The Fixer API is a reliable, lightweight REST API for real-time and historical foreign exchange rates and currency conversion. It delivers JSON-formatted data for over 170 world currencies, aggregated from 15+ trusted financial sources and updated regularly for accuracy. The API provides multiple endpoints to cover different use cases, including retrieving the latest rates, historical data, currency conversion, time-series analysis, and daily fluctuation information.

This documentation guides you through the API structure, available methods, error handling, and code examples. If any questions remain, our support team is ready to assist and ensure a smooth integration experience.

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API Endpoint Summary

The Fixer API provides a set of RESTful endpoints to access foreign exchange rates, currency conversion, historical data, and market insights. All responses are returned in JSON format over HTTPS and require an API access key.

Here’s a Fixer API endpoint summary in a table format for easy reference:

Endpoint	Method	Description	Query Parameters / Notes
`/symbols`	GET	Retrieve a list of all available currency codes and names.	`access_key` (required)
`/latest`	GET	Get the most recent exchange rates for all or selected currencies.	`access_key`, `base` (optional), `symbols` (optional)
`/{date}`	GET	Get historical exchange rates for a specific date (`YYYY-MM-DD`).	`access_key`, `base` (optional), `symbols` (optional)
`/convert`	GET	Convert an amount from one currency to another; supports historical conversion.	`access_key`, `from`, `to`, `amount`, `date` (optional)
`/timeseries`	GET	Get exchange rate data between two dates for all or selected currencies.	`access_key`, `start_date`, `end_date`, `base`, `symbols`
`/fluctuation`	GET	Retrieve currency fluctuation data between two dates.	`access_key`, `start_date`, `end_date`, `base`, `symbols`

All endpoints return JSON-formatted responses and require an API key passed via the access_key parameter. Parameters like base and symbols help filter and customize the response.

Why Choose Fixer?

Fixer is built for developers and businesses that need dependable currency data with minimal overhead:

Real-Time Exchange Rates — Access up-to-date exchange rate information for 170+ currencies.
Wide Range of Features — Includes endpoints for latest rates, historical data, currency conversion, time-series, and fluctuation data.
Easy Integration — Simple JSON API that works with any programming language or platform.
High-Quality Data — Sourced from trusted financial institutions and aggregated for accuracy and reliability.
Secure — SSL encryption (256-bit) on all plans ensures secure communication.
Scalable for Projects of All Sizes — Suitable for hobby projects on a free tier or large enterprise systems with frequent updates and higher limits.

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