# Currency Exchange Rate API > USD-based exchange rates for about 160 currencies through a metered JSON API, with daily historical rates back to 1999. Any currency can be the base, and the same edition backs webhooks and a WebSocket stream. Current rates come from the newest edition for the key’s plan, and each plan sets how often that edition can change and how far back historical rates reach. - About 160 currencies, quoted per 1 USD and available against any base currency in the edition. - JSON REST API: `GET /latest` for rates, `GET /convert` for an amount, `GET /historical` for one past day, and `GET /timeseries` for up to 366 days. All need a bearer API key and count against a monthly quota. - Daily historical rates back to 4 January 1999 for the currencies the European Central Bank publishes, and every currency for days recorded since launch. The free plan reaches back 30 days; Starter, Pro, and Business reach the full archive. - `GET /currencies` and `GET /preview` are public and not metered. - On paid plans, signed webhooks and a WebSocket stream push each new edition: Starter 1 webhook and 1 connection, Pro 3 and 3, Business 5 and 5. The free plan has neither. - A free plan with no credit card. Paid plans update up to every 5 minutes. - A remote MCP server (Streamable HTTP) at https://api.currencyexchangerate-api.com/api/v1/mcp lets AI assistants call the same data as tools: get_latest_rates, convert_currency, get_historical_rates, get_rates_timeseries, and list_currencies. Auth is the same bearer key, and the metered tools count one request each. - Mid-market reference rates compiled from multiple central-bank and commercial sources, for pricing, invoicing, reporting, and display. Not suitable for trading or executing forex transactions. Every public page has a Markdown version at its `.md` URL (the home page is /index.md), also served to requests that send `Accept: text/markdown`. ## Docs - [API documentation](https://currencyexchangerate-api.com/docs.md): authentication, quotas, endpoints, errors, webhooks, and streaming - [MCP server](https://currencyexchangerate-api.com/docs/mcp.md): connect Claude Code, Cursor, VS Code, or Windsurf to live and historical exchange rates - [Full API reference](https://currencyexchangerate-api.com/llms-full.txt): every endpoint, parameter, and example in one Markdown file - [OpenAPI 3.1 description](https://currencyexchangerate-api.com/openapi.json): the REST endpoints and webhooks, machine-readable - [Postman collection](https://currencyexchangerate-api.com/postman-collection.json): every endpoint ready to run in Postman - [Overview, plans, and quick start](https://currencyexchangerate-api.com/index.md) ## Integration guides - [JavaScript and Node.js](https://currencyexchangerate-api.com/guides/javascript.md) - [TypeScript](https://currencyexchangerate-api.com/guides/typescript.md) - [Next.js App Router](https://currencyexchangerate-api.com/guides/nextjs.md) - [React](https://currencyexchangerate-api.com/guides/react.md) - [Express.js](https://currencyexchangerate-api.com/guides/express.md) - [Python](https://currencyexchangerate-api.com/guides/python.md) - [Django](https://currencyexchangerate-api.com/guides/django.md) - [Flask](https://currencyexchangerate-api.com/guides/flask.md) - [FastAPI](https://currencyexchangerate-api.com/guides/fastapi.md) - [PHP](https://currencyexchangerate-api.com/guides/php.md) - [Laravel](https://currencyexchangerate-api.com/guides/laravel.md) - [Ruby on Rails](https://currencyexchangerate-api.com/guides/ruby-on-rails.md) - [Go](https://currencyexchangerate-api.com/guides/go.md) - [Java 17](https://currencyexchangerate-api.com/guides/java.md) - [C# and .NET 8](https://currencyexchangerate-api.com/guides/csharp.md) - [Google Sheets](https://currencyexchangerate-api.com/guides/google-sheets.md) ## Currencies - [All currencies and exchange rates](https://currencyexchangerate-api.com/currencies.md): every code, name, symbol, and rate per 1 USD - [USD to EUR exchange rate](https://currencyexchangerate-api.com/convert/usd-to-eur.md) - [EUR to USD exchange rate](https://currencyexchangerate-api.com/convert/eur-to-usd.md) - [USD to GBP exchange rate](https://currencyexchangerate-api.com/convert/usd-to-gbp.md) - [GBP to USD exchange rate](https://currencyexchangerate-api.com/convert/gbp-to-usd.md) - [EUR to GBP exchange rate](https://currencyexchangerate-api.com/convert/eur-to-gbp.md) - [USD to JPY exchange rate](https://currencyexchangerate-api.com/convert/usd-to-jpy.md) - [USD to INR exchange rate](https://currencyexchangerate-api.com/convert/usd-to-inr.md) - [USD to CNY exchange rate](https://currencyexchangerate-api.com/convert/usd-to-cny.md) - [USD to CAD exchange rate](https://currencyexchangerate-api.com/convert/usd-to-cad.md) - [USD to AUD exchange rate](https://currencyexchangerate-api.com/convert/usd-to-aud.md) - [USD to EGP exchange rate](https://currencyexchangerate-api.com/convert/usd-to-egp.md) - [USD to AED exchange rate](https://currencyexchangerate-api.com/convert/usd-to-aed.md) - Any other pair: https://currencyexchangerate-api.com/convert/{from}-to-{to}.md with lowercase ISO 4217 codes, such as https://currencyexchangerate-api.com/convert/gbp-to-inr.md ## Optional - [Pricing and plans](https://currencyexchangerate-api.com/#pricing) - [Open Exchange Rates alternative](https://currencyexchangerate-api.com/alternatives/open-exchange-rates): side-by-side comparison and switching guide - [ExchangeRate-API alternative](https://currencyexchangerate-api.com/alternatives/exchangerate-api): side-by-side comparison and switching guide - [API catalog (RFC 9727)](https://currencyexchangerate-api.com/.well-known/api-catalog) - [MCP server card](https://currencyexchangerate-api.com/.well-known/mcp/server-card.json) - [Terms of Service](https://currencyexchangerate-api.com/terms) - [Privacy Policy](https://currencyexchangerate-api.com/privacy)