rankcusp
App Store keyword ranks, the 11-30 cusp band, metadata audits and rival positions.
Connect it
Settings → Connectors → Add custom connector
URL: https://rankcusp.com/api/mcpSettings → Apps & Connectors → Advanced → Developer mode
Create connector with URL: https://rankcusp.com/api/mcp{
"mcpServers": {
"aso": {
"url": "https://rankcusp.com/api/mcp",
"headers": {
"Authorization": "<YOUR_AUTHORIZATION>"
}
}
}
}claude mcp add --transport http aso https://rankcusp.com/api/mcp --header "Authorization: <value>"{
"servers": {
"aso": {
"type": "http",
"url": "https://rankcusp.com/api/mcp",
"headers": {
"Authorization": "<YOUR_AUTHORIZATION>"
}
}
}
}9 tools, verified live
list_appsread-onlyLists the apps and rivals tracked on the account. The appId and storefront codes the other tools want come from here.
list_keywordsread-onlyLists an app's keywords in one storefront, with rank, popularity and difficulty.
get_keywordread-onlyOne keyword: its rank, its scores, its first page and the verdict - should it be targeted, and why. Every unmeasured value comes back null, never zero.
audit_metadataread-onlyAudits a draft title, subtitle and 100-character keyword field against Apple's rules and against each other. Returns what is wasted, what Apple will actually index, and the field rewritten without the waste. Nothing is submitted anywhere - this only reads the text you pass in.
country_prioritiesread-onlyRanks the storefronts an app is tracked in by how much is winnable there: how many keywords sit in the cusp band, how many already reach the top ten, and whether the rivals' ratings leave an opening. Answers which market to work on first.
ranking_keywordsread-onlyWhich keywords an app is already ranking for, from the pooled record of every search this product has run. Works on any App Store id, not only the ones on this account - point it at a rival to read theirs. Apple publishes no endpoint for this; the answer is only as wide as what has been observed, so an app nobody has swept near returns little.
keyword_competitorsread-onlyWho ranks for a phrase, deeper than the ten the first page carries. Use it to find the rivals a first-page reading misses - an app at 40 for a phrase you sit at 60 for is the one to study.
add_keywordsAdds keywords to an app's tracked set in one storefront. Takes a list or a comma-separated paste. They arrive unscored - scoring costs requests to Apple and happens on the collector's schedule - so do not read a null popularity here as a zero.
cusp_actionsread-onlyThe keywords in the 11-30 band, ordered by popularity. The work list a metadata edit pays off on most.
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