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Generate and publish social posts with Gemini, Kie.ai, and Zernio API

Quick overview Generate & publish social media content with Gemini, Kie.ai, and Zernio API How it works Google Gemini (gemini-2.5-flash) generates platform-optimized copy for Facebook, Instagram, LinkedIn, and TikTok, returned as structured JSON with hashtags and a suggested posting time. Kie.ai Seedream v4 creates a branded 1080x1080 image; the workflow polls the task until the CDN image URL is ready. The image is uploaded to Zernio: direct multipart upload for files up to 4MB, presigned upload (init + PUT) for larger files up to 5GB. A post is created on each enabled platform through the Zernio posts endpoint, with the correct platform and accountId mapping, and published immediately. All platform responses are merged into one success report with ready-to-send messages for Slack, Discord, email, and webhook notifications. Setup Google Gemini (gemini-2.5-flash) generates platform-optimized copy for Facebook, Instagram, LinkedIn, and TikTok, returned as structured JSON with hashtags and a suggested posting time. Kie.ai Seedream v4 creates a branded 1080x1080 image; the workflow polls the task until the CDN image URL is ready. The image is uploaded to Zernio: direct multipart upload for files up to 4MB, presigned upload (init + PUT) for larger files up to 5GB. A post is created on each enabled platform through the Zernio posts endpoint, with the correct platform and accountId mapping, and published immediately. All platform responses are merged into one success report with ready-to-send messages for Slack, Discord, email, and webhook notifications. Requirements Google Gemini (gemini-2.5-flash) generates platform-optimized copy for Facebook, Instagram, LinkedIn, and TikTok, returned as structured JSON with hashtags and a suggested posting time. Kie.ai Seedream v4 creates a branded 1080x1080 image; the workflow polls the task until the CDN image URL is ready. The image is uploaded to Zernio: direct multipart upload for files up to 4MB, presigned upload (init + PUT) for larger files up to 5GB. A post is created on each enabled platform through the Zernio posts endpoint, with the correct platform and accountId mapping, and published immediately. All platform responses are merged into one success report with ready-to-send messages for Slack, Discord, email, and webhook notifications. Customization Edit the Gemini prompt to change tone, language, platform mix, or content structure Swap the image model or prompt in the Kie.ai node Replace publishNow with scheduledFor (ISO 8601 UTC) to schedule posts instead of publishing instantly Wire the prepared notification payload into your own Slack, Discord, or email nodes Swap the manual trigger for a Schedule or Webhook trigger for full autopilot Additional info Sticky notes inside the workflow document every section: overview, credentials, content generation, image generation, media upload, publishing logic, notifications, and error handling. Fallback content is included in case Gemini returns unparseable JSON. Estimated cost per run: about $0.02 for one Seedream image, a fraction of a cent for Gemini text, and no per-post cost from Zernio (usage-based pricing). Built by Adrian (RoboMarketing) for the n8n Arena Challenge, September 2025; updated for the Late to Zernio rebrand with the new presigned upload flow.

workflowautomationdocumentsHTTP RequesthttpRequestDevelopmentCore NodesCode
View on n8n

Rank

79

Safety

80

Updated

Oct 9, 2026

Source

n8n

About

What it does, and when to use it.

Capability contract not published. No trust telemetry is available yet. Last updated 10/9/2026.

Avoid when

  • Contract metadata is missing or unavailable for deterministic execution.

Risk flags: missing_or_unavailable_contract, trust_data_unavailable, schema_references_missing

Public facts

Every fact links back to the source it came from.

Vendor
N8nvendor · observed Oct 9, 2026
Handshake status
UNKNOWNsecurity

Install and run

Setup complexity: low.

  1. No published capability contract is available yet, so validate auth and request/response behavior manually.
  2. Review the upstream n8n listing at https://n8n.io/workflows/8965-generate-and-publish-social-posts-with-gemini-kie-ai-and-zernio/ before using production credentials.

Contract: missing

curl -s "https://www.xpersona.co/api/v1/agents/n8n-8965-generate-and-publish-social-posts-with-gemini-kie-ai-a/snapshot"

Documentation

n8n

3,311 characters of source documentation, loaded on request.

Machine-readable data

The same record, as JSON, for agents and crawlers.

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Record generated Oct 10, 2026.

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