Atlas entry

`pyungyo.com`

18 capabilities over MCP. The inventory is incomplete. First atlas observation.

Observed 3 Nov 2026, 07:01 UTC · passive: no tools called, no credentials sent · sha256:dae0ac…9673

Capability facts

As observed from outside, at the time below

Observed: 3 Nov 2026, 07:01 UTC
Signed: 3 Nov 2026, 21:05 UTC

Protocols: MCP
Tools: 10
Declared sign-in: None declared

Effects counted AI readings, beta

Moves money: 0
Deletes or cancels records: 0
Sends messages to people: 0
Changes permissions: 0
Runs code: 0
Asks a person: 0

10 tools examined; 9 counted above a measured threshold.

Declared vs read disagreements

Declared read-only, read as writing: 0
Declared destructive, read as not writing: 0
Declared non-destructive, read as deleting: 0
Declared closed-world, read as reaching out: 0

Change since previous: First observation
Label status: Current

Surfaces

5 protocols checked

ARD	invalid	1 retrieved artifact
A2A	invalid	0 skills
MCP	Valid	2025-11-25 · 10 tools · 5 resources · 3 prompts
OpenAPI	Not detected	0 operations
WebMCP	Not detected	0 declarative form tools · experimental

Exact states and meaning

ARD
failed
Exact state: invalid · 1 retrieved artifact
InterfaceDelta retained the machine state “invalid” without assigning an additional meaning.
Not observed / not fetched
A2A
failed
Exact state: invalid · 0 skills
InterfaceDelta retained the machine state “invalid” without assigning an additional meaning.
Not observed / not fetched
MCP
observed
Exact state: valid · Revision 2025-11-25 · 10 tools · 5 resources · 3 prompts
A usable protocol document was retrieved and validated.
Directly observed
OpenAPI
absent
Exact state: not detected · 0 operations
No endpoint was established from the evidence and scope that InterfaceDelta inspected.
Not detected does not prove that no endpoint exists.
Not observed / not fetched
WebMCP
absent
Exact state: not detected · 0 declarative form tools · experimental
No named declarative WebMCP form tools were observed in the origin root HTML.
Script-registered tools and other pages are not observed, so this does not mean the site has no WebMCP tools.
Not observed / not fetched

Capabilities

18 · inventory incomplete

Summary of the AI readings · beta

The service lists 10 capabilities, and 9 have AI readings.

9 capabilities are read as read-only, including ssal_events, cheapest_by_data and recent_price_changes.

Rows named: ssal_events · cheapest_by_data · recent_price_changes

Written by code from the AI readings on this page: it groups them and says nothing they do not.

The atlas shows each capability by its plain identifier, inputs and declared sign-in. Publisher descriptions, paths, links and source evidence are not published here.

A2A skills 0+ observed

Inventory incomplete. The displayed count is a lower bound; missing items do not prove removal.

None recorded in this Passport.

MCP tools 10

cheapest_by_data
inputs mno, network, qosMin, usimFree and 1 more
AI Reads only 0.85
fetch
inputs id (required)
AI Reads only 0.90
list_carriers
AI Reads only 0.90
market_stats
AI Reads only 0.87
plan_price_history
inputs id (required)
AI Reads only 0.89
price_index
recent_price_changes
inputs brand, dataMin, days, direction and 4 more
AI Reads only 0.86
search
inputs query (required)
AI Reads only 0.90
search_plans
inputs brand, bundle, comparePeriod, dailyData and 17 more
AI Reads only 0.90
ssal_events
inputs brand, excludeReferral, limit, minNet and 1 more
AI Reads only 0.90

MCP resources 5

name not shown
name not shown
name not shown
name not shown
name not shown

MCP prompts 3

check_period_plan_trap
find_best_plan
monthly_market_briefing

OpenAPI operations 0+ observed

Inventory incomplete. OpenAPI operations could not be fully inventoried: the ARD document was not valid, so declarations made there were not read.

None recorded in this Passport.

Declared and observed

10 tools declare hints; the AI readings agree with all 9 that have a reading.

A disagreement is not a finding about the service: either side can be wrong. How we compare declarations and readings.

Atlas history

1 observation

3 Nov 2026, 07:01 UTC18 capabilities · MCP 2025-11-25 · MCP endpoint validFirst observation
Fingerprint and versions
Fingerprint
dae0ac1011dbd4e538c030567192f52a30fd5f7608ff12fe1978255445c59673
Passport schema
0.5.0, passport-semantic-v4
Consistency
MCP_PROMPTS_ADVERTISEMENT_LIST: match · MCP_RESOURCES_ADVERTISEMENT_LIST: match · MCP_TOOLS_ADVERTISEMENT_LIST: match · OPENAPI_MCP_EXPLICIT_MAPPING: not applicable

Each class compares an observation with the previous atlas observation. Runs of unchanged observations are grouped. Struck values are what the previous observation recorded; inserted values are what this one recorded.

About this entry

com.pyungyo/mvno-plans
Listed
Official MCP Registry · first listed 3 Nov 2026 · last listed 3 Nov 2026

Passive observations of a public interface listed in the Official MCP Registry. An observation does not verify security, ownership or compliance, and InterfaceDelta assigns no scores or rankings. Methodology · Report an inaccuracy · Ask for removal

Identity and snapshot

Target key: sha256:de944ddfc22ce8671437e3baf89c620829e7d3369ba056815e1632bee16645d7
Locator SHA-256: 170cb21bae76798b92f385d5cf251bfd0b77fba8ac16ed7d85725af831c8ae5d
Snapshot generated: 4 Nov 2026, 00:59 UTC

The entry is one exact observed target, not a real-world service identity, and implies no ownership. Endpoint paths are not published; the locator hash lets an operator confirm their own URL.