Preview post per platform

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Path parameters

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Behaviour

• The post must belong to the caller’s current workspace; otherwise the response is 404.
• Returns the original content alongside per-platform sanitized versions and length statistics.
• original_content is the plain text stored on the post (the editor saves plain text, not HTML).
• sanitized_content is the platform-specific rendering of that text. For most platforms this is identical to the original. Exceptions:
  • LinkedIn / LinkedIn Page — Unicode bold/underline substitution if the source contained <strong>/<b>/<u> markers (used by the AI generator).
  • Mastodon — a small allow-list of inline HTML is preserved (p, strong, em, a, br, span).
  • Telegram — rendered as Telegram’s HTML allow-list (b, i, u, s, a, code, pre); block elements become line breaks and @mentions are kept.
• truncated is true only when sanitization actually shortened the byte count (e.g. an HTML entity got decoded). It is not a hard-cap signal — over-length content is rejected at publish time, never silently truncated. To detect over-limit content, compare sanitized_length against max_content_length yourself.

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Response

{
  "post_id": "9f1a2b3c-4d5e-6f7a-8b9c-0d1e2f3a4b5c",
  "original_content": "Launch day!\n\nExcited to share what we built.",
  "original_length": 44,
  "platforms": [
    {
      "post_platform_id": "a1b2c3d4-e5f6-7a8b-9c0d-1e2f3a4b5c6d",
      "platform": "x",
      "content_type": "x_post",
      "sanitized_content": "Launch day!\n\nExcited to share what we built.",
      "sanitized_length": 44,
      "max_content_length": 280,
      "truncated": false
    },
    {
      "post_platform_id": "b2c3d4e5-f6a7-8b9c-0d1e-2f3a4b5c6d7e",
      "platform": "linkedin",
      "content_type": "linkedin_post",
      "sanitized_content": "Launch day!\n\nExcited to share what we built.",
      "sanitized_length": 44,
      "max_content_length": 3000,
      "truncated": false
    }
  ]
}

curl https://app.trypost.it/api/posts/9f1a2b3c-4d5e-6f7a-8b9c-0d1e2f3a4b5c/preview \
  -H "Authorization: Bearer YOUR_API_KEY"