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First Curl Request Validating Gcm Api Key

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Currently trying to build my first android app with a GCM API key which will be used by a piece of marketing software to send push notifications. Wanted to get some help validating

Solution 1:

As per my comment, you could try sending a simple downstream message using Postman.

  1. Set request type to POST and provide the URL.

    enter image description here

  2. Set the headers:

    • Authorization = =<Server Key> (here, when you're just starting, it is suggested to proceed with using FCM instead of GCM, since a new valid Server Key can only be generated by creating a Firebase Project).
    • Content-Type = application/json

    enter image description here

  3. Set the (JSON payload) body (as raw):

    {"registration_ids":["ABC"]}

    enter image description here

  4. Click on Send .

You should receive an InvalidRegistration, a 401, or an Invalid Legacy Server Key... error:

  • InvalidRegistration error means the token(s) are invalid, but the Server Key is valid.
  • 401 means invalid credentials, for this particular request, it's the Server Key.

  • Invalid (legacy) Server-key delivered or Sender is not authorized to perform request. means you attempted to use an old format Server Key (like the one in your post). New Server Key's have more characters. Usual response is like this:

    <HTML><HEAD><TITLE>Invalid (legacy) Server-key delivered or Sender is not authorized to perform request.</TITLE></HEAD><BODYBGCOLOR="#FFFFFF"TEXT="#000000"><H1>Invalid (legacy) Server-key delivered or Sender is not authorized to perform request.</H1><H2>Error 401</H2></BODY></HTML>

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