Merge pull request #193 from benjiwheeler/clarify-http-endpoint

clarify that only http vals have and endpoint, and how to find it

src/content/docs/types/http/basic-examples.mdx

@@ -8,7 +8,9 @@ sidebar:
 
 import Val from "@components/Val.astro";
 
-A val that works with the Web API takes a Request object as input and needs to return a Response object.
+HTTP vals, unlike other vals, expose a public endpoint.
+
+An HTTP val that works with the Web API takes a Request object as input and returns a Response object.
 
 The most basic example can ignore the request and just return a response, even using a shorthand method like [Response.json, which is part of the web standard](https://developer.mozilla.org/en-US/docs/Web/API/Response/json_static).
 
@@ -29,4 +31,6 @@ We can grab query parameters using the web standard [URLSearchParams](https://de
 You can also get the body of POST requests using the Request object,
 for example if you had an endpoint that received JSON:
 
-<Val url="https://www.val.town/embed/tmcw/jsonBodyParsing" />
+<Val url="https://www.val.town/embed/tmcw/jsonBodyParsing" />
+
+To obtain the HTTP endpoint for your HTTP val, use the "Copy HTTP endpoint" feature (located in the val's sidebar, or in its ... menu).