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Posts

Create post

Create and optionally publish a post. Immediate posts (publishNow: true) include platformPostUrl in the response. Content is optional when media is attached, all platforms have customContent, every platform entry is an X Article (platformSpecificData.article), or every platform entry is a LinkedIn text-free reshare (platformSpecificData.reshareUrl with no text). See each platform's schema for media constraints.

Idempotency

Two layers of duplicate-protection apply, so safe-to-retry callers (network blips, n8n / Zapier retries, etc.) don't accidentally double-post.

1. Same-request idempotency (5-minute window). Pass an x-request-id header to mark a logical request. If a second request arrives with the same x-request-id while the first is in-flight (or within ~5 minutes of completion), we return HTTP 200 with the original post in the existingPost field — no new post is created. The official Zernio SDKs auto-generate a unique x-request-id per call. If you're using a generic HTTP client (curl, n8n's HTTP node, Zapier, custom code), either:

  • Set a unique x-request-id per logical call (recommended — UUIDv4 is fine)
  • Or simply omit the header — we'll treat each request as new

Common pitfall: if your workflow tool uses a single execution-level request ID and reuses it across multiple HTTP nodes (e.g. one ID for the whole run, shared across 6 different platform calls), every call after the first will look like a retry of the first and return its post. Generate a fresh ID per node.

2. Content-hash dedup (24-hour window). Independently, we hash (platform, accountId, content + media URLs) and reject duplicates within 24 hours with HTTP 409. This catches genuine "same content posted twice to the same account" cases regardless of x-request-id. Returns error, accountId, platform, and existingPostId so you can find the original. To intentionally re-post identical content within 24h, change something (the caption, the media, the account) — the dedup is keyed on the full content fingerprint.

Order: same-x-request-id retries (200) are checked first; if no idempotency match, the content-hash dedup (409) runs.

post/v1/posts

Headers

x-request-idstring uuid

Optional client-generated request identifier for safe retry (idempotency). When two requests carry the same value, the second is treated as a retry of the first and returns the original post (HTTP 200) instead of creating a duplicate. Window is ~5 minutes from the first request. Generate a UUID per logical call. SDKs do this automatically; HTTP clients should set it themselves or omit it. See the operation description for the full idempotency contract.

Request body

titlestring
contentstring

Post caption/text. Optional when media is attached, all platforms have customContent, every platform entry is an X Article (platformSpecificData.article), or every platform entry is a LinkedIn text-free reshare (platformSpecificData.reshareUrl with no text). Required for other text-only posts.

scheduledForstring date-time
publishNowboolean
isDraftboolean

When true, saves the post as a draft. When none of scheduledFor, publishNow, or queuedFromProfile are provided, the post defaults to draft automatically.

timezonestring
tagsstring[]

Tags/keywords. YouTube constraints: each tag max 100 chars, combined max 500 chars, duplicates auto-removed.

hashtagsstring[]
mentionsstring[]

Stored for reference only. This field does NOT automatically create @mentions when publishing. For LinkedIn @mentions, use the /v1/accounts/{accountId}/linkedin-mentions endpoint to resolve profile URLs to URNs, then embed the returned mentionFormat directly in the post content field.

crosspostingEnabledboolean
metadataobject
queuedFromProfilestring

Profile ID to schedule via queue. When provided without scheduledFor, the post is auto-assigned to the next available slot. Do not call /v1/queue/next-slot and use that time in scheduledFor, as that bypasses queue locking.

queueIdstring

Specific queue ID to use when scheduling via queue. Only used when queuedFromProfile is also provided. If omitted, uses the profile's default queue.

Response

Post created

messagestring

Example response

{
  "post": {
    "platforms": [
      {
        "platform": "twitter",
        "status": "pending",
        "platformPostId": "1234567890123456789",
        "platformPostUrl": "https://twitter.com/acmecorp/status/1234567890123456789"
      }
    ]
  }
}

Changes

Changed in 9 of the 26 revisions of this API.3517

  • 0cdc3e98bff911See the full diff
    • ▲

      the post/platforms/items/platformSpecificData response's property type/format changed from / to object/ for status 201

      response-property-type-changed

    • ○

      removed TwitterPlatformData ThreadsPlatformData FacebookPlatformData InstagramPlatformData LinkedInPlatformData PinterestPlatformData YouTubePlatformData GoogleBusinessPlatformData TikTokPlatformData TelegramPlatformData SnapchatPlatformData RedditPlatformData BlueskyPlatformData DiscordPlatformData SlackPlatformData from the post/platforms/items/platformSpecificData response property oneOf list for the response status 201

      response-property-one-of-removed

  • b5344d376e5e8See the full diff
    • ○

      added the new optional request property platforms/items/platformSpecificData/oneOf[InstagramPlatformData]/muteAudio

      new-optional-request-property

    • ○

      added the new optional request property platforms/items/platformSpecificData/oneOf[PinterestPlatformData]/boardSectionId

      new-optional-request-property

    • ○

      added the new optional request property platforms/items/platformSpecificData/oneOf[PinterestPlatformData]/isAiGenerated

      new-optional-request-property

    • ○

      added the new optional request property platforms/items/platformSpecificData/oneOf[ThreadsPlatformData]/firstComment

      new-optional-request-property

    • ○

      added the optional property post/platforms/items/platformSpecificData/oneOf[InstagramPlatformData]/muteAudio to the response with the 201 status

      response-optional-property-added

    • ○

      added the optional property post/platforms/items/platformSpecificData/oneOf[PinterestPlatformData]/boardSectionId to the response with the 201 status

      response-optional-property-added

    • ○

      added the optional property post/platforms/items/platformSpecificData/oneOf[PinterestPlatformData]/isAiGenerated to the response with the 201 status

      response-optional-property-added

    • ○

      added the optional property post/platforms/items/platformSpecificData/oneOf[ThreadsPlatformData]/firstComment to the response with the 201 status

      response-optional-property-added

  • 26bee5940ef62See the full diff
    • ○

      added the new optional request property platforms/items/platformSpecificData/oneOf[TwitterPlatformData]/article

      new-optional-request-property

    • ○

      added the optional property post/platforms/items/platformSpecificData/oneOf[TwitterPlatformData]/article to the response with the 201 status

      response-optional-property-added

  • 5d3a131531d92See the full diff
    • ▲

      the response property post/platforms/items/platformPostUrl became nullable for the status 201

      response-property-became-nullable

    • ▲

      the post/platforms/items/platformPostUrl response's property type/format changed from string/uri to string null/ for status 201

      response-property-type-changed

  • d0ab3b4eb0ae2See the full diff
    • ●

      added the new platform_rate_limit enum value to the post/platforms/items/errorCategory response property for the response status 201

      response-property-enum-value-added

    • ●

      added the new quota_exhausted enum value to the post/platforms/items/errorCategory response property for the response status 201

      response-property-enum-value-added

  • a23bb6e634382See the full diff
    • ○

      added the new optional request property platforms/items/platformSpecificData/oneOf[BlueskyPlatformData]/langs

      new-optional-request-property

    • ○

      added the optional property post/platforms/items/platformSpecificData/oneOf[BlueskyPlatformData]/langs to the response with the 201 status

      response-optional-property-added

  • 0942091eaa8c3See the full diff
    • ●

      added the new phone enum value to the post/platforms/items/accountId/oneOf[SocialAccount]/platform response property for the response status 201

      response-property-enum-value-added

    • ●

      added the new rcs enum value to the post/platforms/items/accountId/oneOf[SocialAccount]/platform response property for the response status 201

      response-property-enum-value-added

    • ●

      added the new sms enum value to the post/platforms/items/accountId/oneOf[SocialAccount]/platform response property for the response status 201

      response-property-enum-value-added

  • e0cd920708582See the full diff
    • ○

      added the new optional request property platforms/items/platformSpecificData/oneOf[LinkedInPlatformData]/poll

      new-optional-request-property

    • ○

      added the optional property post/platforms/items/platformSpecificData/oneOf[LinkedInPlatformData]/poll to the response with the 201 status

      response-optional-property-added

  • 1e9a379eafca2See the full diff
    • ○

      added the new optional request property platforms/items/platformSpecificData/oneOf[InstagramPlatformData]/audioConfiguration

      new-optional-request-property

    • ○

      added the optional property post/platforms/items/platformSpecificData/oneOf[InstagramPlatformData]/audioConfiguration to the response with the 201 status

      response-optional-property-added