Repayment Calculation API API ID: 5456

Precisely create loan repayment schedules with the Repayment Calculator API.
Use this API from your AI agent via MCP
Works with OpenClaw, Claude Code/Desktop, Cursor, Windsurf, Cline and any MCP-compatible AI client.
Docs & setup
Create a skill by wrapping this MCP: https://mcp.zylalabs.com/mcp?apikey=YOUR_ZYLA_API_KEY

About the API:  

The Repayment Calculation API is designed to assist developers in creating applications that generate comprehensive loan repayment schedules. Whether you're building a financial planning tool, a banking interface, or a loan management system, this API offers essential features to accurately calculate and display loan repayment schedules.

A key feature of the Repayment Calculation API is its ability to produce detailed loan amortization schedules based on parameters provided by the user. Users can input critical loan details such as principal amount, interest rate, loan term, and repayment frequency to generate an accurate repayment schedule. This functionality helps users break down their loan payments, including the allocation of principal and interest over time.

When it comes to integration, the Repayment Calculation API ensures smooth and easy integration into applications. With its straightforward endpoint and clear documentation, users can quickly implement the API into their systems with minimal effort.

At its core, the Repayment Calculation API offers a powerful set of tools for developing applications with full loan repayment functionality. With precise calculations, customizable options, and easy integration, the API enables users to create innovative financial solutions for various lending and financial service applications.

API Documentation

Endpoints


To use this endpoint you must indicate the annual interest, start date, installments and principal amount in the parameters.



                                                                            
GET https://pr189-testing.zylalabs.com/api/5456/repayment+calculation+api/7079/calculate+payments
                                                                            
                                                                        

Calculate Payments - Endpoint Features

Object Description
annualInterestRate [Required] Indicates anual interest rate
startDate [Required] Indicates start date
installmentCount [Required] Indicates payment installments
principalAmount [Required] Indicates an amount

Free test requests remaining: 3 of 3.


INPUT PARAMETERS

annualInterestRate
startDate
installmentCount
principalAmount

API EXAMPLE RESPONSE

[{"date":"2023-06-15","interest":41.666666666666664,"principal":814.4081512180071,"payment":856.0748178846737,"balance":9185.591848781993},{"date":"2023-07-15","interest":38.27329936992497,"principal":817.8015185147488,"payment":856.0748178846737,"balance":8367.790330267244},{"date":"2023-08-15","interest":34.86579304278018,"principal":821.2090248418936,"payment":856.0748178846737,"balance":7546.58130542535},{"date":"2023-09-15","interest":31.444088772605625,"principal":824.6307291120681,"payment":856.0748178846737,"balance":6721.950576313282},{"date":"2023-10-15","interest":28.00812740130534,"principal":828.0666904833683,"payment":856.0748178846737,"balance":5893.883885829913},{"date":"2023-11-15","interest":24.557849524291306,"principal":831.5169683603824,"payment":856.0748178846737,"balance":5062.366917469531},{"date":"2023-12-15","interest":21.093195489456377,"principal":834.9816223952173,"payment":856.0748178846737,"balance":4227.385295074313},{"date":"2024-01-15","interest":17.61410539614297,"principal":838.4607124885308,"payment":856.0748178846737,"balance":3388.9245825857824},{"date":"2024-02-15","interest":14.120519094107427,"principal":841.9542987905663,"payment":856.0748178846737,"balance":2546.9702837952163},{"date":"2024-03-15","interest":10.612376182480068,"principal":845.4624417021937,"payment":856.0748178846737,"balance":1701.5078420930226},{"date":"2024-04-15","interest":7.0896160087209275,"principal":848.9852018759528,"payment":856.0748178846737,"balance":852.5226402170698},{"date":"2024-05-15","interest":3.552177667571124,"principal":852.5226402171027,"payment":856.0748178846737,"balance":-3.285549610154703e-11}]

Calculate Payments - CODE SNIPPETS


curl --location --request GET 'https://zylalabs.com/api/5456/repayment+calculation+api/7079/calculate+payments?annualInterestRate=5&startDate=2023-06-15&installmentCount=12&principalAmount=10000' --header 'Authorization: Bearer YOUR_API_KEY' 


    

API Access Key & Authentication

After signing up, every developer is assigned a personal API access key, a unique combination of letters and digits provided to access to our API endpoint. To authenticate with the Repayment Calculation API simply include your bearer token in the Authorization header.
Headers
Header Description
Authorization [Required] Should be Bearer access_key. See "Your API Access Key" above when you are subscribed.

Simple Transparent Pricing

No long-term commitment. Upgrade, downgrade, or cancel anytime. Free Trial includes up to 50 requests.

🚀 Enterprise

Starts at
$ 10,000/Year


  • Custom Volume
  • Custom Rate Limit
  • Specialized Customer Support
  • Real-Time API Monitoring

Customer favorite features

  • ✔︎ Only Pay for Successful Requests
  • ✔︎ Free 7-Day Trial
  • ✔︎ Multi-Language Support
  • ✔︎ One API Key, All APIs.
  • ✔︎ Intuitive Dashboard
  • ✔︎ Comprehensive Error Handling
  • ✔︎ Developer-Friendly Docs
  • ✔︎ Postman Integration
  • ✔︎ Secure HTTPS Connections
  • ✔︎ Reliable Uptime

Repayment Calculation API FAQs

Users must indicate the annual interest rate, start date, installment count and principal amount in order to use this API.

The Repayment Calculation API designed to help users build applications that offer comprehensive loan amortization schedules.

There are different plans to suit all tastes, including a free trial for a small number of requests, but your rate is limited to avoid abuse of the service.

The API uses API keys for authentication. To access the API, include your API key in the request header. The API key is provided upon registration and should be kept secure.

The Repayment Calculation API provides loan details, including payment dates, interest, principal, total payment, and remaining balance.

The Calculate Payments endpoint returns a detailed loan amortization schedule, including payment dates, interest amounts, principal amounts, total payments, and remaining balances for each installment.

The key fields in the response data include "date" (payment date), "interest" (interest portion of the payment), "principal" (principal portion), "payment" (total payment amount), and "balance" (remaining loan balance).

The response data is organized as an array of objects, each representing a payment period with fields for date, interest, principal, payment, and balance, allowing for easy iteration and analysis.

Users can customize their requests by providing parameters such as annual interest rate, start date, number of installments, and principal amount to generate tailored repayment schedules.

Users can analyze the returned data to understand payment breakdowns, track remaining balances over time, and visualize the amortization process, aiding in financial planning and decision-making.

Typical use cases include developing financial planning tools, banking applications, and loan management systems that require accurate loan repayment schedules and amortization details.

Data accuracy is maintained through precise calculations based on user-provided parameters, ensuring that the generated repayment schedules reflect the correct financial scenarios.

Users can expect a consistent pattern in the response, where each installment shows decreasing interest and increasing principal payments, reflecting the amortization process over the loan term.

General FAQs

To obtain your API key, first sign in to your account and navigate to the API you want to use. From the API's Pricing section, choose a plan and complete the subscription process. Once subscribed, return to the API page and you will see your API Access Key displayed at the top of the documentation page. You can use this key to authenticate your requests.

You can’t switch APIs during the free trial. If you subscribe to a different API, your trial will end and the new subscription will start as a paid plan.

The free trial lasts for 7 days and allows you to make up to 50 API requests.

No, the free trial is available only once, so we recommend using it on the API that interests you the most. Most of our APIs offer a free trial, but some may not include this option.

Yes. If the API offers a free trial, you will see a "Free 7-Day Trial" option in its Pricing section. The trial lasts for 7 days and allows up to 50 API requests, enabling you to evaluate the API before subscribing to a paid plan.

Zyla API Hub is like a big store for APIs, where you can find thousands of them all in one place. We also offer dedicated support and real-time monitoring of all APIs. Once you sign up, you can pick and choose which APIs you want to use. Just remember, each API needs its own subscription. But if you subscribe to multiple ones, you'll use the same key for all of them, making things easier for you.

Prices are listed in USD (United States Dollar), EUR (Euro), CAD (Canadian Dollar), AUD (Australian Dollar), and GBP (British Pound). We accept all major debit and credit cards. Our payment system uses the latest security technology and is powered by Stripe, one of the world's most reliable payment companies. If you have any trouble paying by card, just contact us at [email protected]

Additionally, if you already have an active subscription in any of these currencies (USD, EUR, CAD, AUD, GBP), that currency will remain for subsequent subscriptions. You can change the currency at any time as long as you don't have any active subscriptions.
The local currency shown on the pricing page is based on the country of your IP address and is provided for reference only. The actual prices are in USD (United States Dollar). When you make a payment, the charge will appear on your card statement in USD, even if you see the equivalent amount in your local currency on our website. This means you cannot pay directly with your local currency.
Occasionally, a bank may decline the charge due to its fraud protection settings. We suggest reaching out to your bank initially to check if they are blocking our charges. Also, you can access the Billing Portal and change the card associated to make the payment. If these does not work and you need further assistance, please contact our team at [email protected]
Prices are determined by a recurring monthly or yearly subscription, depending on the chosen plan.
API calls are deducted from your plan based on successful requests. Each plan comes with a specific number of calls that you can make per month. Only successful calls, indicated by a Status 200 response, will be counted against your total. This ensures that failed or incomplete requests do not impact your monthly quota.
Zyla API Hub works on a recurring monthly subscription system. Your billing cycle will start the day you purchase one of the paid plans, and it will renew the same day of the next month. So be aware to cancel your subscription beforehand if you want to avoid future charges.
To upgrade your current subscription plan, simply go to the pricing page of the API and select the plan you want to upgrade to. The upgrade will be instant, allowing you to immediately enjoy the features of the new plan. Please note that any remaining calls from your previous plan will not be carried over to the new plan, so be aware of this when upgrading. You will be charged the full amount of the new plan.
To check how many API calls you have left for the current month, refer to the 'X-Zyla-API-Calls-Monthly-Remaining' field in the response header. For example, if your plan allows 1,000 requests per month and you've used 100, this field in the response header will indicate 900 remaining calls.

You can monitor your API usage through the response headers included with every request:

x-zyla-api-calls-monthly-used: Shows the total number of API requests you have used during the current billing period.
x-zyla-api-calls-monthly-remaining: Shows the number of API requests you have remaining for the current billing period.

The 'X-Zyla-RateLimit-Reset' header shows the number of seconds until your rate limit resets. This tells you when your request count will start fresh. For example, if it displays 3,600, it means 3,600 seconds are left until the limit resets.

Yes, you can cancel your subscription at any time. Simply go to the Pricing section of the API you're subscribed to and click the "Unsubscribe" button.

Please note that upgrades, downgrades, and cancellations take effect immediately. Once your subscription is canceled, access to the service will end immediately, regardless of any remaining API calls in your quota.

After 7 days, you will be charged the full amount for the plan you were subscribed to during the trial. Therefore, it's important to cancel before the trial period ends. Refund requests for forgetting to cancel on time are not accepted.
When you subscribe to an API free trial, you can make up to 50 API calls. If you wish to make additional API calls beyond this limit, the API will prompt you to perform an "Start Your Paid Plan." You can find the "Start Your Paid Plan" button in your profile under Subscription -> Choose the API you are subscribed to -> Pricing tab.
You can contact us through our chat channel to receive immediate assistance. We are always online from 8 am to 5 pm (EST). If you reach us after that time, we will get back to you as soon as possible. Additionally, you can contact us via email at [email protected]

Please have a look at our Refund Policy: https://zylalabs.com/terms#refund


Related APIs