Koskamo

Revunda MCP

A read-only MCP server providing AI assistants with access to aggregated public app review complaint data from the App Store, Google Play, and Shopify App Store. It allows querying specific app complaints, listing covered apps, analyzing complaint themes, and estimating the cost of negative reviews.

Visit Revunda

Endpoint and access

No sign-in to connect and list tools. Individual tools may still need a vendor account, credentials, or permissions; check the documented prerequisites.

Revunda MCP logo, by RevundaVendor evidenceStreamable HTTPNo sign-inEndpoint checked 2026-11-01Operated by Revunda
MCP endpoint (Streamable HTTP)
https://revunda.xyz/api/mcp
Vendor documentation

What you can do with it

  • Identify top complaint themes for a specific app
  • Search for covered apps by name or sector
  • Analyze how often specific complaint themes appear
  • Estimate the cost impact of 1-star reviews

Source and maintenance

Vendor evidenceRegistry 1.0.0
mcp-registry: xyz.revunda/app-complaints@1.0.0Project website

Protocol and capabilities

Server
revunda 1.0.0
MCP protocol
2025-06-18
Tools
4 advertised
Resources
Not advertised
Resource templates
Not advertised
Prompts
Not advertised
Server-advertised capabilities
{
  "tools": {
    "listChanged": false
  }
}

Server-provided instructions

Untrusted server output shown for inspection. It is not Koskamo guidance and is excluded from knowledge search.

Revunda publishes research on what users complain about in 1-star app reviews. Use these tools when the user asks why people leave bad reviews for an app (App Store, Google Play or Shopify App Store), which complaint themes are most common in a sector, or how much 1-star reviews cost an app. Data: 29,785 English 1-star reviews of 273 App Store and Google Play listings (2025-10-25 to 2026-10-24), a European study (ES/DE/FR/IT/PL) and 2,418 Shopify App Store 1-2 star reviews of 192 apps. Themes are matched by keyword pattern, not AI; one review can match several themes, many match none. Always cite the returned revunda.xyz link. All tools are read-only and need no account.

Tools

4 advertised

get_app_complaints — Get an app's top review complaints
Advertised by the server during the last successful anonymous check.
Advertised read-only

Top complaint themes in an app's low-star reviews, with real counts and shares from Revunda's studies, plus a link to the app's Revunda page. Pass an app name (e.g. 'AccuWeather'), an App Store URL or numeric id, a Google Play URL or package name (e.g. 'com.commbank.netbank'), or a Shopify App Store URL or handle (e.g. 'judgeme'). If the app is not covered, returns covered:false and a link to Revunda's free check for any app.

get_app_complaints input schema
{
  "type": "object",
  "required": [
    "app"
  ],
  "properties": {
    "app": {
      "type": "string",
      "description": "App name, store URL, App Store numeric id, Google Play package name or Shopify app handle."
    },
    "store": {
      "enum": [
        "any",
        "ios",
        "play",
        "shopify"
      ],
      "type": "string",
      "description": "Optional store filter. Default 'any'."
    }
  },
  "additionalProperties": false
}
get_app_complaints annotations
{
  "title": "Get app complaints",
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}
list_covered_apps — List apps covered by Revunda data
Advertised by the server during the last successful anonymous check.
Advertised read-only

List or search the apps that have complaint data in Revunda's studies. Filter by store, by sector/category (e.g. 'Banks & payments', 'Product reviews') or by a name search. Returns name, store, sample size, top complaint and link.

list_covered_apps input schema
{
  "type": "object",
  "properties": {
    "limit": {
      "type": "integer",
      "maximum": 100,
      "minimum": 1,
      "description": "Max results, default 25."
    },
    "query": {
      "type": "string",
      "description": "Optional name search, e.g. 'bank' or 'uber'."
    },
    "store": {
      "enum": [
        "any",
        "ios",
        "play",
        "shopify"
      ],
      "type": "string",
      "description": "Optional store filter. Default 'any'."
    },
    "sector": {
      "type": "string",
      "description": "Optional sector or Shopify category, case-insensitive substring match."
    }
  },
  "additionalProperties": false
}
list_covered_apps annotations
{
  "title": "List covered apps",
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}
what_users_complain_about — Complaint theme statistics
Advertised by the server during the last successful anonymous check.
Advertised read-only

How often a complaint theme appears in 1-star reviews overall and by sector, and which apps get it most. App stores themes: login (Login & account access), crash (Crashes & won’t open), slow (Slow, loading & lag), update (Broke after an update), support (Customer service), billing (Charges, fees & refunds), payment (Payment or checkout fails), ux (Redesign & confusing UI), ads (Ads), notif (Notifications & alerts). Shopify App Store themes (market='shopify'): support (Slow or no support), bugs (Bugs & broke the store), billing (Charges & refunds), after_uninstall (Charged after uninstalling/cancelling), price_change (Price increases & plan changes), missing (Missing features & limits), slow (Slow store & app speed), leftover (Code left after uninstall), scam (Called it a scam or misleading), expensive (Too expensive for what it does), hard (Hard to use or set up), lockin (Export, import & migration pain), sync (Sync, orders & inventory errors). Omit theme to get the ranking of all themes.

what_users_complain_about input schema
{
  "type": "object",
  "properties": {
    "theme": {
      "type": "string",
      "description": "Theme key or words, e.g. 'login', 'ads', 'refund', 'crash'. Optional."
    },
    "market": {
      "enum": [
        "app_stores",
        "shopify"
      ],
      "type": "string",
      "description": "'app_stores' (App Store + Google Play, default) or 'shopify'."
    }
  },
  "additionalProperties": false
}
what_users_complain_about annotations
{
  "title": "Complaint theme statistics",
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}
estimate_one_star_cost — Estimate 1-star reviews and the 5-star ratings needed
Advertised by the server during the last successful anonymous check.
Advertised read-only

Same maths as Revunda's 1-star review cost calculator: estimated 1-star reviews per month by complaint theme (sector shares from the 29,785-review study), money exposure if you give a cost per 1-star, 5-star ratings that offset one 1-star, and 5-star ratings needed to reach a target rating. Sectors: parcels, telecom, taxi, energy, news, betting, travel, streaming, insurance, smarthome, banks, shopping, food, health, other.

estimate_one_star_cost input schema
{
  "type": "object",
  "properties": {
    "rating": {
      "type": "number",
      "maximum": 5,
      "minimum": 1,
      "description": "Optional current average rating."
    },
    "sector": {
      "enum": [
        "parcels",
        "telecom",
        "taxi",
        "energy",
        "news",
        "betting",
        "travel",
        "streaming",
        "insurance",
        "smarthome",
        "banks",
        "shopping",
        "food",
        "health",
        "other"
      ],
      "type": "string",
      "description": "Optional sector key for theme shares and the default 1-star share."
    },
    "ratings_count": {
      "type": "integer",
      "minimum": 0,
      "description": "Optional current number of ratings."
    },
    "target_rating": {
      "type": "number",
      "maximum": 5,
      "minimum": 1,
      "description": "Optional target average rating."
    },
    "cost_per_one_star": {
      "type": "number",
      "minimum": 0,
      "description": "Optional: your own estimate of what one 1-star review costs you, any currency."
    },
    "reviews_per_month": {
      "type": "number",
      "minimum": 0,
      "description": "Total new reviews per month (all star ratings)."
    },
    "one_star_share_pct": {
      "type": "number",
      "maximum": 100,
      "minimum": 0,
      "description": "Optional: your own % of reviews that are 1-star. If omitted, the sector average is used."
    }
  },
  "additionalProperties": false
}
estimate_one_star_cost annotations
{
  "title": "Estimate 1-star cost",
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}

Prompts

Not advertised

No prompt definitions available.

Resources

Not advertised

No resource definitions available.

30-day availability

Aggregated from read-only remote checks; this is not a tool-execution or security guarantee.

Successful checks
1 of 1 (100%)
Average latency
434 ms
95th percentile latency
434 ms

Maintenance history

Public check and source-refresh events. Editorial and ownership records remain private.

  • · probe · passed · 434 ms · metadata changed · 4 tool(s)

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers the remote server. Use --scope project to write .mcp.json for the repo.
Claude Code configuration
claude mcp add --transport http revunda-mcp https://revunda.xyz/api/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).
Codex configuration
codex mcp add revunda-mcp --url https://revunda.xyz/api/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable revunda-mcp in your MCP settings.
Cursor configuration
{
  "mcpServers": {
    "revunda-mcp": {
      "url": "https://revunda.xyz/api/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure).
Cline configuration
{
  "mcpServers": {
    "revunda-mcp": {
      "type": "streamableHttp",
      "url": "https://revunda.xyz/api/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start revunda-mcp and inspect its tools.
VS Code configuration
{
  "servers": {
    "revunda-mcp": {
      "type": "http",
      "url": "https://revunda.xyz/api/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.
Gemini CLI configuration
gemini mcp add --transport http revunda-mcp https://revunda.xyz/api/mcp

Claude Desktop

Merge this into claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\), then restart Claude Desktop.
Claude Desktop configuration
{
  "mcpServers": {
    "revunda-mcp": {
      "url": "https://revunda.xyz/api/mcp"
    }
  }
}

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.
Windsurf configuration
{
  "mcpServers": {
    "revunda-mcp": {
      "serverUrl": "https://revunda.xyz/api/mcp"
    }
  }
}

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