finance
Frankfurter
Free open-source API for foreign exchange reference rates published by the ECB.
How an assistant reaches it
| Access | Where | Checked |
|---|---|---|
| MCP server | frankfurter.dev/mcp/ | Stated on frankfurter.dev/ |
| Public API | frankfurter.dev/ | HTTP 200 · 2026-10-04 |
| OpenAPI description | api.frankfurter.dev/v2/openapi.json | Stated on frankfurter.dev/ |
| llms.txt | frankfurter.dev/llms.txt | HTTP 200 · 2026-10-04 |
What Frankfurter's access means for an assistant
MCP server. A Model Context Protocol server: a standard interface that AI assistants such as Claude, ChatGPT and others can connect to, to call the service's tools directly. Frankfurter states it on its own pages; the file itself was not checked.
Public API. A documented public API an agent can call, usually with a key from the service. Frankfurter's answered HTTP 200 when checked.
OpenAPI description. A published machine-readable API description that an agent can read to learn how to call the service. Frankfurter states it on its own pages; the file itself was not checked.
llms.txt. A plain-text guide at /llms.txt that tells AI systems what the site is and where its key pages are. Frankfurter's answered HTTP 200 when checked.
To use Frankfurter from an assistant, connect it where the assistant offers connections (an MCP server, an app or a connector), or point an agent at the published file or API above. What the service returns, and on what terms, is set by Frankfurter.
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