FXRateSync API Documentation

Everything you need to integrate real-time currency data into your applications

v1.3.0 Latest•Real-time & Historical Data•99.9% Uptime SLA

Interactive API Testing Get Free API Key

Quick Start

Get up and running in 5 minutes with your first API call

Authentication

Learn how to authenticate and secure your API requests

Tutorials

Step-by-step guides for building currency applications

Framework Guides

React, Vue.js, Angular, and Next.js integration examples

Best Practices

Rate limiting, error handling, and performance optimization

SDKs & Libraries

Official SDKs and community libraries for popular languages

Quick Start Guide

Base URL

https://api.fxratesync.io/v1

Authentication

X-API-Key: your_api_key_here

1. Get API Key

Get Free API Key

2. Make Request

Simple HTTP requests with your API key

curl -H "X-API-Key: key"

3. Get Data

Receive precise currency rates and conversions

{"rate": 0.8817"}

Your First API Call

Request

curl -X GET \
  "https://api.fxratesync.io/v1/convert?from=USD&to=EUR&amount=100" \
  -H "X-API-Key: your_api_key_here"

Response

{
  "from": "USD",
  "to": "EUR",
  "amount": 100.0,
  "converted_amount": 88.17,
  "rate": 0.8817,
  "timestamp": "2024-01-15T12:00:00Z",
  "source": "ecb"
}

Authentication Guide

API Key Authentication

FXRateSync uses API key authentication. Include your API key in the request header:

X-API-Key: your_api_key_here

Security Best Practices

• Never expose your API key in client-side code
• Use environment variables to store API keys
• Rotate keys regularly for enhanced security
• Monitor usage in your dashboard

Rate Limits

Free

1,000 requests/month

10 req/min

Startup

50,000 requests/month

100 req/min

Enterprise

Unlimited requests

Custom limits

Tutorials

Build a Currency Converter

Complete tutorial: Build a professional currency converter app from scratch

Start Tutorial

Rate Limiting Best Practices

Learn how to handle rate limits gracefully and optimize your API usage

Read Guide

Error Handling Guide

Robust error handling strategies for production applications

Learn More

Real-time Streaming

Implement real-time rate updates using Server-Sent Events

Get Started

Troubleshooting

Diagnose common authentication, rate-limit, and validation errors

Open Guide

Framework Integration Guides

React

React hooks and components for currency data

View Guide →

Vue.js

Vue composition API patterns and best practices

View Guide →

Angular

Angular services and reactive patterns

View Guide →

Next.js

SSR, API routes, and server components

View Guide →

SDKs & Libraries

Coming Soon

Official SDKs for popular programming languages are in development

🟦

JavaScript/TypeScript

Node.js and browser SDK

Q1 2024

🐍

Python

Async/await support with type hints

Q1 2024

☕

Java/Kotlin

Spring Boot integration ready

Q2 2024

Best Practices

Performance Optimization

Cache responses when possible to reduce API calls
Use batch endpoints for multiple conversions
Implement exponential backoff for retries
Monitor your usage to optimize costs

Error Handling

Common HTTP Status Codes

200 - Success
400 - Bad Request (invalid parameters)
401 - Unauthorized (invalid API key)
429 - Rate Limited
500 - Server Error

Supported Currencies

FXRateSync currently supports 30+ of the most traded global currencies. We are continuously adding more based on developer demand.

USDEURGBPJPYCADAUDCHFCNYSEKNOKNZDMXN

View full list of 30+ currencies →

Data Sources & Accuracy

How we aggregate rates

Exchange rates are aggregated every minute from multiple premium providers, including central bank reference feeds and top-tier institutional liquidity venues. A weighted algorithm removes outliers and selects the most reliable midpoint price.

European Central Bank reference rates
Tier-1 bank liquidity pools
FX spot exchanges & electronic trading venues
Fallback to last-known tick ensuring 99.9% uptime

Ready to Get Started?

Join thousands of developers already building with FXRateSync

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