Zernio
What is Zernio?
Zernio is a social media and messaging API for developers, SaaS companies, automation builders, and AI agents. It provides one integration for publishing, scheduling, analytics, inbox management, advertising, WhatsApp, phone numbers, SMS, and calls across multiple platforms. The service uses REST APIs, SDKs, a command-line interface, and an MCP server to support both traditional software integrations and natural-language agent workflows. Hosted OAuth reduces the need to create and maintain separate developer apps for every supported channel. Zernio offers two connected social accounts free, while additional accounts use usage-based billing.
How to use Zernio?
1) Sign up for Zernio and create an API key; 2) connect social, messaging, advertising, or phone accounts through hosted OAuth; 3) use the REST API, SDK, CLI, or MCP server to publish content, manage conversations, run campaigns, or retrieve analytics.
Zernio's Core Features
Multi-Platform Publishing: Publish text, images, videos, carousels, threads, and first comments across connected channels from one API call.
Hosted OAuth Connections: Connect supported social, messaging, and advertising accounts without building separate platform authorization flows.
Scheduling and Queues: Schedule content, manage publishing queues, and coordinate recurring social workflows programmatically.
Unified Analytics: Retrieve impressions, reach, engagement, views, clicks, and follower metrics across connected accounts.
Inbox and Messaging API: Read and send direct messages while managing comments, reviews, mentions, contacts, and conversations.
Advertising API: Create, manage, boost, and analyze campaigns across supported ad networks without maintaining multiple integrations.
Webhooks and Retries: Receive real-time delivery events and failure notifications while reducing the need for polling.
WhatsApp and Telephony: Provision phone numbers and support WhatsApp, SMS, MMS, inbound calls, outbound calls, and call recording.
AI Agent Integrations: Connect Claude, ChatGPT, Cursor, Claude Code, and other MCP-compatible clients through a hosted MCP server.
Developer Tooling: Build integrations with the REST API, CLI, and official SDKs for multiple programming languages.
Zernio's Use Cases
- #1
SaaS teams embedding multi-platform social publishing into a customer dashboard
- #2
AI agents scheduling posts and retrieving engagement data through an MCP server
- #3
Marketing platforms managing Instagram, TikTok, LinkedIn, Facebook, and X publishing from one API
- #4
Agencies connecting and operating hundreds of client social accounts with usage-based billing
- #5
Customer support products adding WhatsApp messaging, phone numbers, SMS, and calls
- #6
Automation workflows triggering social posts, replies, and notifications through webhooks
- #7
Ad-tech products creating and monitoring campaigns across several advertising networks
- #8
Developers building unified inboxes for direct messages, comments, reviews, and mentions
Frequently Asked Questions
Analytics of Zernio
Monthly Visits Trend: Dec 2025 - Jul 2026
Traffic Sources
AI Channel Traffic Trends
Top Regions
| Region | Traffic Share |
|---|---|
| United States | 29.40% |
| Spain | 5.73% |
| Canada | 5.19% |
| Brazil | 4.78% |
| India | 4.04% |
Top Keywords
| Keyword | Traffic | CPC |
|---|---|---|
| zernio | 52.9K | $3.57 |
| zernio api | 1.8K | -- |
| postiz | 115.0K | $2.35 |
| api whatsapp | 14.1K | $1.61 |
| zernio mcp | 1.4K | -- |
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