Can I block a fraudulent user through the agent?

Yes! Use the `apply_user_decision` tool with the user's ID and the appropriate decision ID (like `block_user`). The action will be applied in Sift immediately.

How do I check the risk score for a specific customer?

Use the `get_user_fraud_score` tool with the customer's unique ID. Your agent will fetch the latest risk score generated by Sift's machine learning models.

Where do I find my Sift API Key and Account ID?

Log in to your Sift Dashboard and navigate to **Settings -> API Keys**. You will find your REST API Key and Account ID there.

Sift (Chargeback) MCP Server for Claude Desktop 8 tools — connect in under 2 minutes

Name: Sift (Chargeback)
Availability: InStock
Author: Vinkius

modelcontextprotocol.io/quickstart/user

Built by Vinkius GDPR 8 Tools IDE

Claude Desktop is Anthropic's native application for interacting with Claude AI models on macOS and Windows. It was the first consumer application to ship with built-in MCP support, making it the reference implementation for the Model Context Protocol standard.

Get MCP Server for AI Agents

ASK AI ABOUT THIS MCP SERVER

Open in ChatGPT Open in Claude Open in Perplexity

Vinkius supports streamable HTTP and SSE.

RecommendedModern Approach — Zero Configuration

Vinkius Desktop App

The modern way to manage MCP Servers — no config files, no terminal commands. Install Sift (Chargeback) and 2,500+ MCP Servers from a single visual interface.

Download Free Open SourceNo signup required

Classic Setup·json

{
  "mcpServers": {
    "sift-chargeback": {
      // Your Vinkius token — get it at cloud.vinkius.com
      "url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    }
  }
}

Fully ManagedVinkius Servers

60%Token savings

High SecurityEnterprise-grade

IAMAccess control

EU AI ActCompliant

DLPData protection

V8 IsolateSandboxed

Ed25519Audit chain

<40msKill switch

Stream every event to Splunk, Datadog, or your own webhook in real-time

* Every MCP server runs on Vinkius-managed infrastructure inside AWS - a purpose-built runtime with per-request V8 isolates, Ed25519 signed audit chains, and sub-40ms cold starts optimized for native MCP execution. See our infrastructure

About Sift (Chargeback) MCP Server

Connect your Sift account to any AI agent and take full control of your fraud protection and chargeback management through natural conversation. Streamline risk analysis and dispute resolution.

Claude Desktop is the definitive way to connect Sift (Chargeback) to your AI workflow. Add the Vinkius Edge URL to your config, restart the app, and Claude immediately exposes all 8 tools in the chat interface — ask a question, Claude calls the right tool, and you see the answer. Zero code, zero context switching.

What you can do

Chargeback Reporting — Notify Sift of new chargeback events, including states and reasons natively
Fraud Intelligence — Retrieve real-time fraud scores for users to evaluate transaction risk flawlessly
Decision Automation — Apply manual or automated decisions (e.g., block user, accept order) securely
Dispute Oversight — List and audit the history of decisions and labels applied to any user flawlessly
Workflow Visibility — Access and monitor your configured fraud prevention workflows in real-time
Behavioral Tracking — Log custom events like logins or transactions to refine Sift's machine learning directly within your workspace

The Sift (Chargeback) MCP Server exposes 8 tools through the Vinkius. Connect it to Claude Desktop in under two minutes — no API keys to rotate, no infrastructure to provision, no vendor lock-in. Your configuration, your data, your control.

How to Connect Sift (Chargeback) to Claude Desktop via MCP

Follow these steps to integrate the Sift (Chargeback) MCP Server with Claude Desktop.

Open Claude Desktop Settings

Go to Settings → Developer → Edit Config to open claude_desktop_config.json

Add the MCP Server

Paste the configuration above into the mcpServers section

Restart Claude Desktop

Close and reopen Claude Desktop to load the new server

Start using Sift (Chargeback)

Look for the 🔌 icon in the chat — your 8 tools are now available

Why Use Claude Desktop with the Sift (Chargeback) MCP Server

Claude Desktop by Anthropic provides unique advantages when paired with Sift (Chargeback) through the Model Context Protocol.

Claude Desktop is the reference MCP client — it was designed alongside the protocol itself, ensuring the most complete and stable MCP implementation available

Zero-code configuration: add a server URL to a JSON file and Claude instantly discovers and exposes all available tools in the chat interface

Claude's extended thinking capability lets it reason through multi-step tool usage, chaining multiple API calls to answer complex questions

Enterprise-grade security with local config storage — your tokens never leave your machine, and connections go directly to the Vinkius Edge network

Sift (Chargeback) + Claude Desktop Use Cases

Practical scenarios where Claude Desktop combined with the Sift (Chargeback) MCP Server delivers measurable value.

Interactive data exploration: ask Claude to query DNS records, look up WHOIS data, and cross-reference results in a single conversation

Ad-hoc security audits: type a domain name and let Claude enumerate subdomains, check DNS history, and flag configuration anomalies — all through natural language

Executive briefings: generate comprehensive domain intelligence reports by asking Claude to compile findings into a formatted summary

Learning and training: new team members can explore API capabilities conversationally without needing to read documentation

Sift (Chargeback) MCP Tools for Claude Desktop (8)

These 8 tools become available when you connect Sift (Chargeback) to Claude Desktop via MCP:

apply_user_decision

Apply a manual decision to a user (e.g. block_user)

get_user_fraud_labels

Retrieve labels (e.g. $bad, $good) applied to a user

get_user_fraud_score

Get the current fraud score for a user

list_sift_decisions

List available decisions (actions) in Sift

list_sift_workflows

List configured fraud prevention workflows

list_user_decision_history

List the history of decisions applied to a user

report_sift_chargeback

Report a chargeback event to Sift

track_sift_event

Track a general event (e.g. $login, $transaction) in Sift

Example Prompts for Sift (Chargeback) in Claude Desktop

Ready-to-use prompts you can give your Claude Desktop agent to start working with Sift (Chargeback) immediately.

"What is the fraud score for user 'user_abc_123'?"

"Report a chargeback for order #999 from user 'user_789' as '$fraud'."

"Show me the last 5 decisions applied to user 'user_456'."

Troubleshooting Sift (Chargeback) MCP Server with Claude Desktop

Common issues when connecting Sift (Chargeback) to Claude Desktop through the Vinkius, and how to resolve them.

Server not appearing after restart

Ensure the JSON is valid (no trailing commas). Check the file path: ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\\Claude\\ (Windows).

Authentication error

Verify your Vinkius token is correct. Go to cloud.vinkius.com to regenerate it if needed.

Tools not showing in chat

Click the 🔌 icon at the bottom of the chat input. If it shows 0 tools, the server may still be connecting — wait a few seconds.

Sift (Chargeback) + Claude Desktop FAQ

Common questions about integrating Sift (Chargeback) MCP Server with Claude Desktop.

How does Claude Desktop discover MCP tools?

When Claude Desktop starts, it reads the claude_desktop_config.json file and connects to each configured MCP server. It calls the tools/list endpoint to fetch the schema for every available tool, then surfaces them as clickable options in the chat interface via the 🔌 icon.

What happens if the MCP server is temporarily unavailable?

Claude Desktop handles disconnections gracefully — if the server is unreachable at startup, the tools simply won't appear. Once the server becomes available again, restarting Claude Desktop will re-establish the connection. There is no timeout penalty or error loop.

Can I connect multiple MCP servers simultaneously?

Yes. You can add as many servers as you need in the mcpServers section of the config file. Each server appears as a separate tool provider, and Claude can use tools from multiple servers in a single conversation turn.

Is there a limit on the number of tools per server?

Claude Desktop can handle hundreds of tools per server. However, for optimal LLM performance, Vinkius servers are designed to expose focused, well-documented tool sets rather than overwhelming the model with too many options.

Does Claude Desktop support Streamable HTTP transport?

Yes. Claude Desktop supports both SSE (Server-Sent Events) and the newer Streamable HTTP transport that Vinkius uses. Simply provide the server URL — Claude auto-negotiates the transport protocol.