How to validate an API idea before building it
A developer asked the microsaas community how to check if their API idea has real demand before spending months building it. This is a common challenge for solo founders who want to avoid wasting effort on something nobody needs. The thread surfaces practical, low-cost ways to test an idea early.
Before writing a single line of code, solo founders benefit from confirming that real people would actually pay for what they plan to build. This process is called validation — and skipping it is one of the most common reasons small products fail.
The r/microsaas community is a go-to place for early-stage indie builders to swap advice. Common validation approaches discussed include reaching out directly to potential customers, setting up a simple landing page to collect sign-ups, or running a 'fake door' test — presenting the offer as if it exists and measuring interest before building anything real.
Key points
- Talk to potential customers directly before writing any code — even a few conversations reveal if the problem is real
- A simple landing page with a sign-up form lets you measure interest with hard numbers
- A 'fake door' test means acting as if the product exists to see if people bite — before building it
- Communities like r/microsaas give fast, honest feedback on early-stage ideas
- Validating early saves months of work on something the market doesn't want
Quick term guide
- microsaas
- A small software service built and run by one person or a tiny team, focused on solving a very specific problem
- solo founder
- A single person who builds and runs a product or business without co-founders
- founders
- People who are starting or running their own business or project.
- founder
- A person who starts a new company or project.
- surface
- Here it means a distinct channel or interface where users encounter information, such as a search results page or an AI chat answer.
- validation
- Checking whether real people understand, want, or would use an idea before spending more time on it.
- landing page
- The first page a visitor sees after clicking an ad, link, or campaign message.
- feedback
- A response that tells a user what they did well or should fix.