When this matters
Endpoints matter whenever AI gives you a curl command, a fetch example, or docs that say “POST to this URL.” If you hit the wrong endpoint, use the wrong method, or send the wrong payload, nothing good happens.
Small example
One API can expose several endpoints, each with its own job.
GET /api/projects -> list projects
POST /api/projects -> create a project
GET /api/projects/123 -> fetch one projectCommon mistake or lookout
Thinking the base URL is the endpoint. `https://api.stripe.com` is not the same thing as the exact path and method you need for a charge, customer, or webhook operation.
Why this matters for vibe coders
Vibe coders often wire APIs by copying snippets quickly. Knowing what an endpoint is helps you debug whether the problem is the URL, the HTTP method, the headers, or the body instead of just muttering “the API is broken.”