Penguin Statistics

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Crowdsourced Arknights drop rates by stage and item, for the CN, US, JP and KR game servers

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get_dataset_info Read-only

Describes the Penguin Statistics drop data: what its numbers mean (times, quantity, drop rate, sanity per item, window), the game servers with their time zones and how fresh the data of each is, the caveats, the license and how to credit it. Call it when unsure how to read or cite the numbers.

This tool takes no arguments.

Tools (6)

Tool list last changed Oct 25, 2026.

get_dataset_info

read-only

No arguments.

Input schema (JSON)

{
  "type": "object",
  "properties": {},
  "additionalProperties": false
}

get_item_drop_rates

Where to farm an item: ranks every stage of a game server that drops it, with sanity per item, drop rate (items per run), runs (times) and quantity. Use it for any question about where to get an item, its best or most efficient stage, or which of several stages to run for it: one call ranks every stage, so don't look stages up one by one with get_stage_drops (only a named stage left out of the top_n returned). By default the stages open now that still drop it, lowest sanity per item first; stages of fewer than 100 runs (lowSample) rank after the others, gachas and the recruitment (no sanity cost) last. sort_by=drop_rate ranks by rate instead; include_closed=true adds past events and ended drops. item_id takes the item's name in any language; search_items first only when the name may mean several items.

read-only

Argument	Type	Description
lang	string	Language of the names in the result: the language the user writes in, zh, en, ja or ko (en for other languages, and if omitted).
top_n	integer	Most stages to return, 1 to 100. Default 10.
server*	string	Game server the user plays on: CN (mainland China: 国服, 官服, B服), US (global, English: 国际服, 美服), JP (日服) or KR (韩服). Stages, events and drop rates differ by server. Use the server the user named or the conversation makes clear; a user writing Chinese, Japanese or Korean most likely plays CN, JP or KR. If you can't tell, ask the user which server they play on before calling. Name the server in your answer.
item_id*	string	Item ID, from search_items: 30012. A name or alias that only one item has works too: 固源岩, Orirock Cube
sort_by	string	sanity_per_item (default): the least sanity per item first. drop_rate: the most items per run first.
include_closed	boolean	false (default): only the stages open on the server now that still drop the item. true: also the stages of past events and the drops that ended, for history.

Input schema (JSON)

{
  "type": "object",
  "required": [
    "item_id",
    "server"
  ],
  "properties": {
    "lang": {
      "enum": [
        "zh",
        "en",
        "ja",
        "ko"
      ],
      "type": "string",
      "description": "Language of the names in the result: the language the user writes in, zh, en, ja or ko (en for other languages, and if omitted)."
    },
    "top_n": {
      "type": "integer",
      "default": 10,
      "maximum": 100,
      "minimum": 1,
      "description": "Most stages to return, 1 to 100. Default 10."
    },
    "server": {
      "enum": [
        "CN",
        "US",
        "JP",
        "KR"
      ],
      "type": "string",
      "description": "Game server the user plays on: CN (mainland China: 国服, 官服, B服), US (global, English: 国际服, 美服), JP (日服) or KR (韩服). Stages, events and drop rates differ by server. Use the server the user named or the conversation makes clear; a user writing Chinese, Japanese or Korean most likely plays CN, JP or KR. If you can't tell, ask the user which server they play on before calling. Name the server in your answer."
    },
    "item_id": {
      "type": "string",
      "maxLength": 64,
      "minLength": 1,
      "description": "Item ID, from search_items: 30012. A name or alias that only one item has works too: 固源岩, Orirock Cube"
    },
    "sort_by": {
      "enum": [
        "sanity_per_item",
        "drop_rate"
      ],
      "type": "string",
      "default": "sanity_per_item",
      "description": "sanity_per_item (default): the least sanity per item first. drop_rate: the most items per run first."
    },
    "include_closed": {
      "type": "boolean",
      "default": false,
      "description": "false (default): only the stages open on the server now that still drop the item. true: also the stages of past events and the drops that ended, for history."
    }
  },
  "additionalProperties": false
}

get_stage_drops

What one stage drops on a game server: each item with drop rate (items per run), sanity per item, runs (times) and quantity, highest rate first, then the items it no longer drops; with the sanity cost of the stage and whether it is open now. For questions about a given stage. To find where to farm an item, call get_item_drop_rates instead: one call ranks every stage that drops it. Takes the stage ID from search_stages (codes are shared by several stages); a code works too if only one stage on the server has it.

read-only

Argument	Type	Description
lang	string	Language of the names in the result: the language the user writes in, zh, en, ja or ko (en for other languages, and if omitted).
server*	string	Game server the user plays on: CN (mainland China: 国服, 官服, B服), US (global, English: 国际服, 美服), JP (日服) or KR (韩服). Stages, events and drop rates differ by server. Use the server the user named or the conversation makes clear; a user writing Chinese, Japanese or Korean most likely plays CN, JP or KR. If you can't tell, ask the user which server they play on before calling. Name the server in your answer.
stage_id*	string	Stage ID, from search_stages: main_01-07. A code works too if only one stage on the server has it: 1-7

Input schema (JSON)

{
  "type": "object",
  "required": [
    "stage_id",
    "server"
  ],
  "properties": {
    "lang": {
      "enum": [
        "zh",
        "en",
        "ja",
        "ko"
      ],
      "type": "string",
      "description": "Language of the names in the result: the language the user writes in, zh, en, ja or ko (en for other languages, and if omitted)."
    },
    "server": {
      "enum": [
        "CN",
        "US",
        "JP",
        "KR"
      ],
      "type": "string",
      "description": "Game server the user plays on: CN (mainland China: 国服, 官服, B服), US (global, English: 国际服, 美服), JP (日服) or KR (韩服). Stages, events and drop rates differ by server. Use the server the user named or the conversation makes clear; a user writing Chinese, Japanese or Korean most likely plays CN, JP or KR. If you can't tell, ask the user which server they play on before calling. Name the server in your answer."
    },
    "stage_id": {
      "type": "string",
      "maxLength": 64,
      "minLength": 1,
      "description": "Stage ID, from search_stages: main_01-07. A code works too if only one stage on the server has it: 1-7"
    }
  },
  "additionalProperties": false
}

list_events

Lists the events (limited-time activities) of a game server: status now (open, upcoming or closed), open and close times, whether a rerun. By default the open and upcoming events with their stage IDs (for get_stage_drops), or the latest 3 if there are none; open_only=false lists every event, latest first, with stage counts only. The main story and the permanent side stories are not events.

read-only

Argument	Type	Description
lang	string	Language of the names in the result: the language the user writes in, zh, en, ja or ko (en for other languages, and if omitted).
limit	integer	Most events to return, 1 to 50. Default 20.
server*	string	Game server the user plays on: CN (mainland China: 国服, 官服, B服), US (global, English: 国际服, 美服), JP (日服) or KR (韩服). Stages, events and drop rates differ by server. Use the server the user named or the conversation makes clear; a user writing Chinese, Japanese or Korean most likely plays CN, JP or KR. If you can't tell, ask the user which server they play on before calling. Name the server in your answer.
open_only	boolean	true (default): the events open or upcoming on the server, with their stages; if there are none, the latest 3. false: every event of the server, latest first, without their stages.

Input schema (JSON)

{
  "type": "object",
  "required": [
    "server"
  ],
  "properties": {
    "lang": {
      "enum": [
        "zh",
        "en",
        "ja",
        "ko"
      ],
      "type": "string",
      "description": "Language of the names in the result: the language the user writes in, zh, en, ja or ko (en for other languages, and if omitted)."
    },
    "limit": {
      "type": "integer",
      "default": 20,
      "maximum": 50,
      "minimum": 1,
      "description": "Most events to return, 1 to 50. Default 20."
    },
    "server": {
      "enum": [
        "CN",
        "US",
        "JP",
        "KR"
      ],
      "type": "string",
      "description": "Game server the user plays on: CN (mainland China: 国服, 官服, B服), US (global, English: 国际服, 美服), JP (日服) or KR (韩服). Stages, events and drop rates differ by server. Use the server the user named or the conversation makes clear; a user writing Chinese, Japanese or Korean most likely plays CN, JP or KR. If you can't tell, ask the user which server they play on before calling. Name the server in your answer."
    },
    "open_only": {
      "type": "boolean",
      "default": true,
      "description": "true (default): the events open or upcoming on the server, with their stages; if there are none, the latest 3. false: every event of the server, latest first, without their stages."
    }
  },
  "additionalProperties": false
}

search_items

Finds items (materials, battle records, chips, furniture, event items) by name in any language (zh, en, ja, ko), by alias or nickname (土块, 狗粮), by pinyin (guyuanyan) or by item ID, and returns their item IDs (get_item_drop_rates takes a name too; search first when unsure which item is meant) and names in every language. Best matches first: exact before prefix before substring, names before aliases. Several items can share an alias (石头 is each tier of Orirock): ambiguous is then true; ask the user which one is meant or decide by context. Items of other types (workshop-crafted materials such as D32 Steel, recruitment tags) are returned only when no listed item matches, with a note saying what they are.

read-only

Argument	Type	Description
lang	string	Language of the names in the result: the language the user writes in, zh, en, ja or ko (en for other languages, and if omitted).
limit	integer	Most items to return, 1 to 25. Default 10.
query*	string	Name, alias, pinyin or ID of the item, in any language: 固源岩, Orirock Cube, 石头, guyuanyan or 30012

Input schema (JSON)

{
  "type": "object",
  "required": [
    "query"
  ],
  "properties": {
    "lang": {
      "enum": [
        "zh",
        "en",
        "ja",
        "ko"
      ],
      "type": "string",
      "description": "Language of the names in the result: the language the user writes in, zh, en, ja or ko (en for other languages, and if omitted)."
    },
    "limit": {
      "type": "integer",
      "default": 10,
      "maximum": 25,
      "minimum": 1,
      "description": "Most items to return, 1 to 25. Default 10."
    },
    "query": {
      "type": "string",
      "maxLength": 64,
      "minLength": 1,
      "description": "Name, alias, pinyin or ID of the item, in any language: 固源岩, Orirock Cube, 石头, guyuanyan or 30012"
    }
  },
  "additionalProperties": false
}

search_stages

Finds stages by code (1-7, S2-12, YW-4; full-width characters work too), by stage ID (main_01-07), or by the name or ID of their zone (第十章, Under Tides), and returns their stage IDs (for get_stage_drops; to find the stages that drop an item, use get_item_drop_rates) with their zone, sanity cost and whether they are open on the server now. Codes are not unique: the standard and tough versions of a stage of the main story share them, as do an event, its rerun and the stages it left open for good. Best matches first (the code before the zone, exact before prefix before substring), then the stages open now, standard before tough, original before permanent before rerun. ambiguous is true when several stages share the best-matching code (not for the stages of a zone found by its name): ask the user which one is meant or decide by context.

read-only

Argument	Type	Description
lang	string	Language of the names in the result: the language the user writes in, zh, en, ja or ko (en for other languages, and if omitted).
limit	integer	Most stages to return, 1 to 25. Default 10.
query*	string	Code or ID of the stage, or the name or ID of its zone, in any language: 1-7, S2-12, main_01-07, 第十章 or Under Tides
server	string	Game server the user plays on: CN (China), US (global, English), JP (Japan) or KR (Korea). Default CN. The stages open there now rank first.

Input schema (JSON)

{
  "type": "object",
  "required": [
    "query"
  ],
  "properties": {
    "lang": {
      "enum": [
        "zh",
        "en",
        "ja",
        "ko"
      ],
      "type": "string",
      "description": "Language of the names in the result: the language the user writes in, zh, en, ja or ko (en for other languages, and if omitted)."
    },
    "limit": {
      "type": "integer",
      "default": 10,
      "maximum": 25,
      "minimum": 1,
      "description": "Most stages to return, 1 to 25. Default 10."
    },
    "query": {
      "type": "string",
      "maxLength": 64,
      "minLength": 1,
      "description": "Code or ID of the stage, or the name or ID of its zone, in any language: 1-7, S2-12, main_01-07, 第十章 or Under Tides"
    },
    "server": {
      "enum": [
        "CN",
        "US",
        "JP",
        "KR"
      ],
      "type": "string",
      "default": "CN",
      "description": "Game server the user plays on: CN (China), US (global, English), JP (Japan) or KR (Korea). Default CN. The stages open there now rank first."
    }
  },
  "additionalProperties": false
}