FX Conversion Endpoint

The FX conversion endpoint is the fastest path from one currency amount to another. It is a strong fit when product code needs a direct converted value instead of a full table of rates.

Key points

Designed for direct amount conversion workflows.
Works well in pricing previews, billing estimates, quoting, and checkout support flows.
Conversion responses are intentionally compact so they can be passed straight into product logic.

Common errors

400 from and to are required
400 rate not found
401 invalid_key
429 rate_limited

Reference details

Parameters, response shape, and operational notes

Parameter notes

from and to are the required currency parameters.
amount should be preserved with the returned rate so later calculations remain auditable.
This endpoint is most useful when you need a direct answer rather than a broader rates table.

Response highlights

Look for from, to, amount, rate, result, and date in the response.
The rate is often worth storing alongside the result so downstream systems can explain how the conversion happened.
This endpoint is different from latest-rates fetches because the output is already shaped for a single conversion task.

Operational notes

Keep user-facing pricing logic and operator-facing reporting logic separate if they use the same FX input layer.
Validate supported currencies before exposing the conversion flow to customers.
Use current-rate and historical endpoints alongside conversion only when your workflow actually needs both.

Implementation checklist

Start with a one-amount conversion request to confirm the response shape.
Decide whether the result is transient UI data or something that must be stored for auditing or invoices.
Add input validation around currency symbols and decimal handling before pushing the endpoint into production checkout flows.

Code examples

Visible integration examples

curl

curl -s -H "x-api-key: YOUR_API_KEY" "https://novadatahub.com/api/fx/convert?from=USD&to=INR&amount=100"

Python

import requests
resp = requests.get('https://novadatahub.com/api/fx/convert', params={'from': 'USD', 'to': 'INR', 'amount': 100}, headers={'x-api-key': 'YOUR_API_KEY'}, timeout=60)
print(resp.json())

C# HttpClient

using System.Net.Http.Json;
using System.Text.Json;
using var http = new HttpClient();
http.DefaultRequestHeaders.Add("x-api-key", "YOUR_API_KEY");
var json = await http.GetFromJsonAsync<JsonElement>("https://novadatahub.com/api/fx/convert?from=USD&to=INR&amount=100");
Console.WriteLine(json.ToString());

Sample JSON response

{
  "ok": true,
  "from": "USD",
  "to": "INR",
  "amount": 100,
  "rate": 83.21,
  "result": 8321.0,
  "date": "2026-05-11"
}

Related resources

Move from reference docs into the next relevant workflow

Currency Exchange API landing page

Open the main FX overview page for current rates, conversion, and historical data use cases.

Open landing page

Multi-currency checkout guide

Read the implementation guide for base-currency design, fallbacks, and pricing consistency across surfaces.

Open guide

Historical FX reporting tutorial

Follow a practical workflow for date-range retrieval, normalization, and reporting-ready storage.

Open tutorial

FX comparison page

See what product and finance teams should evaluate when choosing an FX API for pricing and reporting.

Open comparison

Create account View pricing Currency Exchange API page

Continue with connected pages

Currency Exchange API

Open the related NovaDataHub page for deeper documentation, comparisons, or implementation guidance.

Open page

Multi-currency checkout guide

Open the related NovaDataHub page for deeper documentation, comparisons, or implementation guidance.

Open page

Currency conversion solution

Open the related NovaDataHub page for deeper documentation, comparisons, or implementation guidance.

Open page

FX docs hub

Open the related NovaDataHub page for deeper documentation, comparisons, or implementation guidance.

Open page