Tax Loss Harvesting MCP for AI. Calculate Tax Savings Across Borders.
Works with every AI agent you already use
…and any MCP-compatible client








How this MCP server connects to your AI agent
The Tax Loss Harvesting Calculator MCP determines your potential tax savings by analyzing capital losses against gains. It calculates net economic benefits after reinvestment friction and checks for compliance windows in multiple jurisdictions like the USA or Germany.
What AI agents can do with Tax Loss Harvesting Calculator Automation
Evaluate harvesting opportunity
Calculates the potential tax benefits and net economic impact of harvesting losses.
Retrieve tax rate by jurisdiction
Gets the correct capital gains percentage based on your location and income bracket.
Get wash sale window
Determines the regulatory period for wash sale compliance in a given country.
Determines the net economic benefit and avoided taxes from harvesting capital losses.
Finds the specific regulatory period required to avoid a wash sale violation in your chosen country.
Retrieves the current applicable capital gains tax percentage based on both jurisdiction and income bracket.
Ask an AI about this
Waiting for input…
What AI agents can do with Tax Loss Harvesting Calculator: 3 Tools
These three tools allow you to calculate potential tax benefits, verify regulatory timelines, and look up accurate capital gains rates for your financial plans.
Make your AI actually useful.
Add this MCP to Claude, Cursor, or Windsurf and your AI stops guessing. It gets real tools to look things up, take action, and handle the stuff you keep doing by hand.
Start using Tax Loss Harvesting Calculator on VinkiusEvaluate Harvesting Opportunity
Calculates the potential tax benefits and net economic impact of harvesting losses.
Retrieve Tax Rate By Jurisdiction
Gets the correct capital gains percentage based on your location and income bracket.
Get Wash Sale Window
Determines the regulatory period for wash sale compliance in a given country.
Security and governance baked right in.
Pick your AI client below to get set up. Just create a Vinkius account, subscribe, and you're instantly up and running. We handle the entire backend infrastructure, delivering out-of-the-box support for HTTPS Streamable, SSE, and OAuth2—zero messy routing required.
Choose How to Get Started
Build a custom MCP for your own tools, or connect a ready-made integration from our catalog.
Build Your Own
Turn any API into an MCP. Import a spec, define Agent Skills, or deploy with MCPFusion.
- Import from OpenAPI, Swagger, or YAML specs
- Create Agent Skills with progressive disclosure
- Deploy to edge with MCPFusion framework
- Built in DLP, auth, and compliance on every call
- Real time usage dashboard and cost metering
- Publish to catalog or keep private
Make Your AI Do More
Start with Tax Loss Harvesting Calculator, then connect any of our 5,100+ other servers whenever your AI needs more. One click, no limits.
- Use this MCP plus 5,100+ others, all in one place
- Add new capabilities to your AI anytime you want
- Every connection is secured and compliant automatically
- Track usage and costs across all your servers
- Works with Claude, ChatGPT, Cursor, and more
- New servers added to the catalog every week
Independent Platform Disclaimer: Vinkius is an independent platform and is not affiliated with, endorsed by, sponsored by, verified by, or otherwise authorized by Tax Loss Harvesting Calculator. All third-party trademarks, logos, and brand names are the property of their respective owners. Their use on this website is strictly for informational purposes to identify service compatibility and interoperability.
VINKIUS INFRASTRUCTURE
Cloud Hosted
Managed infra
V8 Isolated
Sandboxed per request
Zero-Trust Proxy
No stored credentials
DLP Enforced
Policy on every call
GDPR Compliant
EU data residency
Token Compression
~60% cost reduction
Built on the Model Context Protocol (MCP) for Claude, ChatGPT, Cursor, and more
The Model Context Protocol standardizes how applications expose capabilities to LLMs. Instead of operating in isolation, your AI gains direct access to external platforms, live data, and real-world actions through secure, standardized connections.
This connection provides 3 powerful capabilities that interface natively with Claude, ChatGPT, Cursor, and other compatible AI platforms. No middleware. No custom integration required.
Tax planning used to mean endless tab switching and spreadsheets., Solved with Vinkius AI Gateway
Today, figuring out tax-loss harvesting requires hopping between rate tables, checking different country's regulatory calendars, and manually running loss/gain scenarios. You copy numbers from one spreadsheet into another, hoping you haven't mixed up US state law with EU guidelines.
With this MCP, the process is direct. Instead of juggling multiple documents, your agent handles the complexity. It delivers a single, actionable report showing exactly how much tax you avoid and what the net savings are.
The Tax Loss Harvesting Calculator gives you certainty.
You no longer have to manually confirm if your intended sale period violates a wash sale rule. The MCP checks this specific window, which is often the trickiest part of compliance.
Now, you get immediate confirmation on regulatory status and projected savings in one pass. It's about reliable, accurate data when filing taxes.
What your AI can actually do with this
Tax loss harvesting is complex, involving specific rules about timing and jurisdiction that change constantly. This connector provides specialized tools to calculate exactly how much tax you can avoid by strategically selling assets. You use it to determine avoided taxes and net savings after factoring in reinvestment costs. Need to know if a sale triggers a wash sale rule? It checks the compliance window for you, regardless of where you are located.
Plus, you can retrieve current capital gains rates based on your income band and location. When building out financial workflows with Vinkius, this MCP adds deep tax intelligence directly into your process, letting you focus on strategy instead of compliance rules.
019edd9e-85af-727c-8ae0-69722752e25d Here's how it actually works
The bottom line is you get an accurate financial projection of your tax optimization potential for multiple locations.
First, you specify your location (jurisdiction) and the details of your losses or gains.
Next, it calculates the applicable capital gains tax rate for that area and checks if any sales fall into a regulatory wash sale period.
Finally, the MCP provides a net savings calculation, showing avoided taxes minus any reinvestment friction costs.
Who is this actually for?
Financial advisors and wealth managers need this. If you're tired of manually cross-referencing IRS code, German tax law, and investment reports to plan client strategies, this MCP is built for you.
Uses it to run comparative analyses across multiple clients, checking both their state's capital gains rates and potential wash sale periods before recommending a portfolio adjustment.
Checks the overall viability of tax-loss harvesting plans by inputting various loss amounts to project maximum avoided taxes for annual client reviews.
Determines jurisdictional compliance windows and verifies accurate capital gains rates when advising on cross-border asset sales.
What Changes When You Connect
Avoid guesswork on tax planning. By using retrieve_tax_rate_by_jurisdiction, you immediately get the current capital gains percentage for any location and income band.
Stay compliant with international rules. The get_wash_sale_window tool checks specific regulatory periods, so you never risk an accidental wash sale violation.
See the true bottom line. Running evaluate_harvesting_opportunity gives you a net savings figure, accounting for reinvestment costs and fees.
Plan globally without limitations. You can check compliance windows in different countries—like comparing USA vs. German rules—from one place.
Speed up advisory work. Instead of manually pulling rates from multiple tax code websites, this MCP delivers the necessary rate instantly.
See it in action
Rebalancing a Portfolio After Gains
A client sold several appreciated stocks and needs to know how much they can safely sell now. They use evaluate_harvesting_opportunity to project tax savings, then use retrieve_tax_rate_by_jurisdiction to confirm the rate for their state before finalizing the trades.
Cross-Border Investment Review
An advisor is moving a client from the US to Germany. They first use get_wash_sale_window to understand the German rules, then check rates with retrieve_tax_rate_by_jurisdiction to plan assets for their new tax environment.
Post-Loss Strategy Check
A client has a large loss event. They input the details into evaluate_harvesting_opportunity. The tool immediately calculates the avoided taxes, letting them know exactly what they can save and how much capital remains after fees.
The honest tradeoffs
Assuming a simple percentage calculation
Manually calculating tax savings by just multiplying loss amount by the stated rate. This ignores reinvestment friction and jurisdictional timing rules.
Use evaluate_harvesting_opportunity to get a net savings figure that accounts for fees and investment costs. Always verify your jurisdiction using retrieve_tax_rate_by_jurisdiction first.
Ignoring regulatory timing
Selling assets without checking the current date against compliance windows, risking a wash sale violation that nullifies tax benefits.
Before any trade, run get_wash_sale_window to confirm the exact dates you are operating within for your specific country.
Mixing up state and federal rates
Using a generic 15% rate found online without confirming if it applies to the client's actual income band or residency status.
Always use retrieve_tax_rate_by_jurisdiction first. This ensures the capital gains percentage is accurate for both their location and current income level.
When It Fits, When It Doesn't
Use this MCP if your primary need is calculating tax benefits based on complex, multi-factor inputs like jurisdiction, loss amounts, and regulatory timing. Specifically, you must check jurisdictional rules using retrieve_tax_rate_by_jurisdiction before making any calculation with evaluate_harvesting_opportunity. You absolutely must use the MCP if your strategy involves cross-border moves or highly regulated assets because of the compliance checks provided by get_wash_sale_window. Don't use this if you just need a simple arithmetic calculator; these tools solve complex financial modeling problems, not basic math.
Questions you might have
How does the Tax Loss Harvesting Calculator use `evaluate_harvesting_opportunity`? +
It calculates your potential tax benefits and net economic impact. You input your losses and fees, and it spits out the total avoided taxes minus any reinvestment friction cost.
What does `get_wash_sale_window` tell me? +
This tool determines the specific regulatory window for wash sale compliance. It tells you if a sale is allowed right now based on your chosen jurisdiction.
Do I need to use `retrieve_tax_rate_by_jurisdiction` first? +
Yes, always. You must confirm the correct capital gains rate for both your location and income band before calculating any tax savings or planning a harvest.
Can I check multiple countries in one go using Tax Loss Harvesting Calculator? +
The MCP is designed to handle comparisons. You can use the jurisdiction tools to compare rules between areas like the USA and Germany efficiently.
When calculating losses, how does `evaluate_harvesting_opportunity` account for transaction fees? +
The tool requires you to input any associated fees. It automatically factors these costs into the calculation, giving you the net savings figure after commissions or other friction costs.
If I check a country using `get_wash_sale_window` that is outside its supported regions, what happens? +
It returns an explicit error detailing unsupported geography. You must use the tool only for jurisdictions listed in its documentation; it won't guess or provide approximations.
Does `retrieve_tax_rate_by_jurisdiction` need my exact income figures to work? +
No, you just need your jurisdiction and an approximate income band. This is enough information for the tool to retrieve the applicable capital gains rate range.
What if I have a complex tax situation that crosses multiple state lines when running `evaluate_harvesting_opportunity`? +
The MCP handles single-jurisdiction calculations. For complicated, multi-state scenarios, you'll need to run separate calculations for each relevant jurisdiction and sum the results yourself.
How do I calculate my potential tax savings? +
Use the evaluate_harvesting_opportunity tool by providing your current positions, the applicable tax rate, and any reinvestment friction costs.
What is the wash sale rule window for the USA? +
For the USA, the get_wash_sale_window tool confirms a 30-day period surrounding the transaction where you must avoid repurchasing substantially identical securities.
Can I retrieve tax rates for European countries? +
Yes, use retrieve_tax_rate_by_jurisdiction to get the flat capital gains rate for supported EU nations.
We've already built the connector for Tax Loss Harvesting. Just plug in your AI agents and start using Vinkius.
No hosting. No infrastructure. No complex setup.
All 3 tools are live and waiting.
You're up and running in seconds.
Vinkius gives your AI agents access to the full catalog of app connectors, all fully managed, secure, and enterprise-ready. One subscription, every tool you need.
Built, hosted, and secured by Vinkius. You just connect and go.