Skip to content

Winback: pay-on-success win-back

by winbackhq.com · remote · no sign-in to list tools · v1.0.0 · published by com.winbackhq

Pay-on-success win-back for RevenueCat and Stripe apps. Read-only pricing, fit and estimates.

Changes · 1
CompareRegistry entry

4 tools: 1 change things and 3 only read.

Scanned Oct 21, 2026

No check matched anything in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http winback https://winbackhq.com/mcp/

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

4 tools

Changes things 1Claude Code: ask
  • estimate_win_back_revenueSame formula as https://winbackhq.com/tools/win-back-revenue-calculator/ : people lost per segment times a return rate, times price, over up to 6 months, minus the 15% fee.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    Same formula as https://winbackhq.com/tools/win-back-revenue-calculator/ : people lost per segment times a return rate, times price, over up to 6 months, minus the 15% fee. Default return rates: cancelled 20% (RevenueCat SOSA 2026 monthly reactivation within a year, a reference not a forecast), billing failed 10% (assumption), trial expired 5% (assumption).

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: false
Only reads 3Claude Code: allow
  • get_apple_retention_factsSourced facts on App Store billing retry, grace periods, win-back offers and Retention Messaging, for founders planning a win-back.No findings

    Why it is in this group

    • The name "get_apple_retention_facts" says "get": a word for reading.
    Description, as the server wrote it
    Sourced facts on App Store billing retry, grace periods, win-back offers and Retention Messaging, for founders planning a win-back.

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: false
  • get_winback_overviewWhat Winback does, who it is for, what it needs and what it does not do.No findings

    Why it is in this group

    • The name "get_winback_overview" says "get": a word for reading.
    Description, as the server wrote it
    What Winback does, who it is for, what it needs and what it does not do. Use this when someone asks how to win back churned subscribers of an iOS, Android or Stripe subscription app.

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: false
  • get_winback_pricingWinback pricing terms.No findings

    Why it is in this group

    • The name "get_winback_pricing" says "get": a word for reading.
    Description, as the server wrote it
    Winback pricing terms.

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: false

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Install

Pinned to version 1.0.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http winback https://winbackhq.com/mcp/

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__winback__get_winback_overview",
      "mcp__winback__get_winback_pricing",
      "mcp__winback__get_apple_retention_facts"
    ],
    "ask": [
      "mcp__winback__estimate_win_back_revenue"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as winback. Review it before you use it.