called.not run · nothing to check it against
  • 9Sensitive questions
    elicitation-sensitive-data
    Checks whether the server asks users for sensitive data.This check needs at least one successful tool call to have something to check, and no tool was called.not run · nothing to check it against
  • 10Folder boundary
    root-boundary
    Checks whether the server reaches outside the folders it was given.This check calls the server's tools. ProtocolProbe calls no server's tools for anything it publishes; an operator can run this check on their own server with our self-test command.not run · our policy
  • 11Log leaks
    logging-side-channel
    Checks whether log messages carry data they should not.This check needs at least one successful tool call to have something to check, and no tool was called.not run · nothing to check it against
  • 16Sign-in redirect
    open-redirect
    Checks the sign-in redirect for abuse.Testing the sign-in redirect means sending probes to the operator's sign-in service, which we do not do.not run · our policy
  • 17Consent handling
    confused-deputy
    Checks consent handling when one service acts for another.Depends on the operator's own consent screen, which differs per server and cannot be tested from outside.not testable from outside
Does not apply to this server · 3
  • 14Token passthrough
    token-passthrough
    Checks whether the server forwards a user's token to other services.The server opened a session without sign-in, so there is no token flow to check.not applicable
  • 15Token audience
    token-audience-validation
    Checks whether tokens meant for another service are accepted.The server opened a session without sign-in, so there is no token flow to check.not applicable
  • 18Sign-in metadata
    oauth-url-scheme
    Checks the published sign-in metadata for unsafe URLs.No sign-in (OAuth) metadata is published, so there are no sign-in addresses to check.not applicable

Source: our own test, 2026-10-23, mcp-runtime-engine@0.1.0. Which checks count and why follows our published scoring model.

What happened during the test?

Feature #8

The steps in order, as the test record holds them.

  1. 0 msStarted a read-only session with the server's remote endpoint
  2. 1,746 msConnected after 0 redirects. No credential was sent or needed.
  3. Read the inventory: 10 tools, 5 resources, 3 prompts.
  4. 10,598 msFinished: 4 checks exercised.

Reference

How is it classified?

18 fields

One value per field, each with its source. Fields written by AI models are marked. A field with no value says why.

TopicAI-classified
AI-classified · 2026-10-23
Pricing modelAI-classified
no value
No value: the AI answer was held back because the quoted text did not clearly support it.
Programming language
does not apply
no existing GitHub repository (server declares no repository link, so there is nothing to fetch)
Hosting type
registry · 2026-10-23
MCP capability
prompts, resources, tools
our test · 2026-10-23
Transport
streamable HTTP
registry · 2026-10-23
Required credentials
none declared
registry · no declaration is not a guarantee
Package registry
does not apply
remote-only server: no package is shipped, so there is no package registry
Freshness
0–30 days
registry updatedAt · 2026-10-23
Lifecycle status
registry · 2026-10-23
License class
does not apply
remote-only server: ships no package, so there is nothing to look up in a package registry
Integrity hash
does not apply
remote-only server: ships no package, so there is nothing to look up in a package registry
Signature / provenance
does not apply
remote-only server: ships no package, so there is nothing to look up in a package registry
Dependency advisories
does not apply
ships no package, so there are no dependencies to audit
Popularity
does not apply
remote-only server: ships no package, so there is nothing to look up in a package registry
Publisher signals
not stated
no readable GitHub owner to describe
Maintenance
does not apply
server declares no repository link, so there is nothing to fetch
Environment
the publisher's infrastructure
where it runs, from the hosting type

“Not stated” means the source did not state it; “does not apply” means it does not apply to this kind of server; “our limit” means our own lookup failed. A linked value opens the directory filtered to the same value.

Cite or correct this page

Sources and corrections

Suggested citation

ProtocolProbe. “com.pyungyo/mvno-plans: MCP server record.” Data checked 2026-10-23. https://protocolprobe.com/mcp/servers/com.pyungyo/mvno-plans

Figures are valid for the date shown. Our facts on this page are CC BY 4.0: reuse them with a link and the check date. Quoted text (the publisher’s descriptions, website quotes, tool names) is not ours to license.

As JSON: this record in the API · API documentation.

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