Interest RateInterest Rate API

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Interest Rate is a tool for retrieving current and historical central bank policy interest rates for major economies worldwide. It returns the latest rate along with the central bank name and effective date.

The Interest Rate API provides reliable and fast access to interest rate data through a simple REST interface. Built for developers who need consistent, high-quality results with minimal setup time.

To use Interest Rate, you need an API key. You can get one by creating a free account and visiting your dashboard.

GET Endpoint

URL
https://api.apiverve.com/v1/interestrate

Code Examples

Here are examples of how to call the Interest Rate API in different programming languages:

cURL Request
curl -X GET \
  "https://api.apiverve.com/v1/interestrate?country=US" \
  -H "X-API-Key: your_api_key_here"
JavaScript (Fetch API)
const response = await fetch('https://api.apiverve.com/v1/interestrate?country=US', {
  method: 'GET',
  headers: {
    'X-API-Key': 'your_api_key_here',
    'Content-Type': 'application/json'
  }
});

const data = await response.json();
console.log(data);
Python (Requests)
import requests

headers = {
    'X-API-Key': 'your_api_key_here',
    'Content-Type': 'application/json'
}

response = requests.get('https://api.apiverve.com/v1/interestrate?country=US', headers=headers)

data = response.json()
print(data)
Node.js (Native HTTPS)
const https = require('https');
const url = require('url');

const options = {
  method: 'GET',
  headers: {
    'X-API-Key': 'your_api_key_here',
    'Content-Type': 'application/json'
  }
};

const req = https.request('https://api.apiverve.com/v1/interestrate?country=US', options, (res) => {
  let data = '';
  res.on('data', (chunk) => data += chunk);
  res.on('end', () => console.log(JSON.parse(data)));
});

req.end();
PHP (cURL)
<?php

$ch = curl_init();

curl_setopt($ch, CURLOPT_URL, 'https://api.apiverve.com/v1/interestrate?country=US');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'GET');
curl_setopt($ch, CURLOPT_HTTPHEADER, [
    'X-API-Key: your_api_key_here',
    'Content-Type: application/json'
]);

$response = curl_exec($ch);
curl_close($ch);

$data = json_decode($response, true);
print_r($data);

?>
Go (net/http)
package main

import (
    "fmt"
    "io"
    "net/http"

)

func main() {
    req, _ := http.NewRequest("GET", "https://api.apiverve.com/v1/interestrate?country=US", nil)

    req.Header.Set("X-API-Key", "your_api_key_here")
    req.Header.Set("Content-Type", "application/json")

    client := &http.Client{}
    resp, err := client.Do(req)
    if err != nil {
        panic(err)
    }
    defer resp.Body.Close()

    body, _ := io.ReadAll(resp.Body)
    fmt.Println(string(body))
}
Ruby (Net::HTTP)
require 'net/http'
require 'json'

uri = URI('https://api.apiverve.com/v1/interestrate?country=US')
http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = true

request = Net::HTTP::Get.new(uri)
request['X-API-Key'] = 'your_api_key_here'
request['Content-Type'] = 'application/json'

response = http.request(request)
puts JSON.pretty_generate(JSON.parse(response.body))
C# (HttpClient)
using System;
using System.Net.Http;
using System.Text;
using System.Threading.Tasks;

class Program
{
    static async Task Main(string[] args)
    {
        using var client = new HttpClient();
        client.DefaultRequestHeaders.Add("X-API-Key", "your_api_key_here");

        var response = await client.GetAsync("https://api.apiverve.com/v1/interestrate?country=US");
        response.EnsureSuccessStatusCode();

        var responseBody = await response.Content.ReadAsStringAsync();
        Console.WriteLine(responseBody);
    }
}

Authentication

The Interest Rate API requires authentication via API key. Include your API key in the request header:

Required Header
X-API-Key: your_api_key_here

Learn more about authentication →

Interactive API Playground

Test the Interest Rate API directly in your browser with live requests and responses.

Parameters

The Interest Rate API supports multiple query options. Use one of the following:

Some Interest Rate parameters marked with Premium are available exclusively on paid plans.View pricing

Option 1: Get Current Interest Rate

ParameterTypeRequiredDescriptionDefaultExample
countrystringrequired
2-letter country code
Length: 2 - 2 chars
Supported values: AUBRCACHCN
-US

Option 2: Get Historical Interest Rate

ParameterTypeRequiredDescriptionDefaultExample
countrystringrequired
2-letter country code
Length: 2 - 2 chars
Supported values: AUBRCACHCN
-US
datePremiumstringrequired
Month to retrieve in YYYY-MM format
-2024-06

Response

The Interest Rate API returns responses in JSON, XML, YAML, and CSV formats:

Example Responses

JSON Response
200 OK
{
  "status": "ok",
  "error": null,
  "data": {
    "country": "US",
    "countryName": "United States",
    "centralBank": "Federal Reserve",
    "rate": 4.5,
    "date": "2026-02-05",
    "lastUpdated": "2026-02-05T05:00:00.000Z",
    "lastChanged": "2026-01-29",
    "change": -0.25,
    "changeDirection": "down",
    "previousRate": 4.75
  }
}
XML Response
200 OK
<?xml version="1.0" encoding="UTF-8"?>
<response>
  <status>ok</status>
  <error xsi:nil="true" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"/>
  <data>
    <country>US</country>
    <countryName>United States</countryName>
    <centralBank>Federal Reserve</centralBank>
    <rate>4.5</rate>
    <date>2026-02-05</date>
    <lastUpdated>2026-02-05T05:00:00.000Z</lastUpdated>
    <lastChanged>2026-01-29</lastChanged>
    <change>-0.25</change>
    <changeDirection>down</changeDirection>
    <previousRate>4.75</previousRate>
  </data>
</response>
YAML Response
200 OK
status: ok
error: null
data:
  country: US
  countryName: United States
  centralBank: Federal Reserve
  rate: 4.5
  date: '2026-02-05'
  lastUpdated: '2026-02-05T05:00:00.000Z'
  lastChanged: '2026-01-29'
  change: -0.25
  changeDirection: down
  previousRate: 4.75
CSV Response
200 OK
keyvalue
countryUS
countryNameUnited States
centralBankFederal Reserve
rate4.5
date2026-02-05
lastUpdated2026-02-05T05:00:00.000Z
lastChanged2026-01-29
change-0.25
changeDirectiondown
previousRate4.75

Response Structure

All API responses follow a consistent structure with the following fields:

FieldTypeDescriptionExample
statusstringIndicates whether the request was successful ("ok") or failed ("error")ok
errorstring | nullContains error message if status is "error", otherwise nullnull
dataobject | nullContains the API response data if successful, otherwise null{...}

Learn more about response formats →

Response Data Fields

When the request is successful, the data object contains the following fields:

Response fields marked with Premium are available exclusively on paid plans.View pricing
FieldTypeSample ValueDescription
countrystring"US"Two-letter ISO country code for the nation
countryNamestring"United States"Full name of the country in English
centralBankstring"Federal Reserve"Name of the central bank managing monetary policy
ratenumber4.5Central bank policy interest rate for the requested period
datestring"2026-02-05"Exact date of the rate observation
lastUpdatedstring"2026-02-05T05:00:00.000Z"ISO timestamp of the last data refresh update
lastChangedPremiumstring"2026-01-29"Date when the rate was last changed
changePremiumnumber-0.25Size of the last rate change in percentage points
changeDirectionstring"down"Direction of last change: up, down, or unchanged
previousRatePremiumnumber4.75Rate before the last change

Headers

Required and optional headers for Interest Rate API requests:

Header NameRequiredExample ValueDescription
X-API-Keyrequiredyour_api_key_hereYour APIVerve API key. Found in your dashboard under API Keys.
Acceptoptionalapplication/jsonSpecify response format: application/json (default), application/xml, or application/yaml
User-AgentoptionalMyApp/1.0Identifies your application for analytics and debugging purposes
X-Request-IDoptionalreq_123456789Custom request identifier for tracking and debugging requests
Cache-Controloptionalno-cacheControl caching behavior for the request and response

Learn more about request headers →

GraphQL AccessALPHA

Access Interest Rate through GraphQL to combine it with other API calls in a single request. Query only the interest rate data you need with precise field selection, and orchestrate complex data fetching workflows.

Test Interest Rate in the GraphQL Explorer to confirm availability and experiment with queries.

Credit Cost: Each API called in your GraphQL query consumes its standard credit cost.

GraphQL Endpoint
POST https://api.apiverve.com/v1/graphql
GraphQL Query Example
query {
  interestrate(
    input: {
      country: "US"
    }
  ) {
    country
    countryName
    centralBank
    rate
    date
    lastUpdated
    lastChanged
    change
    changeDirection
    previousRate
  }
}

Note: Authentication is handled via the x-api-key header in your GraphQL request, not as a query parameter.

CORS Support

The Interest Rate API supports Cross-Origin Resource Sharing (CORS) with wildcard configuration, allowing you to call Interest Rate directly from browser-based applications without proxy servers.

CORS HeaderValueDescription
Access-Control-Allow-Origin*Accepts requests from any origin
Access-Control-Allow-Methods*Accepts any HTTP method
Access-Control-Allow-Headers*Accepts any request headers

Browser Usage: You can call Interest Rate directly from JavaScript running in the browser without encountering CORS errors. No proxy server or additional configuration needed.

Learn more about CORS support →

Rate Limiting

Interest Rate API requests are subject to rate limiting based on your subscription plan. These limits ensure fair usage and maintain service quality for all Interest Rate users.

PlanRate LimitDescription
Free5 requests/minHard rate limit enforced - exceeding will return 429 errors
StarterNo LimitProduction ready - standard traffic priority
ProNo LimitProduction ready - preferred traffic priority
MegaNo LimitProduction ready - highest traffic priority

Learn more about rate limiting →

Rate Limit Headers

When rate limits apply, each Interest Rate response includes headers to help you track your usage:

HeaderDescription
X-RateLimit-LimitMaximum number of requests allowed per time window
X-RateLimit-RemainingNumber of requests remaining in the current window
X-RateLimit-ResetUnix timestamp when the rate limit window resets

Handling Rate Limits

Free Plan: When you exceed your rate limit, Interest Rate returns a 429 Too Many Requests status code. Your application should implement appropriate backoff logic to handle this gracefully.

Paid Plans: No rate limiting or throttling applied. All paid plans (Starter, Pro, Mega) are production-ready.

Best Practices for Interest Rate:

  • Monitor the rate limit headers to track your Interest Rate usage (Free plan only)
  • Cache interest rate responses where appropriate to reduce API calls
  • Upgrade to Pro or Mega for guaranteed no-throttle Interest Rate performance

Note: Interest Rate rate limits are separate from credit consumption. You may have credits remaining but still hit rate limits when using Interest Rate on Free tier.

Error Codes

The Interest Rate API uses standard HTTP status codes to indicate success or failure:

CodeMessageDescriptionSolution
200OKRequest successful, data returnedNo action needed - request was successful
400Bad RequestInvalid request parameters or malformed requestCheck required parameters and ensure values match expected formats
401UnauthorizedMissing or invalid API keyInclude x-api-key header with valid API key from dashboard
403ForbiddenAPI key lacks permission or insufficient creditsCheck credit balance in dashboard or upgrade plan
429Too Many RequestsRate limit exceeded (Free: 5 req/min)Implement request throttling or upgrade to paid plan
500Internal Server ErrorServer error occurredRetry request after a few seconds, contact support if persists
503Service UnavailableAPI temporarily unavailableWait and retry, check status page for maintenance updates

Learn more about error handling →

Need help? Contact support with your X-Request-ID for assistance.

Integrate Interest Rate with SDKs

Get started quickly with official Interest Rate SDKs for your preferred language. Each library handles authentication, request formatting, and error handling automatically.

Available for Node.js, Python, C#/.NET, and Android/Java. All SDKs are open source and regularly updated.

Integrate Interest Rate with No-Code API Tools

Connect the Interest Rate API to your favorite automation platform without writing code. Build workflows that leverage interest rate data across thousands of apps.

All platforms use your same API key to access Interest Rate. Visit our integrations hub for step-by-step setup guides.

Frequently Asked Questions

How do I get an API key for Interest Rate?
Sign up for a free account at dashboard.apiverve.com. Your API key will be automatically generated and available in your dashboard. The same key works for Interest Rate and all other APIVerve APIs. The free plan includes 1,000 credits plus a 500 credit bonus.
How many credits does Interest Rate cost?

Each successful Interest Rate API call consumes credits based on plan tier. Check the pricing section above for the exact credit cost. Failed requests and errors don't consume credits, so you only pay for successful interest rate lookups.

Can I use Interest Rate in production?

The free plan is for testing and development only. For production use of Interest Rate, upgrade to a paid plan (Starter, Pro, or Mega) which includes commercial use rights, no attribution requirements, and guaranteed uptime SLAs. All paid plans are production-ready.

Can I use Interest Rate from a browser?
Yes! The Interest Rate API supports CORS with wildcard configuration, so you can call it directly from browser-based JavaScript without needing a proxy server. See the CORS section above for details.
What happens if I exceed my Interest Rate credit limit?

When you reach your monthly credit limit, Interest Rate API requests will return an error until you upgrade your plan or wait for the next billing cycle. You'll receive notifications at 80% and 95% usage to give you time to upgrade if needed.

What's Next?

Continue your journey with these recommended resources

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