app

read-only

App lookup

What is this app's listing, exactly, in each storefront?

app is the listing lookup: give it a trackId and it returns the app's public App Store metadata per storefront — name, developer, aggregate rating and count, version, price, supported languages, and whether the app is available in that country at all.

Two flags extend it past the raw iTunes lookup. subtitle: true scrapes the App Store web listing for the subtitle, which the iTunes API omits — the subtitle is a third of the searchable word pool, so ASO work needs it. full: true returns the complete lookup record including the description, release notes and OS requirements.

One honest gap, stated rather than papered over: the hidden keyword field is not exposed by any public source, for any app. Tools that claim to show competitors' keyword fields are guessing; here the field is simply absent, and drafts of your own are evaluated locally with coverage.

worked example

Pull HabitKit's US listing, subtitle included.

tools/call → app

{
  "name": "app",
  "arguments": {
    "appId": 6443918070,
    "countries": [
      "US"
    ],
    "subtitle": true
  }
}

app → structuredContent

{
  "appId": 6443918070,
  "storefronts": [
    {
      "country": "US",
      "available": true,
      "app": {
        "trackId": 6443918070,
        "trackName": "Habit Tracker - HabitKit",
        "subtitle": "Streaks & Accountability",
        "developer": "Sebastian Roehl",
        "genre": "Productivity",
        "rating": 4.85477,
        "ratings": 2286,
        "version": "1.15.2",
        "price": "Free",
        "languages": ["EN"],
        "url": "https://apps.apple.com/us/app/habit-tracker-habitkit/id6443918070?uo=4"
      }
    }
  ]
}

real response, captured 2026-07-29 — trimmed only where marked with …

subtitle came from the web listing scrape (subtitle: true) — the iTunes API alone never returns it.
available: false per storefront is a real answer: apps are routinely missing from markets, and every other tool's null ranks make sense once you check availability here.
languages is a quick localization-coverage signal — one localization (["EN"]) means most storefronts search this app through English metadata only.

when to use it

Resolving “what changed?”: version, name and subtitle in one call, diffable across days and storefronts.
Competitive teardowns: walk a competitors result's trackIds and collect every rival's title + subtitle word pool.
Availability checks before interpreting ranks — an app absent from a storefront ranks null for everything there.
Feeding full: true descriptions to an agent for positioning and vocabulary analysis alongside reviews.

description — as served to agents

Metadata for one app (by trackId) per storefront, including whether the app is available in that storefront at all. With full=true returns the complete iTunes lookup record (description, genres, release dates, minimum OS version, ...) instead of the summary. With subtitle=true also scrapes the App Store web listing for the app's subtitle (which the iTunes API omits) — one extra request per storefront; the keyword field is never exposed by any source and is not returned (evaluate metadata drafts, keyword field included, with the coverage tool).

input

appId *

integer

App Store trackId of the app

countries

string[]

2-letter storefront codes, e.g. ["US", "GB", "JP"]. Each storefront is queried separately; at most 25 per call.(default ["US"])

full

boolean

Return the full iTunes lookup record (description included)(default false)

subtitle

boolean

Also fetch the App Store subtitle from the web listing (extra request per storefront)(default false)

output

appId *

integer

storefronts *

object[]

country *

string

available *

boolean

app *

object | null

Summary of the listing (or the full iTunes lookup record, description included, when full=true); null when unavailable

trackId

integer

trackName

string

subtitle

string | null

App Store subtitle from the web listing; only present when subtitle=true (null if none/unreadable)

developer

string | null

genre

string | null

rating

number | null

ratings

integer

version

string | null

price

string | number | null

formatted price string (summary) or numeric price (full record)

languages

array | null

ISO language codes the listing supports

url

string | null

pairs with

coverageturn a listing's title + subtitle into its searchable word pool›competitorsthe source of trackIds worth looking up›auditlisting + word pool + scored candidates in one call›

endpoint https://mcp.openaso.ai/mcp · auth Authorization: Bearer <key> · get a key