title: Cannot access API explorer on localhost
body: <p>I'm trying to build an Endpoints application, but am new to Google App Engine.</p>
  
  <p>As I understand it, there's some kind of API Explorer included in the SDK that should let me test/verify my API -- the docs say: "Test the API backend in the Google APIs Explorer by navigating to <code>http://localhost:8080/_ah/api/explorer</code>".  But I can't find any documentation of what API Explorer actually is, does, or looks like.  </p>
  
  <p>In any case, when I try to hit that URL, I get immediately redirected to <a href="https://developers.google.com/apis-explorer/?base=http://localhost:8080/_ah/api#p/" rel="noreferrer">https://developers.google.com/apis-explorer/?base=http://localhost:8080/_ah/api#p/</a>, which tells me nothing useful, and seems like it must be an error of some kind.</p>
  
  <p>The devappserver logs say:</p>
  
  <pre><code>INFO     2013-07-17 17:27:54,574 server.py:593] default: "GET /_ah/api/explorer HTTP/1.1" 302 -
  INFO     2013-07-17 17:27:56,099 server.py:593] default: "GET /_ah/api/static/proxy.html?jsh=m%3B%2F_%2Fscs%2Fapps-static%2F_%2Fjs%2Fk%3Doz.gapi.en.7JUwNUXMAS8.O%2Fm%3D__features__%2Fam%3DEQ%2Frt%3Dj%2Fd%3D1%2Frs%3DAItRSTO0dpKS_pssf5r3z87E6FlFvDGdOg HTTP/1.1" 200 1933
  INFO     2013-07-17 17:27:56,193 server.py:593] default: "POST /_ah/spi/BackendService.getApiConfigs HTTP/1.1" 200 2342
  INFO     2013-07-17 17:27:56,492 server.py:593] default: "GET /_ah/api/discovery/v1/apis HTTP/1.1" 200 576
  INFO     2013-07-17 17:27:56,507 server.py:593] default: "POST /_ah/spi/BackendService.getApiConfigs HTTP/1.1" 200 2342
  INFO     2013-07-17 17:27:56,583 server.py:593] default: "POST /_ah/spi/BackendService.getApiConfigs HTTP/1.1" 200 2342
  INFO     2013-07-17 17:27:56,811 server.py:593] default: "GET /_ah/api/discovery/v1/apis HTTP/1.1" 200 576
  INFO     2013-07-17 17:27:56,886 server.py:593] default: "GET /_ah/api/discovery/v1/apis/scrnxSync/v1/rest HTTP/1.1" 200 3365
  </code></pre>
  
  <p>for whatever that's worth.</p>
  
  <p>Here's my app.yaml:</p>
  
  <pre><code>application: scrnx-cloud-1
  version: 1
  runtime: python27
  api_version: 1
  threadsafe: true
  
  handlers:
  - url: /admin/.*
    script: admin.application
    login: admin
    secure: always
  
    # Endpoints handler
  - url: /_ah/spi/.*
    script: sync_api.application
  
    # catchall - must come last    
  - url: /.*
    script: default.application
  
  
  admin_console:
    pages:
    - name: View Measurement
      url: /admin/measurement  
  
  
  libraries:
  - name: jinja2
    version: 2.6
  - name: markupsafe
    version: 0.15
  
  builtins:
  - admin_redirect: off
  - appstats: off
  - deferred: off
  - remote_api: on
  </code></pre>
  
  <p>Is there something else I'm supposed to be doing to set this up?  </p>