# US Post-Judgment Interest Calculator MCP for AI Agents AI Agent Connect > US Post-Judgment Interest Calculator helps you figure out exactly how much interest has built up on a federal court judgment. It uses official Treasury Bill rates to calculate totals between specific dates, making it easy to see how much a debt has grown or how much an early payment will save a debtor. It ensures your calculations follow 28 U.S.C. § 1961 standards for legal accuracy. ## Overview - **Category:** finance - **Price:** Free - **Endpoint:** https://edge.vinkius.com/vk_preview_uPkfKfxEt1wCZYd57qd2sZhzpo0YaXcgjEjhJIqe/ai-agent-connect - **Tags:** interest-rate, us-federal-law, treasury-bills, judgment-accrual, financial-calculator ## Description This Connector provides precise calculations for US Federal post-judgment interest as mandated by 28 U.S.C. § 1961. Handling federal judgment interest is a tedious manual process that requires constant attention to detail. You have to find the specific week a judgment was entered, look up the Treasury Bill rates for that period, and then build a spreadsheet to account for every week of accrual since then. It is a high-risk process where a single mistake in a cell can ruin a settlement offer or lead to legal disputes over payoff amounts. This Connector takes that complexity off your plate. Instead of hunting for historical rates and manually doing the math, your agent can handle the heavy lifting. It pulls the correct annual rates for any given week and runs the numbers for you. If you need to show a client the difference between paying now versus waiting three months, it can run those scenarios in seconds. It is a precise way to handle financial data without the risk of manual entry errors. You will find this useful when managing large portfolios of litigation debt or preparing settlement offers where every cent of interest counts. It is one of the specialized tools available in the Vinkius catalog that turns a tedious research task into a quick prompt. You get the exact payoff amount without the headache of manual data verification. You can also use it to audit historical balances or verify that a debtor's payment matches the current legal requirement. It replaces the need for complex formulas and manual data gathering with a direct, reliable result. ## Tools ### interest_accrual_calc Calculate the total interest and updated balance for a specific judgment. It provides the current payoff amount based on federal rules. ### rate_lookup Find the annual interest rate for a specific date. It pulls the correct Treasury Bill data required by law. ### interest_scenario_comparison Compare interest costs between two different payment dates. Use this to show a debtor the savings of an early payment. ## Prompt Examples **Prompt:** ``` How much interest has accrued on a $10,000 judgment from 2024-01-01 to 2024-06-01? ``` **Response:** ``` The total interest accrued on the $10,000 judgment from January 1, 2024, to June 1, 2024, is **$150.00**, bringing the total balance to **$10,150.00**. ``` **Prompt:** ``` What was the Treasury Bill rate for 2024-02-15? ``` **Response:** ``` The annual interest rate applicable for the week containing February 15, 2024, was **5.35%**. ``` **Prompt:** ``` Compare interest costs for a $5,000 judgment if I pay on 2024-12-01 versus 2025-03-01. ``` **Response:** ``` Choosing to pay on March 1, 2025, instead of December 1, 2024, will result in an **additional interest cost of $42.50**. ``` ## Capabilities ### Find annual interest rates Get the specific Treasury Bill rate for any week in history. ### Calculate total debt growth See the exact interest and updated balance for a judgment. ### Compare payment dates See the cost difference between two different payment timelines. ### Verify legal compliance Ensure your calculations match the 28 U.S.C. § 1961 standards. ### Run settlement scenarios Quickly check how much a debtor saves by paying early. ## Use Cases ### Settlement Negotiation A lawyer wants to show a debtor that paying today saves $500 in interest. They ask the agent to compare two dates using interest_scenario_comparison. ### Debt Portfolio Auditing A collector needs the current balance for 50 different judgments. The agent uses interest_accrual_calc to update the entire list. ### Historical Rate Verification A firm needs to know what the interest rate was in mid-2022. The agent uses rate_lookup to find the exact weekly rate. ### Client Reporting A firm provides a monthly update on a judgment balance. The agent calculates the growth since the last update using interest_accrual_calc. ## Benefits - Stop hunting for historical Treasury rates manually. Use rate_lookup to get the correct annual figures instantly. - Eliminate calculation errors in settlement offers. Use interest_accrual_calc to get precise totals every time. - Show debtors the real cost of waiting. Use interest_scenario_comparison to create clear, data-backed payment incentives. - Ensure compliance with 28 U.S.C. § 1961. This Connector handles the specific federal rules so you do not have to. - Speed up your debt collection workflow. Get payoff balances in seconds instead of spending minutes on a spreadsheet. ## How It Works The bottom line is you get legally compliant interest totals without the manual research. 1. Provide the judgment amount and the original date of the court order. 2. Specify the target payment date or the range of time you want to analyze. 3. Receive a breakdown of the accrued interest and the final balance. ## Frequently Asked Questions **How does the US Post-Judgment Interest Calculator handle different dates?** It looks up the specific Treasury Bill rate for every week between your judgment date and your target date to ensure the total is accurate. **Can the US Post-Judgment Interest Calculator help with settlement offers?** Yes, you can use it to show a debtor exactly how much they save by paying early versus waiting. **Is the US Post-Judgment Interest Calculator compliant with federal law?** It specifically follows the rules set out in 28 U.S.C. § 1961 for federal judgment interest. **Does the US Post-Judgment Interest Calculator use current market rates?** It uses the weekly Treasury Bill rates as mandated by federal law to calculate the accrual. **What if I need to find a rate for a specific week in the past?** The tool can look up historical annual rates for any specific date you provide. **Can I use the US Post-Judgment Interest Calculator for state-level judgments?** This tool is designed for US Federal judgments; state rules may vary and might not follow the same Treasury Bill guidelines. **How is the interest rate determined?** The server uses weekly Treasury Bill rates as specified by 28 U.S.C. § 1961 to calculate the interest accrual for each period. **Can I compare two different payment dates?** Yes, you can use the `interest_scenario_comparison` tool to see the difference in interest costs between an early and a late payment date. **What happens if I need a rate for a specific week?** You can use the `rate_lookup` tool by providing a reference date to retrieve the annual interest rate active during that week.