Building a Mortgage Agent With FRED Data, FastAPI, and LLM Tool Calling
If you have ever tried to build a “mortgage rates today” feature, you have probably landed on the same fork in the road I did. Consumer finance sites publish attractive numbers, but those pages are editorial HTML, not APIs. Layout changes break scrapers, terms of use are unclear, and it is hard to explain what statistic you are actually showing. For a developer project meant to be forked on GitHub, that path is a dead end. I wanted something smaller and more honest: national 30-year and 15-year
