Social Media Posting API for Developers

How It Works

1. 1.
   Get Your API Key

   Sign up free, generate a key from the dashboard. 20 posts/month included.
2. 2.
   Connect Social Accounts

   Link accounts via OAuth. Each gets a unique ID for API calls.
3. 3.
   Start Posting

   One API call to publish across all platforms. Ship your first post in under 15 minutes.

Why Developers Choose Zernio

How Much Does a Social Media Posting API Cost?

Building and maintaining 15 platform integrations in-house takes 6+ months of engineering time. Using a native platform API means managing separate auth, rate limits, and media specs for each one. Here’s how Zernio compares.

* Zernio Free tier: 20 posts/month with full API access. No credit card required.

Code Examples

curl -X POST https://zernio.com/api/v1/posts \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "content": "Hello from Zernio API!",
    "scheduledFor": "2026-03-15T10:00:00Z",
    "timezone": "America/New_York",
    "platforms": [
      {"platform": "twitter", "accountId": "acc_123"},
      {"platform": "linkedin", "accountId": "acc_456"},
      {"platform": "instagram", "accountId": "acc_789"}
    ]
  }'

import requests

response = requests.post(
    "https://zernio.com/api/v1/posts",
    headers={"Authorization": "Bearer YOUR_API_KEY"},
    json={
        "content": "Automated post from Python",
        "scheduledFor": "2026-03-15T10:00:00Z",
        "platforms": [
            {"platform": "twitter", "accountId": "acc_123"},
            {"platform": "linkedin", "accountId": "acc_456"}
        ]
    }
)
print(response.json())

const response = await fetch("https://zernio.com/api/v1/posts", {
  method: "POST",
  headers: {
    "Authorization": "Bearer YOUR_API_KEY",
    "Content-Type": "application/json"
  },
  body: JSON.stringify({
    content: "Posted from Node.js!",
    scheduledFor: "2026-03-15T10:00:00Z",
    platforms: [
      { platform: "twitter", accountId: "acc_123" },
      { platform: "instagram", accountId: "acc_789" }
    ]
  })
});
console.log(await response.json());

curl -X GET https://zernio.com/api/v1/analytics/post_abc \
  -H "Authorization: Bearer YOUR_API_KEY"

# Response:
# {
#   "postId": "post_abc",
#   "platforms": {
#     "twitter": { "likes": 42, "retweets": 12, "impressions": 1580 },
#     "linkedin": { "likes": 67, "comments": 8, "impressions": 3200 }
#   }
# }

Supported Platforms

Post to all 15 major platforms from one API.

See it in action

Create, schedule, and publish posts with a single API call.

Generate API keys and start building in minutes.

One integration replaces dozens of platform-specific SDKs.

Frequently Asked Questions

What is a social media posting API?

└A social media posting API is a REST interface that lets developers publish content to social platforms programmatically. Instead of building separate integrations, a unified posting API like Zernio handles auth, media formatting, and rate limits across 15 platforms with one endpoint.

How many platforms does Zernio's posting API support?

└15 platforms: Instagram, TikTok, X/Twitter, Facebook, LinkedIn, YouTube, WhatsApp, Threads, Pinterest, Reddit, Bluesky, Telegram, Google Business, Snapchat, and Discord.

Is there a free tier for the social media posting API?

└Yes. Zernio's free plan includes 20 posts/month with full API access, and 2 social sets. Paid plans start at $19/month.

How long does it take to integrate?

└Most developers ship their first post in under 5 minutes. Sign up, generate an API key, and make a single POST request. No platform developer apps or OAuth setup required on your end.

What media types are supported?

└Images (JPEG, PNG, GIF, WebP), videos (MP4, MOV), carousels, Stories, and Reels. Upload directly or provide a public URL.

Can I use Zernio with n8n or Make?

└Yes. Official n8n community node with pre-built actions. For Make and Zapier, use webhook endpoints to trigger workflows.

Can AI agents use Zernio to post on social media?

└Yes. Zernio ships an MCP server with 280+ tools that works with Claude Desktop, Cursor, and any MCP-compatible client. Your agent can post, schedule, and manage content via natural language.

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