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Connect Refund Proration Calculator to ChatGPT and Claude

Set it up once and it works in ChatGPT, Claude, Cursor, and any other client you love. It all runs safely in the background, so you can relax and focus on what really matters. Get precise partial refund math without manual calculations.

Ask AI about this Connector

Developed, maintained, and hosted by Vinkius.

MCP VERIFIED · PRODUCTION READY · VINKIUS GUARANTEED

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Works with modern AI clients that support MCP, including ChatGPT, Claude, Cursor, and more.

ChatGPTClaudeCursorPerplexityGeminiMicrosoft CopilotRaycastMeta AI

Your AI does the work. We keep it safe and sound.

No other AI tool gives you this. Your workflow runs in the client you already love, your account stays protected, and you decide what the agent can and cannot do. It is the whole reason to make the switch.

Each Connector lives inside our infrastructure, the same place where your workflow runs. The three things below are already part of it, working quietly in the background so you never have to think about them. Nothing to add, nothing to set up, nothing to worry about.

A futuristic MCP client docking bay
V8 Isolate01

Each Connector runs inside its own sealed environment.

Each Connector runs inside its own sealed V8 runtime — no access to your files, your system, or other servers. A Connector never sees past its own request.

Kill Switch02

One switch stops every agent. Instantly.

One action deactivates every Connector, revokes every token, and ends every session at once. AI Governance keeps the record.

FinOps per User03

Spending limits that pause instead of surprise.

Every user keeps their own connections and credentials, isolated from everyone else. Anything that would cross your spending limit is held for your approval, not billed.

Three controls, built into the layer your AI connects through.

Curated set · 4 capabilities

We ship only the actions that matter.

Capability set01 / 01

01-04

4 capabilities in this set.

Part of 4 available through Refund Proration Calculator.

  1. 01

    Bulk refund summary

    This capability aggregates multiple refund scenarios into one view. It provides a total summary of potential refund amounts across various items.

  2. 02

    Get proration refund

    This capability calculates the specific refund amount for a set of usage parameters. It uses the ratio of unused units to determine the exact payout.

  3. 03

    Get unit value

    This capability finds the cost of a single unit. It's useful for breaking down large purchases into individual item prices.

  4. 04

    Validate proration eligibility

    This capability checks if a transaction is actually eligible for a proration-based refund. It prevents your agent from attempting to refund invalid requests.

Real work

What teams actually run

01

Subscription Cancellations

Calculate exactly how much to credit a user when they cancel a service halfway through a billing cycle.

02

Inventory Returns

Determine the refund value for customers returning a portion of a bulk order.

03

Service Credit Adjustments

Use the agent to figure out the value of unused service units for client billing.

04

Audit Preparation

Run bulk summaries to see the total impact of pending refund requests.

One connector, every AI

Refund Proration Calculator works with the most popular AI clients.

These are the most popular clients, each with a step-by-step guide: one link, set up once, with governance and visibility built in. And because everything runs on the MCP standard, the same connection also works in any other compatible client — nothing to rebuild.

ClaudeClaudeChatGPTChatGPTGeminiGeminiPerplexityPerplexityGrokGrokMicrosoft CopilotMicrosoft CopilotCursorCursorVS CodeVS CodeWindsurfWindsurfJetBrainsJetBrainsClineClineLangChainLangChainVercel AI SDKVercel AI SDKLovableLovableZ.aiZ.aiRaycastRaycastQwen CodeQwen CodeKimi CodeKimi CodeLe ChatLe Chat

Building your own app? The connector is yours to use.

You don't need a client to put Refund Proration Calculator to work: the same hosted connection plugs into your own applications and agent code, with the same governance on every request. Build with it, chat with it — one connection for both.

Observed, not estimated

927ms average. Fast in production.

Refund Proration Calculator is checked daily against the live service.

Daily averagePeak 1158ms
Oct 9Today
Fastest day
816ms
Slowest day
1158ms
14-day trend
Slowing+10%

Connect your client

One URL. Every client.

Activate the Connector, copy your link, and paste it into the client you already use. 4 capabilities arrive ready to run.

Preview access · not provider authentication

The vk_preview_* token belongs to Vinkius preview infrastructure. It lets Claude discover and display the capabilities of Refund Proration Calculator, so you can see the experience inside your AI.

It does not authenticate your account with Refund Proration Calculator. Actions requiring credentials or live account data may not run until you activate the Connector and authorize the service.

Refund Proration Calculator Connector

You're all set. Choose your MCP client and follow the setup instructions.

Connector linkhttps://edge.vinkius.com/vk_preview_guatjEB0j0tSB2fH9IbV9aUFcDufWsDIGk0fgmBx/mcp

Claude Desktop

Follow the steps below to connect in seconds.

  1. 1In Claude Desktop, open Settings → Connectors.
  2. 2Click “Add custom connector” and paste the connector link above as the remote MCP server URL.
  3. 3Click Add and start a new chat — Refund Proration Calculator capabilities are ready to use.
Configuration · claude_desktop_config.jsonCopy
{
  "mcpServers": {
    "refund-proration-calculator-mcp": {
      "url": "https://edge.vinkius.com/vk_preview_guatjEB0j0tSB2fH9IbV9aUFcDufWsDIGk0fgmBx/mcp"
    }
  }
}
  • Claude
  • ChatGPT
  • Cursor
  • VS Code
  • Windsurf
  • Claude Code
  • JetBrains
  • Cline

Step-by-step instructions for each client are in the guide. How to connect

Guided setup for Claude? Set up Refund Proration Calculator in Claude and other AIs

See all the AI clients this connector works with ↑

Who it's for

Built for the work Refund Proration Calculator owners hand off.

This MCP is for professionals managing subscriptions, service credits, or inventory returns.

  • 01

    Accountants

    They hand off complex proration math to the agent to ensure ledger accuracy.

  • 02

    Customer Support Leads

    They use the agent to quickly determine how much to refund a customer during a chat.

  • 03

    Billing Managers

    They use the agent to run bulk summaries of refund liabilities.

FAQ

Questions Refund Proration Calculator owners ask.

  • 01

    How does this MCP calculate a refund?

    It calculates the amount by analyzing the ratio of unused units to the total units originally purchased.

  • 02

    Can I use this with Claude or Cursor?

    Yes, you can connect this MCP to any MCP-compatible client like Claude, Cursor, or Windsurf.

  • 03

    Does it handle bulk requests?

    Yes, the bulk_refund_summary capability allows your agent to aggregate refund potential across multiple items.

  • 04

    Can the agent check if a refund is allowed?

    Yes, the validate_proration_eligibility capability lets your agent verify if a transaction qualifies for proration.

  • 05

    Do I need to host this myself?

    No, Vinkius hosts and manages the MCP for you, so it is ready to use immediately after connection.

  • 06

    How is the refund amount calculated?

    The refund is calculated by dividing the unused units by the total units purchased and multiplying that fraction by the original price. You can use get_proration_refund to perform this calculation.

  • 07

    Can I check if a customer is eligible for a refund first?

    Yes, use the validate_proration_eligibility capability to verify if there are remaining units available for a proration-based refund.

  • 08

    Can I process multiple refunds at once?

    Yes, the bulk_refund_summary capability allows you to provide a list of different scenarios to get an aggregated total refund amount.

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