Platform-specific fields, geo-restriction, polls, and media URL requirements

Platform-Specific Fields

All fields go inside platformSpecificData on the Twitter platform entry.

Field	Type	Description
`replyToTweetId`	string	ID of an existing tweet to reply to. The published tweet will appear as a reply in that tweet's thread. For threads, only the first tweet replies to the target; subsequent tweets chain normally.
`quoteTweetId`	string	ID (or full status URL) of an existing tweet to quote-repost. Mutually exclusive with media and poll. For threads, applies to the first tweet only.
`replySettings`	"following" \| "mentionedUsers" \| "subscribers" \| "verified"	Controls who can reply to the tweet. Omit for default (everyone can reply). For threads, applies to the first tweet only. Cannot be combined with `replyToTweetId`.
`threadItems`	Array<{content, mediaItems?}>	Complete sequence of tweets in a thread. The first item becomes the root tweet and must be provided as `threadItems[0]`. When `threadItems` is provided, top-level `content` is for display/search only and is NOT published.
`poll`	object	Create a poll with this tweet. Mutually exclusive with media attachments and threads.
`poll.options`	string[]	Poll options (2-4 choices, max 25 characters each).
`poll.duration_minutes`	number	Poll duration in minutes (5 min to 7 days).
`longVideo`	boolean	Enable long video uploads (over 140 seconds) using amplify_video. Requires X Premium; may require allowlisting.
`geoRestriction`	object	Restrict media visibility to specific countries. Only applies when media is attached (ignored for text-only tweets). `geoRestriction.countries`: array of uppercase ISO 3166-1 alpha-2 codes, max 25. The media is hidden outside the listed countries; the tweet text remains visible globally.
`paidPartnership`	boolean	When true, label the post as a paid partnership / paid promotion. For threads, applies to the root tweet only. Field availability may depend on your X API access tier.
`madeWithAi`	boolean	When true, label the post as containing AI-generated media (not AI-written text). For threads, applies to the root tweet only.
`sensitiveMedia`	object	Marks attached media with a sensitive-content warning (requires media; ignored for text-only tweets). At least one flag must be true.
`sensitiveMedia.adultContent`	boolean	Content contains adult material.
`sensitiveMedia.graphicViolence`	boolean	Content depicts graphic violence.
`sensitiveMedia.other`	boolean	Content has other sensitive characteristics.

Restrict who can see your tweet's media by country. This applies at the media level: the media is hidden for users outside the specified countries, but the tweet text remains visible globally. Requires media to be attached.

{
  "platforms": [{
    "platform": "twitter",
    "accountId": "YOUR_ACCOUNT_ID",
    "platformSpecificData": {
      "geoRestriction": {
        "countries": ["US", "ES"]
      }
    }
  }],
  "mediaItems": [{"type": "image", "url": "https://example.com/photo.jpg"}]
}

Paid partnership, AI labels, and sensitive media

Zernio supports additional X labels via platformSpecificData.

Note: paidPartnership and madeWithAi apply to the root tweet only (for threads).

Paid partnership label

Set platformSpecificData.paidPartnership: true to label the post as a paid partnership / paid promotion.

Note: Field availability may depend on your X API access tier.

curl -X POST https://zernio.com/api/v1/posts \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "content": "Sponsored: our new feature is live",
    "platforms": [{
      "platform": "twitter",
      "accountId": "YOUR_ACCOUNT_ID",
      "platformSpecificData": {
        "paidPartnership": true
      }
    }],
    "publishNow": true
  }'

AI-generated media label

Set platformSpecificData.madeWithAi: true to label the post as containing AI-generated media.

Note: Per X, this label is for AI-generated media, not AI-written text.

curl -X POST https://zernio.com/api/v1/posts \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "content": "AI-generated image (labeled)",
    "mediaItems": [
      {"type": "image", "url": "https://cdn.example.com/ai-image.jpg"}
    ],
    "platforms": [{
      "platform": "twitter",
      "accountId": "YOUR_ACCOUNT_ID",
      "platformSpecificData": {
        "madeWithAi": true
      }
    }],
    "publishNow": true
  }'

Sensitive media warning

Use platformSpecificData.sensitiveMedia to mark attached media with a sensitive-content warning.

Note: Requires media (ignored for text-only tweets). At least one flag must be true.

curl -X POST https://zernio.com/api/v1/posts \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "content": "Sensitive media example",
    "mediaItems": [
      {"type": "image", "url": "https://cdn.example.com/photo.jpg"}
    ],
    "platforms": [{
      "platform": "twitter",
      "accountId": "YOUR_ACCOUNT_ID",
      "platformSpecificData": {
        "sensitiveMedia": {
          "adultContent": true,
          "graphicViolence": false,
          "other": false
        }
      }
    }],
    "publishNow": true
  }'

Polls

Create an X (Twitter) poll by providing platformSpecificData.poll.

Note: Polls are mutually exclusive with mediaItems and platformSpecificData.threadItems.

curl -X POST https://zernio.com/api/v1/posts \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "content": "Which feature should we ship next?",
    "platforms": [{
      "platform": "twitter",
      "accountId": "YOUR_ACCOUNT_ID",
      "platformSpecificData": {
        "poll": {
          "options": ["Dark mode", "New analytics", "More integrations"],
          "duration_minutes": 1440
        }
      }
    }],
    "publishNow": true
  }'

Media URL Requirements

These do not work as media URLs:

Google Drive -- returns an HTML download page, not the file
Dropbox -- returns an HTML preview page
OneDrive / SharePoint -- returns HTML
iCloud -- returns HTML

Test your URL in an incognito browser window. If you see a webpage instead of the raw image or video, it will not work.

Media URLs must be:

Publicly accessible (no authentication required)
Returning actual media bytes with the correct Content-Type header
Not behind redirects that resolve to HTML pages
Hosted on a fast, reliable CDN

Supabase URLs: Zernio auto-proxies Supabase storage URLs, so they work without additional configuration.

Platform-Specific Fields

All fields go inside platformSpecificData on the Twitter platform entry.

Field	Type	Description
`replyToTweetId`	string	ID of an existing tweet to reply to. The published tweet will appear as a reply in that tweet's thread. For threads, only the first tweet replies to the target; subsequent tweets chain normally.
`quoteTweetId`	string	ID (or full status URL) of an existing tweet to quote-repost. Mutually exclusive with media and poll. For threads, applies to the first tweet only.
`replySettings`	"following" \| "mentionedUsers" \| "subscribers" \| "verified"	Controls who can reply to the tweet. Omit for default (everyone can reply). For threads, applies to the first tweet only. Cannot be combined with `replyToTweetId`.
`threadItems`	Array<{content, mediaItems?}>	Complete sequence of tweets in a thread. The first item becomes the root tweet and must be provided as `threadItems[0]`. When `threadItems` is provided, top-level `content` is for display/search only and is NOT published.
`poll`	object	Create a poll with this tweet. Mutually exclusive with media attachments and threads.
`poll.options`	string[]	Poll options (2-4 choices, max 25 characters each).
`poll.duration_minutes`	number	Poll duration in minutes (5 min to 7 days).
`longVideo`	boolean	Enable long video uploads (over 140 seconds) using amplify_video. Requires X Premium; may require allowlisting.
`geoRestriction`	object	Restrict media visibility to specific countries. Only applies when media is attached (ignored for text-only tweets). `geoRestriction.countries`: array of uppercase ISO 3166-1 alpha-2 codes, max 25. The media is hidden outside the listed countries; the tweet text remains visible globally.
`paidPartnership`	boolean	When true, label the post as a paid partnership / paid promotion. For threads, applies to the root tweet only. Field availability may depend on your X API access tier.
`madeWithAi`	boolean	When true, label the post as containing AI-generated media (not AI-written text). For threads, applies to the root tweet only.
`sensitiveMedia`	object	Marks attached media with a sensitive-content warning (requires media; ignored for text-only tweets). At least one flag must be true.
`sensitiveMedia.adultContent`	boolean	Content contains adult material.
`sensitiveMedia.graphicViolence`	boolean	Content depicts graphic violence.
`sensitiveMedia.other`	boolean	Content has other sensitive characteristics.

Geo-Restriction

{
  "platforms": [{
    "platform": "twitter",
    "accountId": "YOUR_ACCOUNT_ID",
    "platformSpecificData": {
      "geoRestriction": {
        "countries": ["US", "ES"]
      }
    }
  }],
  "mediaItems": [{"type": "image", "url": "https://example.com/photo.jpg"}]
}

Paid partnership, AI labels, and sensitive media

Zernio supports additional X labels via platformSpecificData.

Note: paidPartnership and madeWithAi apply to the root tweet only (for threads).

Paid partnership label

Set platformSpecificData.paidPartnership: true to label the post as a paid partnership / paid promotion.

Note: Field availability may depend on your X API access tier.

curl -X POST https://zernio.com/api/v1/posts \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "content": "Sponsored: our new feature is live",
    "platforms": [{
      "platform": "twitter",
      "accountId": "YOUR_ACCOUNT_ID",
      "platformSpecificData": {
        "paidPartnership": true
      }
    }],
    "publishNow": true
  }'

AI-generated media label

Set platformSpecificData.madeWithAi: true to label the post as containing AI-generated media.

Note: Per X, this label is for AI-generated media, not AI-written text.

curl -X POST https://zernio.com/api/v1/posts \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "content": "AI-generated image (labeled)",
    "mediaItems": [
      {"type": "image", "url": "https://cdn.example.com/ai-image.jpg"}
    ],
    "platforms": [{
      "platform": "twitter",
      "accountId": "YOUR_ACCOUNT_ID",
      "platformSpecificData": {
        "madeWithAi": true
      }
    }],
    "publishNow": true
  }'

Sensitive media warning

Use platformSpecificData.sensitiveMedia to mark attached media with a sensitive-content warning.

Note: Requires media (ignored for text-only tweets). At least one flag must be true.

curl -X POST https://zernio.com/api/v1/posts \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "content": "Sensitive media example",
    "mediaItems": [
      {"type": "image", "url": "https://cdn.example.com/photo.jpg"}
    ],
    "platforms": [{
      "platform": "twitter",
      "accountId": "YOUR_ACCOUNT_ID",
      "platformSpecificData": {
        "sensitiveMedia": {
          "adultContent": true,
          "graphicViolence": false,
          "other": false
        }
      }
    }],
    "publishNow": true
  }'

Polls

Create an X (Twitter) poll by providing platformSpecificData.poll.

Note: Polls are mutually exclusive with mediaItems and platformSpecificData.threadItems.

curl -X POST https://zernio.com/api/v1/posts \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "content": "Which feature should we ship next?",
    "platforms": [{
      "platform": "twitter",
      "accountId": "YOUR_ACCOUNT_ID",
      "platformSpecificData": {
        "poll": {
          "options": ["Dark mode", "New analytics", "More integrations"],
          "duration_minutes": 1440
        }
      }
    }],
    "publishNow": true
  }'

Media URL Requirements

These do not work as media URLs:

Google Drive -- returns an HTML download page, not the file
Dropbox -- returns an HTML preview page
OneDrive / SharePoint -- returns HTML
iCloud -- returns HTML

Test your URL in an incognito browser window. If you see a webpage instead of the raw image or video, it will not work.

Media URLs must be:

Publicly accessible (no authentication required)
Returning actual media bytes with the correct Content-Type header
Not behind redirects that resolve to HTML pages
Hosted on a fast, reliable CDN

Supabase URLs: Zernio auto-proxies Supabase storage URLs, so they work without additional configuration.

Fields, Geo & Polls

Platform-Specific Fields

Geo-Restriction

Paid partnership, AI labels, and sensitive media

Paid partnership label

AI-generated media label

Sensitive media warning

Polls

Media URL Requirements

On this page

Fields, Geo & Polls

Platform-Specific Fields

Geo-Restriction

Paid partnership, AI labels, and sensitive media

Paid partnership label

AI-generated media label

Sensitive media warning

Polls

Media URL Requirements

On this page