MarathonBooksMarathonBooks™
HomeDevelopersSign in

Blog

Thinking on intent-driven APIs, agentic systems, and building financial infrastructure.

March 20, 2026

What If APIs Didn't Require Structure — Just Intent?

Most APIs require you to learn the domain before you can integrate. We built one that accepts plain text or JSON — and figures out the accounting automatically.

March 19, 2026

Agentic Accounting Is Already Here

What happens when AI doesn't just assist with bookkeeping — but actually runs it? We built a system where your books update themselves and you just check in.

MarathonBooks™

Your books run automatically. Check in anytime.

Product

How it worksFeaturesQuickCapture™DevelopersBlog

Industries

ContractorsLandscapersCleaning BusinessesFood TrucksFreelancers

Legal

Privacy PolicyTerms of Service

© 2026 MarathonBooks™. Built for small business owners.