Get Paginated Posts

curl -X POST 'https://api.buffer.com' \
  -H 'Content-Type: application/json' \
  -H 'Authorization: Bearer YOUR_API_KEY' \
  -d '{"query": "query GetPosts {\n  posts(\n    after: \"id_to_start_after\",\n    first: 20,\n    input: {organizationId: \"some_organization_id\", filter: {status: [sent], channelIds: [\"some_channel_id\"]}}\n  ) {\n    pageInfo {\n      startCursor\n      endCursor\n      hasNextPage\n    }\n    edges {\n      node {\n        id\n        text\n        createdAt\n        channelId\n      }\n    }\n  }\n}"}'

const response = await fetch('https://api.buffer.com', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
    'Authorization': 'Bearer YOUR_API_KEY',
  },
  body: JSON.stringify({
    query: `
    query GetPosts {
      posts(
        after: "id_to_start_after",
        first: 20,
        input: {organizationId: "some_organization_id", filter: {status: [sent], channelIds: ["some_channel_id"]}}
      ) {
        pageInfo {
          startCursor
          endCursor
          hasNextPage
        }
        edges {
          node {
            id
            text
            createdAt
            channelId
          }
        }
      }
    }
    `,
  }),
});

const data = await response.json();
console.log(data);

<?php

$query = '
query GetPosts {
  posts(
    after: "id_to_start_after",
    first: 20,
    input: {organizationId: "some_organization_id", filter: {status: [sent], channelIds: ["some_channel_id"]}}
  ) {
    pageInfo {
      startCursor
      endCursor
      hasNextPage
    }
    edges {
      node {
        id
        text
        createdAt
        channelId
      }
    }
  }
}
';

$payload = [
    'query' => $query,
];

$ch = curl_init('https://api.buffer.com');
curl_setopt_array($ch, [
    CURLOPT_POST => true,
    CURLOPT_HTTPHEADER => [
        'Content-Type: application/json',
        'Authorization: Bearer YOUR_API_KEY',
    ],
    CURLOPT_POSTFIELDS => json_encode($payload),
    CURLOPT_RETURNTRANSFER => true,
]);

$response = curl_exec($ch);
curl_close($ch);

$data = json_decode($response, true);
print_r($data);