List Channels

GET https://api.thingspeak.com/channels/public.json

{
  "pagination":
  {
    "current_page": 1,
    "per_page": 15,
    "total_entries": 653
  },
  "channels":
  [
    {
      "id": 9,
      "name": "my_house",
      "description": "Netduino Plus connected to sensors around the house",
      "latitude": "40.44",
      "longitude": "-79.996",
      "created_at": "2010-12-13T20:20:06-05:00",
      "elevation": "",
      "last_entry_id": 6062691,
      "ranking" :100,
      "username":"iothans",
      "tags":
      [
        {
          "id": 9,
          "name": "temp"
        },{
          "id": 25,
          "name": "light"
        }
      ]
    },
    {
      "id": 5683,
      "name": "Residential Data Points",
      "description": "Arduino Uno + Ethernet Shield",
      "latitude": "35.664548",
      "longitude": "-78.654972",
      "created_at": "2013-05-15T12:33:57-04:00",
      "elevation": "100",
      "last_entry_id": 731713,
      "ranking": 100,
      "username": "samlro",
      "tags":
      [
        {
          "id": 950,
          "name": "Analog Inputs"
        }
      ]
    }
  ]
}

GET https://api.thingspeak.com/channels/public.xml

<?xml version="1.0" encoding="UTF-8"?>
<response>
  <pagination>
    <current-page type="WillPaginate::PageNumber">1</current-page>
    <per-page type="integer">15</per-page>
    <total-entries type="integer">654</total-entries>
  </pagination>
  <channels type="array">
    <channel>
      <id type="integer">9</id>
      <name>my_house</name>
      <description>
      Netduino Plus connected to sensors around the house
      </description>
      <latitude type="decimal">40.44</latitude>
      <longitude type="decimal">-79.996</longitude>
      <created-at type="dateTime">2010-12-13T20:20:06-05:00</created-at>
      <elevation/>
      <last-entry-id type="integer">6062720</last-entry-id>
      <ranking type="integer">100</ranking>
      <username>iothans</username>
      <tags type="array">
        <tag>
          <id type="integer">9</id>
          <name>temp</name>
        </tag>
        <tag>
          <id type="integer">25</id>
          <name>light</name>
        </tag>
      </tags>
    </channel>
    <channel>
      <id type="integer">5683</id>
      <name>Residential Data Points</name>
      <description>Arduino Uno + Ethernet Shield</description>
      <latitude type="decimal">35.664548</latitude>
      <longitude type="decimal">-78.654972</longitude>
      <created-at type="dateTime">2013-05-15T12:33:57-04:00</created-at>
      <elevation>100</elevation>
      <last-entry-id type="integer">731720</last-entry-id>
      <ranking type="integer">100</ranking>
      <username>samlro</username>
      <tags type="array">
        <tag>
          <id type="integer">950</id>
          <name>Analog Inputs</name>
        </tag>
      </tags>
    </channel>
  </channels>
</response>