Frankfurter Plans Pricing
Frankfurter is a fully free, MIT-licensed open-source currency exchange API. The hosted public endpoint at api.frankfurter.dev requires no API key, no account, and has no monthly or daily caps. There are no tiers and no paid upgrades. The same code is distributable as a Docker image (lineofflight/frankfurter) for unlimited self-hosting at zero license cost; the only costs for a self-hosted deployment are infrastructure (compute, storage) and the operator's own time to register the optional, free upstream provider keys (Bank Al-Maghrib, Banco de México, Banco Central de Chile, Bank of Thailand, US Federal Reserve, Turkish Central Bank).
Frankfurter Plans Pricing is the machine-readable pricing-plan profile for Frankfurter on the APIs.io network, conforming to the API Commons Plans specification.
It defines 2 plans, covering freemium and subscription tiers, with named plans including Public Hosted (Free), Self-Hosted (FOSS).
Tagged areas include Currency Exchange, Open Source, Free, Self-Hosted, and MIT License.
Plans
The public api.frankfurter.dev endpoint. No registration, no API key, no monthly or daily caps. Soft fair-use rate-limiting applies to protect the shared instance from abuse.
- Latest blended rates across 50+ central banks
- Historical rates back to 1948
- Time-series queries with optional week/month downsampling
- 201 currencies
- JSON, NDJSON, and CSV output formats
- Open CORS for browser access
Run your own Frankfurter instance from the public Docker image. MIT license — no license fee, no per-call charge, no telemetry. You pay only for the infrastructure you provision and the optional provider API keys you choose to register (all of which are themselves free).
- Full OpenAPI v1 and v2 endpoint surface
- SQLite storage with optional persistent volume
- Docker image at lineofflight/frankfurter
- Optional provider keys for Bank Al-Maghrib, Banco de México, Banco Central de Chile, Bank of Thailand, US Federal Reserve, Turkish Central Bank
- Full source code on GitHub under MIT
Sources
- https://frankfurter.dev
- https://frankfurter.dev/docs
- https://github.com/lineofflight/frankfurter
- https://github.com/lineofflight/frankfurter/blob/main/LICENSE
Work with this as data
Every plan here is available over the APIs.io API and to AI agents over MCP.
MCP server
One button, every client — Claude, Cursor, VS Code and the rest.
https://apis.io/mcp
Tools for plans
4 MCP tools reach this
find_plansBrowse and filter every plan in the catalog.apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.resolveTurn a domain, URL or GitHub org into the provider it belongs to.find_cohortsEvery scored population of providers in the catalog.
Call it yourself
curl for this page
curl "https://apis.io/api/v1/plans/frankfurter-plans-pricing"curl "https://apis.io/api/v1/plans?limit=25"Discovery needs no key. Ratings and market analysis are Pro.